My amp gives out 2 x 750w @ 4 ohms.

I want to get some 6x9s and a couple sub's.

At the moment I have a dual coil 1200w sub using both channels off the amp.

So, if I go for a 6x9 and a sub on each side how do I work out the size of speaker?

Is it as simple as 250w 6x9 and a 500w sub to total 750w??

Or, can I use 750w 6x9 and 750w sub??

Depending on how you wire it, you'll either end up with 2 ohms (parallel) or 8 ohms (series). That will change the power available.

You'll need something to protect the 6x9 as well, wiring them with a sub will push them to their limits before the sub is even troubled.

Personally I'd go for the amp powering the subs on their own, and something like a 100w second amp for the top end. Then you can balance the two.

Was thinking of in series with a low pass filter to the subs.

At 8 ohms the amp is 500w per channel..

If you need a second amp I have a brand new one kicking around in its box. Yours for not very much

Ohms are added when in series. Most speakers are 4 ohm. Subs are often 2 ohm or even 1.

I would not recommend running 8 ohm. Unheard of in my day. the proper way to drive a pair of 6 X9 and sub is off a 4 channel amp. Bridge two channels for the sub. 6X9 can be run very successfully off of the head unit. Dont be fooled by the max watts, the RMS will be half or quarter that.

Hope this helps.

quote:

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Originally posted by coozer
Was thinking of in series with a low pass filter to the subs.

At 8 ohms the amp is 500w per channel..

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quote:

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Originally posted by bi22le
Ohms are added when in series. Most speakers are 4 ohm. Subs are often 2 ohm or even 1.

I would not recommend running 8 ohm. Unheard of in my day. the proper way to drive a pair of 6 X9 and sub is off a 4 channel amp. Bridge two channels for the sub. 6X9 can be run very successfully off of the head unit. Dont be fooled by the max watts, the RMS will be half or quarter that.

Hope this helps.

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