I have a 96 Honda Accord. I am running a 4 channel Power Acoustik amp to 4 Boston Acoustic speakers (2 6 1/2 in front/2 6x9 in the rear). I am also running an old school Orion 2150 to two Pyle Pro Woofers. I have both amps running off of the RCA preamps (they are connected with "y" connectors). The 4 speakers running off the four channel are doing fine, all balanced. However, when you have the Pyle's balanced they have almost no power and pretty much are all voice. When you balance the system to the right or left, the applicable woofer regains power and hits as it should. You rebalance the two woofers again and they cancel out once more with no bass coming from either?
Any ideas what may be wrong?
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Chestercheez
keep the HU at 0 balance or get a HU with F,R and SUB out and replace the splitters with 3 sets of RCAs.
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Woofers are wired out of phase with each other. Reverse the wires on one of them. This should put these subs in phase so that when they are both receiving a full signal they will play properly with each other.
After that, look on the sub amp for a switch that reads "180". This will switch the overall polarity to the set of subs so that you can find the best phase with the rest of the sound system. If the amplifier doesn't have such a switch, you can just reverse the wires connected to the speaker outputs to reverse the sub phase. Use the position that makes the bass sound most dynamic and deepest while listening from the driver's seat.
So it's: 1. Make sure the subs are in phase with each other.
2. Make sure the set of subs are in phase with the system.
If this doesn't do it, the problem could be in the RCA inputs and the way you have them connected. Plug the set of RCA's directly to the sub amp, leaving the other amp disconnected and the Y splitters temporarily out of the picture, to make sure the subs are functioning properly.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Stevdart:
You the man! I don't understand the science behind it but the subs are hitting again. I had the sub setup ran the same way before the addition of a new head unit and a second amp and it ran fine? I didn't change the set up of the sub amp or woofers at all but it changed the way they responded? What you suggested about the switching of wires on one sub worked. The Orion has no "180" switch. I'm not sure if the woofers are "in phase" but they are sounding pretty good.
I'd buy you lunch and a beer if I knew who you were. Thanks again.
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Chestercheez