two channel amp three speakers

Hi,

Many years ago I had a setup for the rear of my car that consisted of 2 16x9s in the post and a single sub in the hatch. It was powered by a single 2 channel amp using a 1 choke and 2 caps to filter the frequencies to the correct speakers.

For the life of me I cannot remember the exact wiring of this setup. I have a graphic of how i think is how it was setup. Will this work or short the whole thing out?

I know this is not the best setup, but back in the day it worked and sounded pretty good.

The setup back then was 16x9s with a 10" single voice coil sub if that makes any difference.

That's not a standard tri-mode setup.  In tri-mode the sub (or woofer) is connected as a bridged load, not between the two positives (which will generate a signal, but only the difference between the stereo sides.  This is commonly used to wire a full-range speaker as a center channel on amps that can handle it.)  If your amp is bridgeable (or if it is called "Tri-mode capable") use a woofer with a high enough impedance and bridge it (generally left positive and right negative.)  Use a simnple first-order crossover as you have depicted and make sure you match the knee frequency for both high and low pass.

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Thank you for your reply. I will go look that up.

I adjusted my illustration to be a tri-mode one. This must be how it was setup. When I bought the amp I had the 16x9s and was given the sub. So I told him what I had and what I could spend and went home with an amp, two caps, and a choke.