One Amp, Two Channels, Two Subs....what to do?

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ripNdeb
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One Amp, Two Channels, Two Subs....what to do?

#1 Post by ripNdeb »

My question is: run the amp harder and parallel the subs on one channel OR take the (single) output of the DCX and put it into one channel and run that channel into the other channel on the amp and run 8 ohms, using both sides of the amp?
I don't necessarily need the other channel for something else but, the question is, lighten the load (amp) or raise the wattage (1 channel parallel)?
The amp is an IPR 3000. The signal chain is mixer, DEQ2496, DCX2496.
2X OTop 112, 3012HO, melded - 2X T39, 27", Lab 12 - XF 212 - 4 DR250, 2 melded, 2 straight
2 20" T39 3012LF - WH10 - WH8 - in the shop - 2 more 20" T39s
http://saltandlighteureka.org still need a trailer :)

Bruce Weldy
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Location: New Braunfels, TX

Re: One Amp, Two Channels, Two Subs....what to do?

#2 Post by Bruce Weldy »

ripNdeb wrote:the question is, lighten the load (amp) or raise the wattage (1 channel parallel)?
The amp is an IPR 3000. The signal chain is mixer, DEQ2496, DCX2496.
Using one channel doesn't raise the wattage per speaker. Putting one on each channel gets you 525 watts each, doubling 'em up on one channel gets 950 for both, or 475 each. Split 'em onto two channels.

6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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bitSmasher
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Re: One Amp, Two Channels, Two Subs....what to do?

#3 Post by bitSmasher »

Here's a quick learning exercise...

http://www.rapidtables.com/calc/electri ... ulator.htm

Rated Power (2 x 2 ohms) - 1,490 watts per channel
= 55 volts

Rated Power (2 x 4 ohms) - 840 watts per channel
= 58 volts

Rated Power (2 x 8 ohms) - 440 watts per channel
= 58 volts

The difference is the current is increased, by having lower impedance. That gives the bigger numbers.
In your case, one speaker per channel will result in the same voltage accross both of them (hence same displacement) as parallel on one channel, but power handling and heat disappation is spread accross both channels - much better for the amp!

ripNdeb
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Joined: Fri Sep 24, 2010 4:57 pm
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Re: One Amp, Two Channels, Two Subs....what to do?

#4 Post by ripNdeb »

Very good; thanks guys
Dana
2X OTop 112, 3012HO, melded - 2X T39, 27", Lab 12 - XF 212 - 4 DR250, 2 melded, 2 straight
2 20" T39 3012LF - WH10 - WH8 - in the shop - 2 more 20" T39s
http://saltandlighteureka.org still need a trailer :)

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