Gehe zu Seite: Erste Letzte |nächste|

Hi to all.. I am Sandeep

+A -A
Autor
Beitrag
Sonic_Master
Stammgast
#1 erstellt: 23. Apr 2005, 08:12
hello I am Sandeep and I am new to this hifi forum...
I am B.Tech in Electronics and comm even my passion is towards HIFI

so I have a Proac clone and I build speakers for custom applications.

If anybody are intrested I can build speakers.... in some cases which are highend than the proac...( not joking )
That too for fraction of the total cost.

The entire system is built using somehighend softwares and complex simulations as well as rigirous listening tests.
Oh one more thing is that i can give very exotic finish for the speakers.

I can even build amplifiers which are veryhighend like the Jeff Rowland CONCENTRA 2 with some highend ICs for low cost I build amplifiers with the following specs...

60 WATTS into 8 ohms and 100 WATTS into 4 ohms with IMD of 0.004% and THD of 0.03% with ultra fast switching diodes and see... you just see the specs of the CONCENTRA 2.

Anyway im releasing these products in the market in a month.

Mail me for further enquiries >>>>> smartdeep21@yahoo.com

So intrested guys give your comments.



benkenobi
Hat sich gelöscht
#2 erstellt: 23. Apr 2005, 13:36
Hi there Sandeep, and welcome to the forum.
Can u please give details of ur speakers, like specs and the drivers that u use and the kind of wood- working that u use.
also, how competettiveley are u pricing these speakers.
if possible can u post pictures of ur speakers.
u can go to imageshack.us thru which u can post ur speakers and amps.
Cheers,
Ben
Sonic_Master
Stammgast
#3 erstellt: 23. Apr 2005, 22:03
well the kind fo drivers that i use are very highend and the wood that i use is highend MDF ( MEDIUM DENSITY FIBER )and for the crossover that i use prolypropelene caps and copper based inductors with gold plated connectors and as well as oxygen free copper cable( with heavy guage ) is used for wiring inside the cabinet.

The prices are very competetive and you have to wait for some time for images.

I will give still highend speakers than the proac Tablette
Reference 8 signature with still hignend stuff for 2/3 price since the quality of drivers that i use are really hignend and are even used in the wilsonaudio sophia and Alexandria 2 etc...

So if anybody are intrested then you can contact me for further details

I am buyin an new digital cam and after that i will post the images.

Further doubts please dont hesitate to reply..
benkenobi
Hat sich gelöscht
#4 erstellt: 24. Apr 2005, 05:58
i'm sorry, but ur reply did not answer my questions.
what company drivers are u using for the speakers ,and what do u mean by high end MDF? i did not know there were quality differences(only that they have different sizes).
also the internal wiring part and crossover parts are not uncommon in many diy systems unless u r using extremely high end components.
please specify the component makes and also r u a one man team design wise or do u have a team of people working for u.
what kind of testing do u do for these speakers and what is the partnering equipment and what are they benchmarked against?
also what are the kind of recordings and music u test it with?
Cheers,
Ben
Arj
Inventar
#5 erstellt: 24. Apr 2005, 09:40
HI Sandeep,
Welcome to the forum !

Without sounding too sceptical, what we would be interested in knowing is
- you credentials in acoustics
- details as Benks as correctly mentioned above
- you experience with speaker design.


just the enclosure , drivers and components do not make a good speaker. the reason Proacs etc charge the rate they do is due to the quality processes ,the R&D, the logistics and the number of people ivolved in understnding the market etc to "voice" the speakers etc.

hence if you can do that at 2/3rd the costs we would definitely what to know how you are doing it hope that is fair.
if this is just going to be DYI from the scores of Proac designs available on the net then the cost should actually be much lower than 2/3rd..and would only vary with the kind of enclosure requested for !

just my 2 cents
Cheers !
Sonic_Master
Stammgast
#6 erstellt: 24. Apr 2005, 12:25
well there are diff kinds of MDFs available like Nuwood MDF which is acoustically dead.(so they dont product unnecessary resonances)

The drivers what I use is vifa scanspeaks and the crossover components are used are high grade polypropelene and this time i am trying with teflon caps which are the best but very expensive but give excellent highs

I have been in research for the past 4 years and now I am the only person in a month i will be having couple of people working under me.

I design enclosures with highend softwares there is not doubt about that and I even simulate the speaker which shows how it sounds when its constructed.

My experience in speaker design is about 3 years.

Well one more important thing is that first you listen to my speakers and then justify that it I believe in practical results.

Any questions please reply..
Sonic_Master
Stammgast
#7 erstellt: 24. Apr 2005, 12:32
some of the European speaker manufacturers build enclosures in India because of getting exotic wood as well as low construction cost as well as skilled people.

Many speakers finishing are made up of a decolum called as SUNDEK which looks very exotic and they have very broad spectrum of models.

So see what the speakers that you are listening atleast 40 percent of speakers are made in India. So just dont underestimate ours capability
jsa_ind
Stammgast
#8 erstellt: 24. Apr 2005, 20:39
Do you built iso bariks ? If so is the Vas halved or doubled ? Does the Fs decrease or increase or remain constant ?

Have you used Leap if so what version are you using ?

Do you know the brands that are manufactured in INDIA ?

As far as I know only Peerless do some enclosures in India
abhi.pani
Inventar
#9 erstellt: 25. Apr 2005, 04:51
Hi Sandeep,
Where are you placed at ? How do you intend give us a demo ?
Are the speakers and amps actually ready for Market demo.
hifinovice1
Stammgast
#10 erstellt: 25. Apr 2005, 06:15
Hi Sandeep,
Many of us are interested,but would like to hear see images of the speakers,and amps as well.
Send us the link/photos/specs,as soon as they are ready.
Also interested in knowing which European speakers outsource from India?
Thanks.
benkenobi
Hat sich gelöscht
#11 erstellt: 25. Apr 2005, 06:28

Sonic_Master schrieb:
well there are diff kinds of MDFs available like Nuwood MDF which is acoustically dead.(so they dont product unnecessary resonances)


Nuwood is the basic type of MDF used by all diy speaker builders in India so there is nothing so speacial about it.
virtually every indian speaker builder on diyaudio.com uses Nuwood MDF.

Sonic_Master schrieb:

The drivers what I use is vifa scanspeaks and the crossover components are used are high grade polypropelene and this time i am trying with teflon caps which are the best but very expensive but give excellent highs



again there is nothing special about Vifa drivers though scanspeaks are faar above the vifa ones and are considered to be excellent drivers. but frankly u can't compare vifa drivers for those that are in use in Proac.
also the crossover components u have mentioned are also not that uncommon to be used in amateur speaker building.



Well one more important thing is that first you listen to my speakers and then justify that it I believe in practical results.

Any questions please reply..


but like u said i cannot pass judgement on ur speaker swithout listening to them and await ur pics on the forum.

Cheers,
Ben
Sonic_Master
Stammgast
#12 erstellt: 25. Apr 2005, 06:49
well wait you have to wait for some time like 10 days for that recently i have sold out some speakers now im building some of them....

well one more thing vifa and scanspeak comes from the same manufacturers no doubt they re veryhighend drivers

one more thing is that many diy enthusiasts became highend manufacturers like WISDOM AUDIO he started arround 1996 till them he use to get the drivers and he used to make speakers for custom tastes and then he got good reputation within a short time and now today after 6 years his speakers are one of the best speakers. why because these didnt start as commercial ....

Example: Proac speakers come with wood with 3/4 inch thickness and what I use is about 1 inch which is more rugged and acoustically dead and even rocksolid which produces voice with more emotional and strong and ... see as far the enclosure design is concerned what is the most important thing is that internal volume if you can perfectly fix that internal volume then they will definitely sound well....

and the cabinet strongness example more strong more good example>>> krell lat speakers ( lossless acoustic transducers) why are they so good read reviews here...

http://www.soundstage.com/revequip/krell_lat2.htm
http://www.stereophile.com/showarchives.cgi?382

So it all depends upon the quality of material...and the design.

So i make all the things which are very good.

Did u hear anyspeaker attempted to make good crossovers using TEFLON CAPs which are very awesome for sound? the answer is not even DYNAUDIO ...

so guys wait for my speakers at the same time..give me some time

I actually live in Anantapur in AP 4 hours from Bangalore well if anybody are intrested you can check my speakers when in come to Bangalore well i may come there in a month or so.. because I have orders up here who wants my speakers and complete home theater setups with ACOUSTICS calculations with placement of the speakers exaclty in the surround mode.

To tweak the placements it takes time but any way as soon as possible i will shift to Bangalore and you can see my speakers.

But at present I have a mid end order and i will show you the pics of those speakers. ok?

I dont know which speakers enclosures are done in India but may be Jamo or i think i hve read somewhere that Dyns are making their enclosures in India. Give me some time to know that but at present im very busy i will check them later...

Any quests feel free to reply.
TROJAN_HORSE
Gesperrt
#13 erstellt: 25. Apr 2005, 06:51
sandeep wrote :


so I have a Proac clone and I build speakers for custom applications.

If anybody are intrested I can build speakers.... in some cases which are highend than the proac...( not joking )
That too for fraction of the total cost.


are you sure.never ever heard proac's but some members here
swear by them. I personally feel a good product under goes several bench tests and lab tests and costs lot of money. I'm sure you have some millions. for that. You give me Proac clone with 2/3rd performance of Proac at the full price of Proac and I would beleive, but you seem to have arousen suspisions. So stand by and prove.I like your confidence but don't shoot lions in air.


The entire system is built using somehighend softwares and complex simulations as well as rigirous listening tests.
Oh one more thing is that i can give very exotic finish for the speakers.


what softwares are you using?


I design enclosures with highend softwares there is not doubt about that and I even simulate the speaker which shows how it sounds when its constructed.


If this software can tell you how it sounds, then speaker building would be like cooking eggs and every one would build his own proac's and rowlands at home.I hope you are not influenced too much by Jmaes bond.
Sonic_Master
Stammgast
#14 erstellt: 25. Apr 2005, 06:53
well the speakers will be ready for market sale in a month so wait for them but they are fo mid end at present and for very highend stuff you have to wait for one and half month.


Definitely as soon as I finsh the product then I will contact you people.
Sonic_Master
Stammgast
#15 erstellt: 25. Apr 2005, 06:59
no trojan horse see...

speaker designing is not an easy task by using softwares they become easy for calculations thats it..


Any speaker is justified by rigorous listening tests...

Take my word that if you really want to justify some speakers which are highly competetive it will take you atleast a month to find the differences between them....

so i make good listening tests before i finally justify the speakers.

Thats why I said that u people listen to these speakers i will inform you when they are ready.
big-ears
Stammgast
#16 erstellt: 25. Apr 2005, 07:05
Hi Sonic,

Good to know about your activities, but how and where do you test your creations? What facilities do you have?

Cheers
Sonic_Master
Stammgast
#17 erstellt: 25. Apr 2005, 07:14
Right for the person who asked about the isobarik speakers.

I will tell you what happens with the iso barik speaker and where its used.

Firstly Isobark means the pressure is same inside and the outside the cabinet and this alignment is made so that pressure is same inside and the outside world and this is done only inthe ported enclosures where massive amount of air should push pull very frequently.

The advantage of this kind of setup is it gives more SPL ( sound pressure level at the LOW END and this application will be very much useful in the suboofer but

THE VAS OF THE DRIVER IS CUT IN HALF( as u question me regarding this)
the complete explanation is like this...



Two drivers are mounted together in an enclosure with a cavity of air between the two drivers. The drivers must operate in phase with each other. The cavity of air between the drivers should be made as small as possible without compromising the operation of either driver. The modeling for this type of enclosure is done just as you would any other speaker enclosure except you take the Vas of the driver and divide by 2. This will in effect make all your speaker enclosures half as big as they would normally be for any particular driver.


ADVANTAGES:
Improved sonic bass response. Bass is claimed as being tighter, faster, more accurate and more pure. Vas of the driver is cut in half. The volume of enclosure required to obtain a specific frequency response can be achieved in only half the volume. This is where isobaric enclosures have their biggest advantage.

DISADVANTAGE:

Wasted amplifier power to driver the internal sub. Efficiency of the system is down 3 dB as compared to a single driver due to the added cone mass and the reduced Vas. When you compare isobarics to a system which houses two drivers each in their own enclosure, this system would actually be 6 dB less efficient and group delay increases at the low frequencies which means that the driver is not brucelee its fast but not very fast so you will not enjoy the fastest response of sound as the single driver.


BEST APPLICAITONS:


Where size is a big issue. When you want the box to be very small. Where more accurate bass is more important than lots of bass. If you have a hefty amplifier with plenty of juice to spare and a driver that can handle a good amount of power. Suited for music, home theater and car. But in music as in the Midbass drivers its not recommended because they dont produce pin point imaging like single drivers.

These are practically used in the SUBWOOFER APPLICATIONs not in the bookshelf and surround speakers where quality is much more important. so if you sacrifice the quality for more SPL then you can go for this that too for subwoofer applications.

It all depends upon your application and your room size taste etc etc..


Any questions regarding my speakers go ahead..
Sonic_Master
Stammgast
#18 erstellt: 25. Apr 2005, 07:20
well i test my speakers in my room at the night times at about 2 am so that it will be free of noises and as well as i have an amplifier which indicates the power as low as 0.0032watts and with my speaker i can still enjoy the complete spectrum reproduction at that very low input level.

I have signal generators with 97db of SNR and i can alter the frequencies and i can check them at any freq i can upto 20kHz
Sonic_Master
Stammgast
#19 erstellt: 25. Apr 2005, 07:22
some times i keep that low level sound like app 0.0032watts and then i will go to sleep for long time. like even if i open my eyes at the night i can still hear the suble sounds very very thin sounds with softness.. I just love that..
jsa_ind
Stammgast
#20 erstellt: 25. Apr 2005, 09:08
My questions have only been partially answered......

Does the Fs decrease or increase or remain constant ?

Have you used Leap if so what version are you using ?

Additionally how do you check for driver inconsistencies ?

Would you be interested in a A/B comparision between a Harbeth + Plinius combination versus your brand ? We could get a wide spectrum of people to do a blind A/B test and draw a conclusion.........
Sonic_Master
Stammgast
#21 erstellt: 25. Apr 2005, 09:32
see Jsa_ind the Fs of a driver doesnt change no matter you use single driver or in isobarik mode well see some more answers are.... Qts will also be same and fb of single driver is more than the isobark.

well as far as the leap software is concerned Its very expensive software so im not using that one. but in near future im going to buy that.

The amps that i make comes under class AB mode so it cannot be compared to class A amps. class A amps are different. My design doesnt come under class A.

As you have said that u could get a wide spectrum of people to do a blind A/B test to draw a conclusion so ........ what are u are u owning a firm? are u MD of any firm?
Sonic_Master
Stammgast
#22 erstellt: 25. Apr 2005, 09:48
what do u use LEAP software? If so im intrested in evaluating them...
Sonic_Master
Stammgast
#23 erstellt: 25. Apr 2005, 10:37
does anyone have room acoustics software?
Sonic_Master
Stammgast
#25 erstellt: 25. Apr 2005, 13:08
well thank you alot and i would like to have a copy of leap software can u give me a copy of that software?

and one more thing that im not talking about the bullshit STKs or something like that...and the ics what i use practically deliver 4 amps at the load and 3 in parallel and with two combinations total 6 components in bridged config it can deliver continuously 10 amps continuously with reduced SNRs THDs to large extent.

I need more details what you have did in the past i want to know what kind of projects that you did before in speaker desings and also amps with what components so that i can estimate what is ur capability regarding amp design.

did u use Sanken components? and what kind of drivers did u use for your projects? give me indepth inf about this so that i can coclude what made ur stuff not getting clicked so i will try why the speakers are not good..atleast i can expect that...

one more thing is that vifa scanspeak if it depends only on the branded market then it will definitely loose its market because the diy market is as good as the commercial market well its possible in some lowend companies i think so...
If above is the case then if a person wants to start a firm regarding highend speakers first he will evaluate with the drivers which are available in the market and after that if he clicks with those drivers then he will order in bulk so what do u say does it mean that the drivers what get for diy market is crap? i dont think so because...like i said there is more market even for the DIY and lets see that i will directly contact to the Denmark and talk to the people in 2 days or if possible tomorrow itself and ask those people regarding this that...

I want to get the top quality drivers with grade A quality and not the grade B or grade C tell me how to order these and what is the thing going on. lets see....
Sonic_Master
Stammgast
#26 erstellt: 25. Apr 2005, 13:10
well one more thing is that im using the same ics which jeff rowland concentra 2 uses no doubt about that...
Sonic_Master
Stammgast
#27 erstellt: 25. Apr 2005, 13:12
the amp what i design can handle about loads equivalent to 2.5 ohms! and the transformer that i use is about 500VA i think this is far more than enough with 20,000uf per channel. so total for high hedroom 300VA with 20,000uf per channel for two channel 625VA with 40,000uf so that the amp is highly stable while drawing high currents.
jsa_ind
Stammgast
#28 erstellt: 25. Apr 2005, 14:33
I think it would be more beneficial for you to buy the software from Linear X directly as I only would be able to have you play around with the software at my place.

I am sure you have much more credentials then I have Sonic Master and hence becoming a consultant to Peerless & distributing Dynaudio shouldn't be a problem for you at all. The important thing is not what personal credentials are or are not, but what do the instruments, software & commons sense tell us in a real world situation.

I some how get the feeling that you feel I am trying to undermine you...I am not. I am just trying to communicate that to get into the world of audio manufacturing one needs very deep pockets &/or a large target audience.

One only has to look at Pulz, Cadence, Sonodyne, BPL, Ahuja etc.... they all have exports as their primary markets & India as a secondary one. So either you have to have an export market to begin with or have very deep pockets. Lithos, Pandam etc are all people who have gone through sustained losses before breaking even.

No offence meant, but you yourself mentioned that Leap was too expensive and that you wanted a copy, indicates that while you have a willing heart the mean's are not there as yet.

Oh I have used Sanken components, but again do you match them or just buy them off the shelf ? If you do match them you are going to have a hard time trying to convince the outside world that you reject the unmatched pairs...other wise the world would think like the drivers they is a possibility of them getting the short end of the stick. If you do say that you dispose the unmatched pairs then the prices are not going to be as low as you think because there is normally a 40% rejection rate.


[Beitrag von jsa_ind am 26. Apr 2005, 00:20 bearbeitet]
sivat
Stammgast
#29 erstellt: 25. Apr 2005, 14:48
Hello,

This is Siva from Corrson.

We assure everyone that DST supplies very high grade drivers to the Indian market. To ensure the commerical feasibility, we have ordered inventory running into hundereds of driver per model. Apart from supplying drivers to retail market (including DIY enthusiast like Sandeep), we also supply drivers to some very reputed brands in India.

As official distributor, we are authorized by DST to sell only products that passes QC; The goal of our partnership is to
1) Promote the VIFA brand in India for the first time
2) Offer hi-quality drivers to local manufacturers at affordable prices and 3) Invest in creating a bigger market for DST's currrent and future range of products in India.

Hence there is no reason for us to supply the Indian market with inferior products. Quality of our products are best judged after seeing and listening to the same. Kindly ignore comments from folks who are making statements based on thier assumptions/imagination.

This message is posted in order to eliminate any concern (due to the recent rumors in the forum) on the quality of VIFA drivers sold in India.

Please write to us at corrson@vsnl.net for further clarification.

Siva, Corrson,
Bangalore.
25th April 2005


[Beitrag von sivat am 25. Apr 2005, 17:52 bearbeitet]
Betelguese
Ist häufiger hier
#30 erstellt: 25. Apr 2005, 15:00
Since I am planning to buy a Lithos SUB . I did a wee bit of reading.
The SUB woofer which they sell is based on the ISObaric principle!!!
They are very open minded about their products and their prices. A thing I liked about them..not much as you audiophiles call "BOOMINESS" in their bass
benkenobi
Hat sich gelöscht
#31 erstellt: 25. Apr 2005, 19:33
Hello,
i agree with Junia.
u will not find matched drivers and i personally have come across numerous references and testing articles on the web pertaining to one of Vifa's largest selling popular drivers ,the P17w0-008.
this driver from the classic line of Vifa is used by Mr.Siva's Acoustic Portrait on their flagship floorstander.
dont' get me wrong,they are superb drivers but as Junia points out, it is very ahrd to find a matched pair of drivers when u pick them off the shelf. the reports i have seen show that the sensitivity rating deviates by as much as +/- 3db from the rated sensitivity.
there are also variations in fs adn other parameters.
However, this driver is a favourite among diy entusiasts and also used in most low end and mid end commercial speakers.
Many companies use this driver.
but i suspect they make sure they get matched components and maybe those that don't meet up to specs get put into the open market, even though they are perfectly in working and QC tested this could be very much probable.
Cheers,
Ben(Sachi)


p.s btw am sure Mr.siva or his staff knwo me cause i wrote to them not less than 5-6 times(when they opened shop) and they are a very accomodating company and replied promptly, though i feel it is still way too expensive for people like me to buy Vifa drivers in India.(since am not working.....yet)


[Beitrag von benkenobi am 25. Apr 2005, 19:44 bearbeitet]
jsa_ind
Stammgast
#32 erstellt: 26. Apr 2005, 00:16
Hi All,

I seemed to have created a storm of controversy which I sincerely regret. It was not my intention to put Vifa down, but to make a general objective analysis based on my personal experience working with Peerless for six years, in their R&D department.

Here is what I can offer provided it does not become too overburdening to my office. The Thiele Small Parameters of every raw driver sent to the office would be tested free of charge & individuals may draw their own conclusions as to the matching of Thiele Small parameters or not. This would be an open test & anyone or everyone would be welcome to be present while the drivers are being tested.

AP http://www.audioprecision.com/index.php?page=products, LEAP http://www.linearx.com & MLSA http://www.mlssa.com/ will be used. If anyone wants to check the authenticity of the software & hardware going to be used in these tests or has questions as to the testing procedures used are more then welcome to do so.

Like Sachi said the question is not of Quality Control, which we all believe is above board when it comes to Vifa or for that matter any reputed speaker driver company.

For those who would like to check things out as to QC, themselves ( at their risk) without getting into Thiele Small parameters (I cannot prove this test mathematically, but what has worked well with me after I doubled checked it with the above equipment) was to stick a woofer driver in a box, and drive it to 100W or so at 20 Hz with a signal generator - you should see a lot of cone movement, a few things will rattle, but you shouldn't actually hear a tone. A "undesirable" speaker will generate 60 Hz (third harmonic) - if you don't hear anything, the speaker has passed QC well enough. If a tone is audible, or the speaker shows any signs of distress (such as the cone breaking up with appropriate awful noises), then the driver may not be used. But please don't take my word as gospel truth. Please have the same checked out with the AP+ Leap+ MLSA combination or with any other equipment (BJ & Neutrik also make good test equipment) & see for yourselves.

I hope this settles matters once in for all.

And again I apologize for rubbing people up the wrong way. It was not my intention to do so.

Regards,

Junia.

P.S. For the sake of harmony I have edited my previous post


[Beitrag von jsa_ind am 26. Apr 2005, 00:22 bearbeitet]
sivat
Stammgast
#33 erstellt: 26. Apr 2005, 02:58
In our experience we did not find VIFA driver's T/S parameters to vary so much that it will affect the quality of its performance, especially considering the limitations of our own ears!!. But yes, the drivers can be matched even more closely ... say at 2-3%, which is what we do for our AP range of products. We can also supply such matched drivers to DIY enthusiasts at an extra cost.

However, many manufacturers using VIFA drivers, believe in putting thier money in other parts of loudspeakers that have a bigger impact on the sound quality. Similar principle will apply for DIY as well. We generally recommend our customers to use higher grade crossover and also improve the quality of the cabinet, instead of trying to spend money on matching the VIFA drivers.

We have seen many reports from DIY enthusiasts that are completely wrong, due to the way in which the T/S parameters are measured. Pleast note that measuring T/S parameters "accurately" is not as straight forward as plugging drivers into a s/w setup. Else, the variation you see will be due to the variations introduced by the measurement equipment or the process followed.

Mr. Junia we appreciate that you shared your experience on the process you have specified for QC. We have ourself seen a company in India that follows such as process. However, we assure you that the QC process at DST is more professional and ensures that T/S parameters do not vary beyond a tolerance factor.

Siva,
Corrson,
26/April/05


[Beitrag von sivat am 26. Apr 2005, 04:48 bearbeitet]
sivat
Stammgast
#34 erstellt: 26. Apr 2005, 03:33
Ben,

Can you please let us know which "low" or "mid" end loudspeakers use the P17WJ0008. We would be glad learn this from you.

We know of atleast one model (of an highly reputed
& imported brand) sold in India costing about 1.8 lakhs - using this particular driver. Given my personal budget, it is defenitely not "low" end to me.

Cheers
Siva.
Sonic_Master
Stammgast
#35 erstellt: 26. Apr 2005, 04:30
yes siva you are right the kind of drivers vifa uses are very good.

Are we insane? coz see the matching of the driver lets take as the change in one parameter like about in 3 percent variation and if that is the variation of parameters in two drivers then lets think about the sweet spot where does it will be it will definitely not at the exact axis as calculated this is the worst case..

That is according to jsa ind if the driver T/S parameter variation is too large then lots of things change but I didnt observe change and I got good and sharp sweetspot while listening to sivas drivers. No matter its vifa or scanspeak.

If the parameter changes by 20 percent then forget about the sweetspot which changes to very large extent...

See the kind of measurement they make at vifa scanspeak is different and very expensive and they check eveydriver see this >>>>


Conditions for measurements


--------------------------------------------------------------------------------

This is a short description of the measuring methods used at vifa/scan-speak.

FREQUENCY RESPONSE
The frequency response curves are measured in one of vifa/scan-speaks anechoic chambers.
The chambers are 6x7x8 meters which gives a lower cut-off frequency at 100 Hz.
The curves are measured in 0°, 30° and 60° with microphones in a distance of 1 meter. The input voltage is 2.83 V.
One of the walls in the anechoic chamber is without damping material and acts like an infinite baffle (2-pi room) for the driver. Behind the driver is a closed box - typically at 320 litres.




The frequency response curves are measured with a Brüel & Kjær 2012 Audio Analyzer and with Brüel & Kjær microphones.


PARAMETERS
The Thiele/Small parameters are measured using the constant current setup sketched below. Mass is added to the driver during the measurement.




We use a Brüel & Kjær 1027 generator with compressor input and a fixed power resistor. The RMS current through the driver is adjusted to 36 mA.
The back plate of the magnet system is fixed in a vice during the measurement.
Scan-speak drivers are run in before the parameters are measured. Vifa and Logic drivers are not.


yes siva this is what happens with the vifa scanspeaks. I believe in the precision of Scanspeak drivers.
Sonic_Master
Stammgast
#36 erstellt: 26. Apr 2005, 04:34
I dont think any lowend or mid end using vifa drivers in India not to mention regarding sony or philips etc...

Even these speakers are nice like I said one more thing is that


HOW MANY PEOPLE UP HERE HAVE TOTALLY UNECHOIC CHAMBERS IN THEIR HOMES TO ENJOY MUSIC? Answer this first and lets see how many will reply for this.


If you want to listen the finest quality sound then you must have Finest rooms with highly Damped non reverberating chambers so How many have

Good thumb rule is that if u have a system cost Rs 2,00,000

Then you must have spent atleast Rs4,00,000 to use the true potential of your speakers.

Sonic_Master
Stammgast
#37 erstellt: 26. Apr 2005, 04:36
SONY, PHILIPS are all dabba speakers. no quality not imaging nothing just a decorated box which shouts like anything i have got this kind of opinions from many people..
Sonic_Master
Stammgast
#38 erstellt: 26. Apr 2005, 04:39
siva i think jsa_ind is talking about the imaging( sweet spot) rather than the quality because the major part which impacts the speakers T/s parameters is the sweet spot.
Sonic_Master
Stammgast
#39 erstellt: 26. Apr 2005, 04:51
ok Jsa_ind like you said it will be very expensive to start a firm for highend audio? You said it will cost millions why? can u explain please>>>>>>
sivat
Stammgast
#40 erstellt: 26. Apr 2005, 05:55
Hi Sonic Master,

You are missing the finer aspects that Jsa-ind is trying to communicate to you. We feel you are not putting the correct messages on the forum...the forum is not intended to discuss business. So please stop discussing this further on the forum...it has already caused lots of confusion and problems.

Please contact Mr. Junia directly...

Cheers
Siva.
Sonic_Master
Stammgast
#41 erstellt: 26. Apr 2005, 06:02
yes siva thank you alot. Ive sent personal mail to him and im expecting his mail soon...

yes this forum is going somewhere else...

siva how much the matched drivers costs? the P17 model ? without tax
Prithvi
Stammgast
#42 erstellt: 26. Apr 2005, 06:25
There u go again about an UNECHOIC room, there is no such room my friend. Pls get ur basic right first and then post or else learn from others and then post.

Just because the drivers are perfect in specs does not mean you will get a sweetspot. PLS LEARN SANDEEP. You are digging your own grave.

Rgds

PRithvi
SUB_BOSS
Gesperrt
#43 erstellt: 26. Apr 2005, 06:30
Sivat wrote :







the forum is not intended to discuss business. So please stop discussing this further on the forum...it has already caused lots of confusion and problems.

Please contact Mr. Junia directly...


Sonic master wrote :


yes siva thank you alot. Ive sent personal mail to him and im expecting his mail soon...

yes this forum is going somewhere else...

siva how much the matched drivers costs? the P17 model ? without tax


there it goes again ...c'man wake up.You write something and contradict the same immediately. Sorry for being heavy handed as an IRS..but ...
benkenobi
Hat sich gelöscht
#44 erstellt: 26. Apr 2005, 06:59

sivat schrieb:
Ben,

Can you please let us know which "low" or "mid" end loudspeakers use the P17WJ0008. We would be glad learn this from you.

We know of atleast one model (of an highly reputed
& imported brand) sold in India costing about 1.8 lakhs - using this particular driver. Given my personal budget, it is defenitely not "low" end to me.

Cheers
Siva.


am sorry i meant the entry level or low end of audiophile componetes meaning above the economy speakers(mid end).
i know i made a bungle on the words , apologise for it.
i'll try and get u the refence that i looked up more than a couple of years ago.
i have to make a google search but i'll try and do it when i can.
Cheers,
Ben
benkenobi
Hat sich gelöscht
#45 erstellt: 26. Apr 2005, 07:02
also an anechoic room would not be ideal as sandeep has put it. Prithvi has rightly pointed out that such a thing is nigh impossible.
the other thing is what good is a room without reflections .
in a concert or a live symphony there are alwayss a lot of echos and reflections of sound which actually accenuate the music.Am i right guys?
Chers,
Ben
SUB_BOSS
Gesperrt
#46 erstellt: 26. Apr 2005, 07:05
ya benks see my post in topic Worlds best .....
Sonic_Master
Stammgast
#47 erstellt: 26. Apr 2005, 07:19
yes prithvi im supporting you just drivers will not work out. it needs lots of research and well are u using any softwares for room acoustics I ve heard that u are using?

Ok friend everybody is learner and nothing wrong in that with my knowledge Ive said this...nothing more than that...
jsa_ind
Stammgast
#48 erstellt: 26. Apr 2005, 09:07
Oh dear haven't we got a little tiger cub who so desperately wants to make himself heard !

Just to get the record's right "I think jsa_ind is talking about the imaging( sweet spot) rather than the quality because the major part which impacts the speakers T/S parameters is the sweet spot" I am not talking about imagining...T/S & sweet spots are two totally different subjects.

I think I will sit on the sidelines and watch how this whole saga plays itself out.........................
Sonic_Master
Stammgast
#49 erstellt: 26. Apr 2005, 13:51
I think this is meaningless isnt it??? hmmmmmm
check this link
http://www.ultraaudio.com/features/2004_02_01.htm

I know what means best like i said best in the sense better than many isnt it. ofcourse a guy who own a small taperecorder costs Rs800 may be best to him he says i love the sound i dont need more than that even i dont believe something is present better than that... so best is the one which you love isnt it or anything else...?

according to that ultraaudio.com is junk?

I dont think so...
benkenobi
Hat sich gelöscht
#50 erstellt: 26. Apr 2005, 14:14
Hey sandeep,
u did not get my point at all.
i'm sure the wilson audio alexandria model is as good as the ultrasound people say it is.
but this is a very subjective matter and u only have to take into consideration speakers like the dynaudio master referenece or the acaapella or even the kingdom series of Tannoy and the planar speakers by glacier audio.
u see, there are so many choices even at highest end of audio.
so it is impossible to say 'this is THE best audio system'.
one percievs as he wants to.
Cheers,
Ben
Sonic_Master
Stammgast
#51 erstellt: 26. Apr 2005, 14:32
exactly thats the conclusion that i want to hear from you people
Sonic_Master
Stammgast
#52 erstellt: 26. Apr 2005, 14:45
anyway i want to close this thread now.. as its totally getting deviated...
Suche:
Gehe zu Seite: Erste Letzte |nächste|
Das könnte Dich auch interessieren:
My experience with speakers from Sandeep
bluemoon am 17.05.2005  –  Letzte Antwort am 23.05.2005  –  10 Beiträge
Hi end Hi-fi In India
sidvee am 07.11.2005  –  Letzte Antwort am 12.11.2005  –  20 Beiträge
New to Hi Fi, what should i get?
Little_feet am 02.11.2004  –  Letzte Antwort am 28.12.2005  –  58 Beiträge
Hello all Indian Audiophiles
sidvee am 14.06.2007  –  Letzte Antwort am 18.06.2007  –  18 Beiträge
Sports Car = Hi Fi Speaker
bhagwan69 am 30.12.2007  –  Letzte Antwort am 30.12.2007  –  3 Beiträge
What Hi-Fi: Only Roses, Where are the Thorns?
Neutral am 12.09.2006  –  Letzte Antwort am 15.09.2006  –  8 Beiträge
Hi-Fi suggestions
sanathan am 28.03.2005  –  Letzte Antwort am 29.03.2005  –  14 Beiträge
Midi Hi Fi system
souravin am 16.01.2006  –  Letzte Antwort am 31.01.2006  –  13 Beiträge
Calling all Bombay forum members
Neutral am 21.06.2005  –  Letzte Antwort am 27.06.2005  –  25 Beiträge
Hi fi in Chennai
Neutral am 05.08.2005  –  Letzte Antwort am 08.08.2005  –  5 Beiträge
Foren Archiv
2005

Anzeige

Aktuelle Aktion

Partner Widget schließen

  • beyerdynamic Logo
  • DALI Logo
  • SAMSUNG Logo
  • TCL Logo

Forumsstatistik Widget schließen

  • Registrierte Mitglieder925.427 ( Heute: 2 )
  • Neuestes MitgliedSonny0034
  • Gesamtzahl an Themen1.550.044
  • Gesamtzahl an Beiträgen21.515.415

Hersteller in diesem Thread Widget schließen