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Single amp system?

Old 11-04-2006, 05:30 PM
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Single amp system?

Would it be a rediculous idea to try to build a single amp system to push a ~300rms woofer (10/12") + likely four 6inchers... Which would be kickers and rear deck behind the seats (in a coupe). Im not sure if there is anything in the dash... (1993 Del Sol).

So I was thinking of grabbing a A/B MB Quarts Raa4200 (in forsale section). I dont know what voltage the ratings were taken at... but its: RMS Power (4 ohms) 100 watts x 4 chan.
I was thinking of briding two channels mono headed towards the woofer (so 400x2 @ ....4ohm
Ive yet to pick a woofer at the moment... however 400rms will be plenty of juice in this little coupe for the woofer I pick... Im thinking of an AVI SL250 or perhaps a TypeR1041. Both would be SVC to match the amp.
As for the other channel-- it will be divided amungst the other speakers.

Is this practical? Will the channel im sending to the components be sterio?
If not, would it sound like ? I dont want to buy nice components if I will be recieving junk noise from them.

Again, im not stuck on any specifics here... Just thoughts. However I want something that sounds pretty decent. I would rather stick to a single amp if possible. Just to stay away from all the extra cost incurred (distro, extra wiring, 2nd amp... you know?)

Does anyone on here have/know someone who runs a single amp on a respectable setup?

I would assume A/B amp on a woofer isnt the coolest idea, but then again... I dont know that much about audio.


Im open to any suggestions my new setup.

Thank you.
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Old 11-04-2006, 05:40 PM
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Lightbulb

I have heard quite a few single amp systems over the years....those systems with a 4 channel amp have not suffered acoustically, but there are going to be flexibility issues. If the comps are run at 2ohm stereo, the only way to fade from front to rear requires an outboard pot to lower the level for 1 of the pairs of speakers. If the sub is wired across the rears in a tri-mode configuration, it will be tied to the level of those speakers and may suffer from a lower output than desired.

If I was going to do it myself, I would definitely look into a 5 or 6 channel amp. They have enough crossover and EQ functions built in to them to eliminate the issues mentioned above, and the newer ones have enough output power to take care of most people's needs.

HTH
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Old 11-04-2006, 05:50 PM
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My favorite systems to design are based around 5 channel amplifiers. They are for the person who is after a good stereo that plays to a respectable volume level. My favorite amp for this task is the Eclipse XA5000, 50w rms x 4 and 450w rms x 1. This is more than enough power in your little car. Saves install time and space, saves on wiring, gets rid of a possible bad grounding point between multiple components. I think that this is the best way for you to proceed.
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Old 11-04-2006, 06:27 PM
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Great. Thanks for the quick replies.

Im curious though, the MB Quarts amp that I mentioned is twice the power of the Eclipes you have suggested... they are both four channel aswell.

Why suggest something lower powered?

Thanks again
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Old 11-04-2006, 08:38 PM
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What makes you think you need this much power in such a small space with a limited amount of current produced by the alternator? A good system is a good balance of power. In that small of a space, the amp I am mentioning is way more than enough to get substantially loud.
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Old 11-04-2006, 08:54 PM
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You could always get that Quart Raa4200 from battyrida and get a raa2400 from onlincecarstereo.com, they have the 2 channel for210+14$ shipping(US), thats an awesome price for so much power.

You might also look into the memphis belle 5 channel, thats probably more your style. You get 75watts x 4 for your highs and 1100 watts for your sub.

However I will agree with the previous poster, that eclipse amp would probably give you all you want in terms of power.
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Old 11-04-2006, 08:56 PM
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Never Mind. Brain fart

Last edited by Brad-S.A.; 11-04-2006 at 10:07 PM.
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Old 11-04-2006, 09:50 PM
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Im not really in the position to argue with you.. However I think I would have to disagree with the above power statement...at least till someone can explain to me:
MB Quarts= 100 x 2 into 4 ohms + 400 x 1 into 4 ohms (bridged mode).. ([email protected])

The Eclipse pushes 50x4 + 300x1 @4ohm...([email protected]) However if you bridge it the power seems to drop off?
Bridging the Eclispe you get a mere [email protected] + 300x1

Correct me if Im wrong... Im just trying to learn-- or see it how you guys do.

Thanks for your patience
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Old 11-04-2006, 10:06 PM
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Originally Posted by Turcotte
Im not really in the position to argue with you.. However I think I would have to disagree with the above power statement...at least till someone can explain to me:
MB Quarts= 100 x 2 into 4 ohms + 400 x 1 into 4 ohms (bridged mode).. ([email protected])

The Eclipse pushes 50x4 + 300x1 @4ohm...([email protected]) However if you bridge it the power seems to drop off?
Bridging the Eclispe you get a mere [email protected] + 300x1

Correct me if Im wrong... Im just trying to learn-- or see it how you guys do.

Thanks for your patience

Opps ya sorry thought that was the power at 2 ohms on the MBquarts. Ya so its roughly the same power as the Eclipse does 450 on the sub side according to MR2NR. So to anwser your question yes the RAA4200 would be plenty of power.

Last edited by Brad-S.A.; 11-04-2006 at 10:08 PM.
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Old 11-04-2006, 10:26 PM
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The RAA4200 is lots of powerr, bridge it and yu get 400watts for the sub otuput, thats enough for most any application involving listening to music.

the other 2 channels, 100watts per component is lots... you could put to paires of component sets or get a 2omh set and you have all the pwoer you ever need really for daily use.

Plus the MBQ is sexy
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