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Discussion Starter #1
Does anyone know the correct way to set up 4ch amp for speakers and 2ch for subs, i am trying to get my system louder but cleaner, i have good infinty components up fronts so powerhandling shouldnt be a prob. i dont want to vlow the subs though, the amp MTX 8100D could blow them easily so those are my guidelines..........
 
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Let me know if I get this correct. You have a 4 channel amp and you want to drive the front speaker with one set of channels, and two subs with the second pair? With this, you want the loudest possible.

If that is the case below is what I would do:

Use two sets of RCA cables for the front and sub inputs into the amp. If the amp has a Xover, set them to the proper settings. Next, unplug the sub RCA's and get a CD you like that can be played loud. Adjust your amp gain all the way down, turn your deck's volume control up about 85%. The adjust your amp's gain until you can hear clipping. Back off the gain just a tad. Do the same with the sub (after unplugging the RCA's for the front), leaving the volume in the same place. This will yeild a system that will allow you to play all the speakers as loud as they can, without having one set fail before the other.

Another way to get more volume is to bridge the amp. This is where you combine the left and right channels on the amp to effectivly double the available power. If your amp can handle a 2 ohm bridged load, wire your speakers so that both positive speaker leads go to the right "+" and both the negative speaker leades go to the left "-". This will give you the most power to drive your subs. BUT YOUR AMP MIGHT NOT BE ABLE TO HANDLE IT, SO CHECK YOUR MANUAL. Also, cooling will become manditory because the amp will need to disapate a lot more heat.

Another way is to get more speakers.

Thats all for now,
TOM B
 
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Discussion Starter #3
I heard of that method, i think thats what i need to do, but what i meant above is that i have a 4ch amp powering all four speakers inside and another 2ch just for subs. i guess it would go the same for both of them, to get the best results i should dissconect one when doing the other???it makes sense.....
thanks,
 
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The point of disconnecting all the other speakers is that you don't want one set of speakers masking others. Your speakers will start to distort at some point in the gain setting, and if you have other speakers playing at the same time, you might not notice it. This way, you can adjust all your speakers to reach thier limits at the same time.

As for the separate 2 channel amp powering the subs, read up on it and see if it can handle a 2 ohm load in the bridged mode. If it can, you can wire your two subs in parallel and get the most power possible. This is of course considering your subs are each single voice coil 4 ohm speakers.

Thanks,
TOM B
96DGGM
 
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Great info, thanks thats what i was thinking, I am all set, Thank you so much for the help. Hope it helped someone else too.....

Later,
 
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