A small technical confusion

Under normal connections of one speaker per terminal you need not worry as rating of resistances is per channel of the amp. hence it means that you can connect 6 Ohms per channel !

If you had connected both speakers to the same terminal of the amp, it would be Impedences in parallel hence the impedence of 3 ohms

cheers

Got tht Arj! Thnx. so basically my amp is having a hrd time driving the speakers..do you think i would get better sound quality if i have independent amplifiers for the speakers?

When you say sat-sub combo what do you mean?

Are you connecting the cables from your speaker terminals on the amp to the sub and then the Sats to the outputs on the sub or connecting them both to one terminal?

If it is a powered sub and your preamp/proc is doing the bass management it is a different story.

Unless you are connecting both cables to one terminal, most decent subs should have a crossover that impedence matches an presents a decent load to amp.

Yes, i'm connecting both the cables to one terminal..

sat- sub means satellites and sub-woofer..the sub i have is passive.

Yes, I know what Sub-Sat means. But what you are doing isn't the traditional meaning of Sub-Sat.

Most sub-sat systems have high-pass outputs to the satellites from the sub crossed over at a frequency, even passive subs. Such a system would match impedence to give the amp an easy load to drive.


The way you have it setup is pretty bad for the amp and mainly for your speakers, if you drive the Amp into clipping. Or your amp overheats and fries or shuts off if it has protection.

You might want to get an external active cross-over or two amps. You didn't mention if how you are doing bass management. Is your preamp/proc capable of any bass management?

Hi,

Thnks for your inputs! well, my preamp (pulz) has a builtin crossover switch for the hi pass and low pass freq. hence, i'm buying another amp for the reasons you very well cited. the new amplifier is of technics (model no. SE-A1000, launched in 96). i was suggested by other members in the forum tht the technics specs were not so good for subs, hence i'm plannin to route the pulz pre-power to the subs and have the technics (pre-power) drive the sats....any comments?!!

That sounds like a plan. The only thing I would suggest is level matching the two amps. I don't know how easy it is for you to get your hands on an SPL meter.

But you can go to realtraps.com and download a set of tones to do frequency sweeps. You would probably want to match them to a certain db at thier respective frequency ranges using the Amps gain controls if it has them.

Hey man...now you are talking russian..

I am sorry. My only concern with you adding an amp is level differences between the two.

Say you use the technics for the sats and it is as bad as people say it is the bass will overpower the mids and highs. Doing so might mess up your sats imaging and soundstage and also muddy the vocals. The other way round would have the opposite effect.

So level matching would be the best bet. Or get a subwoofer amp and make your passive sub an active one.

Something like this:
http://www.madisound...6237134.5488&pid=449

If you notice all the knobs, they will allow you to set the sub to crossover at a frequency and also set the volume.

Do we get sub-woofer amps?

In india i'm not sure if thrs such a thing available...

Hi Neckie,
what oarnura is primarily talking about is the gain difference in the two amps.

what you would be having in your planned setup is
Preamp 1 connected to the technik for the Subs qnd to the Pulz for the Sats.

since the volume control is going to be via the preamp, a change in volume should have the same result in both amps. but since the gain/rating/tone of the amps are different, a 3db increase in the satellite may not have the same impact on the sub. hence your sound not being too good. that is one probles with passive subs>

Does your passive sub have 2 pairs of Speaker in and speaker out terminals ? Many subs do> In that case you can connect both the out terminals of the amp to the in terminals of the Sub and then connect the sats to the sub.

If you do not have that, then instead of a power amp get a intergrated amp with a Passive preamp inbuilt.

now you can connect your sats to your current power amp

the sub to the integrated and the integrated to the pre amp

if keeping the volume constant in the pre and hence the sats adjust the volume of the sub so that it matches ie you have adjusted the gain.

This is not as easy as it sounds and may take ages to adjust the gain and you might still have some differences in the tone.

hence the better option might be to get an active sub

Hey Arj!
sounds interesting!

guys the deal got sour with the chap from delhi, he was atleast honest enuff to say tht the left channel is not workin and tht he wud let me knw whn it's up anf runnin smooth, i would not like to take a risk, if anyone's interested in this lps let em know i would forward you his contact details.

Hey Arj, pulz has integrated amps but it's 30+30 watts and my power amp is 60+60.in tht case how woud you chart the setup. i dont think it wud be thn workable, right? pls let me know.

one more problem guys/// off late my amp is giving a loud clipping sound after half hours play at half it volume...is it bcoz of the impedance issues...? but wondering why it did not give me this problem all this time......

Looking forward to your views....

neckie schrieb:

Hey Arj! sounds interesting! one more problem guys/// off late my amp is giving a loud clipping sound after half hours play at half it volume...is it bcoz of the impedance issues...? but wondering why it did not give me this problem all this time...... Looking forward to your views....

Depends, were you playing the same music when it clipped and didn't clip. There are songs with enough dynamic content ecspecially in the lowend that can cause you amp to clip. Say a 20Hz signal went to your speakers, the woofer could cause a huge strain on your amp. You may not hear the signal but the woofer will try to reproduce it. Now if your impedence is halved your Amp might clip.

Hey, thnks for the input,.... i'm really worried to play my current setup now...any chance i could blow up my speakers or my amp...i didtn hear any difference in sound, do u think i shld still service my system....?

neckie schrieb:

Hey, thnks for the input,.... i'm really worried to play my current setup now...any chance i could blow up my speakers or my amp...i didtn hear any difference in sound, do u think i shld still service my system....?

Can you restate the problem you have exactly? There have been too many iterations and the problem is now a haze.

Describe what the difference is now and before in terms of sound. how much did you have to crank the volume up to get the listening levels you wanted.

the amp is an 60+60 watts dual mono. i got this piece almost 5 months back. th thing worryin me is the unpredictability at which this loud clippin sound occurs, usualy twice back to back, heard after half n hours play at slightly over half the volume. like is said, i donot hear a diff in sound whn i play my amp therafter at a lower volume. wht surpises me is tht i never faced this problem until recently. could this clipping sound damage my speakers, am i riskin blowing my amp?

i'm runnin my cd plyer thru a pre-amp-power combo, which instead is being connected to two satellites and a passive sub both these have an impedance of 6 ohms. and the lowest adviced impedance suggested in the manaul (amp) is 4 ohms. they did mention tht runnin my amp in a setup like this could damage the amplifier. however i was told by the speaker manufaturer(i have locally made speaker's by Pandam) that this is not a problem and tht i could run all my speakers in the above mentioned setup.

do you smell foul play, kindly advice.

also, would you suggest ways i could pwer my subs(two 5 1/2 inch drivers) do you think i shld go in for a powered sub instead? if yes polk audio is the one tht wud come in my budget. woudl a 8 inch sub/ 100watts be good enuf to pump air in an 11/12 room....?

Sorry I had you confused for the person who had the reciever problem.

Anyway, your speaker manufacturer is wrong. I would discontinue the use of that passive sub. Infact that thing isn't a passive sub as far as I am concerned just a woofer in a box.

Get a decent powered sub even a 8 inch polk would do a lot better than two 5/12 inch drivers driven by a struggling amp.

Thnks a ton for the inputs. i was in doubel minds as to power my passive with another amp. but ounds like getting apowered sub would make much more sense as it is specifically designed for the purpose. thnks bro, i'll chk out my options during weekend and let you know.Thnks again!!

Neckie, It's quite clear I have the same amp as yours. Never experienced any clipping so far. But I only have them in a 100 sq ft bedroom. So they don't play loud. Never above 70%.

A basic question. Why do you want to use a subwoofer? It's not necessary for music. If there is a clipping problem, write to the Pulz people pulzaudio.com. Your amp is still under warranty. They may give you the best advice. If you insist on a sub, power it separately as advised. One amp channel can't drive two speakers. Too much load. Any amp would clip!

i got the subs, coz i listen to loads of trance stuff and pop. these kinda music need tht thump, and pulz delivers it beautifully. i honestly do not feel i made a wrong choice. also, i'm in this situation as i was mislead by pandam tht i could run all these speakers in my current setup. whereas the pulz guys strongly suggested not to.

Hi Neckie,

I am a little confused about your sub-sat combination. Isn’t it a purpose built integrated system where the passive sub has inputs for connections from the amp and outputs for connections from the sub to the sats?

Doesn’t the sub have a built-in crossover which diverts the high frequencies to the sats, retaining the low frequencies for the sub’s woofers?

Or, are the sats and subs independent of each other?

Cheers

yes, the subs has built in crossovers to divert the higher freq to subs.but a it i s not possible for me to coenct my speakers this way. prashamt suggested i go for parallel connection. he said it would not deliver any noticeble difference.

Why is it not possible for you to connect the speakers to the sub?