Bridge Amp?

Hi,

I have a 2 Channel Jensen 80 watt amp.
I wanna use it to power my single Jensen 400 watt 10" sub.
How do I bridge my amp? I have lost the owners manual so I dotn really know how. Also is it normal for a amp to get really hott?
My amp can be found at http://www.millionbuy.com/jenrgca1100.html
I dont know if its bridgable.

Thanks

Nope doesn't look like it.

You can bridge it, but the problem with the amp is that your sub is trying to pull more power than the amp can handle. That is why your amp is heating up really hot. The amp you have will never fully power that sub. The most you'll get is 80 Watts out of that amp, and that's if you run at 2-ohms. You'll only be pulling 40 watts from the amp, since when you bridge it goes to Max 80 x 1 @ 2-ohms, but your sub is running at 4-ohms making it 40 x 1 @ 4-ohms. If the sub runs at a different ohm rating then let us know and we can better help you.

LOL ..... a 500 watt sub does NOT pull more power from an amp than say a 250 watt sub. What is overheating his amp is bridging it ... each channel is now "seeing" a 2 ohm load, and so it tries to push twice the current.

I didn't say it WAS pulling more power, I said it was TRYING to pull more power THAN THE AMP COULD HANDLE! Big difference.

Do not run this amp with any 400 watt speaker. You are going to blow your speaker. I looked up your amp and it is a $20 amp. It is 2x40 watt peak, which means it is 2x20 watt rms. This amp does not have sufficient power to drive the sub and it will damage your sub if you turn it up too much. A couple notes of correction.. The only way a sub can draw more current from an amp is when the impedance is less. For example, a 2-ohm sub draws more current than a 4-ohm sub. The increase in current is exactly the reason why you get more power from the amp at 2-ohms. The other thing to note is that when you bridge an amp, it does not make the impedance 2-ohms. The only way to make the amp 'see' 2-ohms is to run two 4-ohm speakers in parallel. When you bridge an amp you are basically combining the power from both channels.

Do not bridge that amp.

To bridge an amp, you usually run a negative wire from one channel and the positive from the other channel. Sometimes this differs by manufacturer.

Some good information about wiring amps and speakers.
http://lalena.com/audio/faq/wiring/