Comments on: Need help with a car amplifier?

By: MITCH

MITCH — Wed, 09 Jan 2008 20:51:10 +0000

Since your amp rms power @ 2 ohms is 850 w x 1 , connecting the 4 ohms subs in parallel will make the amp see a 2 ohm load on its output. (in other words is like having connected only one speaker of 2 ohms consuming all the power) Lowering the impedance of the load, makes the amp deliver more power. That means that each sub will be consuming about 425 w rms of power EACH. That’s the best configuration for you at the moment.

By: john s

john s — Tue, 08 Jan 2008 16:14:10 +0000

With these two woofers hooked properly (in parallel) to this amplifier, it will produce 850 watts, which will be divided equally between the two woofers, or 425 watts per woofer. Using the information that you give I have to guess that you either have the 12″ or 15″ comps. If you have the 12″ subs they won’t handle this amp because even though it says 500 watts max, they only handle 250 watts RMS each. If you have the 15’s then they will handle this amp since they handle 500 watts RMS.
Also, this amplifier is a single channel class D amplifier so it can’t be bridged since bridging an amp is hooking it up in a manner so that a two channel amplifier becomes a single channel amp.
Also, Maximum power of most amplifiers is whatever number the manufacturer decides to make up. The only numbers that matter are the ones that say “this many watts RMS @ this ohm load @ this distortion level”. Max power watts are the same as the easter bunny and lepechauns. Myths.

By: Tumpy

Tumpy — Mon, 07 Jan 2008 04:01:25 +0000

You need to wire the subs in parallel this will take the impedance down to 2ohms. This will give you 850 watts for the channel which boths subs will be wired to. This is also known as bridging. to do this connect a jumper wire from the positive terminal on one sub to the positive on the other sub. Also connect a jumper wire from the negative terminal on one sub to the negative on the other sub. Then connect the positive and negative on one of the subs to the output on amp. Note that this amp has the capability of 1700 watts so you need to make sure your subs can handle that many watts. You might want to check out the woofer wiring wizard at for further assistance.