[electricroo]

This is what I ended up doing. I've got a stash of different heatsinks. The first heat sink I though was going to fit behind the speaker was almost perfect. I didn't want to modify the chassis to make it fit because if I happen to find another speaker assembly down the road I would want to be able to convert it back without a hacked up chassis. So I'm mounting a larger heat sink beside the chassis. Two holes in the bottom of the cabinet and one in the side of the chassis. Monted the Tip50 leads and wires on a small piece of single sided copper perf board then coated connectors with urethane conformal coating then heat shrink. This way i     t would be easy to remove and install an original working speaker if I came across one. And thank you for the help!