My HST has the full Alpine system - but I'm thinking about adding in a bigger subwoofer. To do that, I need to find the main Amplifier so that I can get a bass signal feed from it. Anyone know where the Amp is installed - can't find it anywhere!

It's on the right side of the trunk, above the subwoofer speaker, on the vertical wall.
See: https://www.freel2.com/gallery/albums/user...arness.pdf

But I am affraid you won't be able to obtain a line-out audio for your additional subwoofer, because all audio informations are traveling in digital form through the MOST network.
Maybe just by taking the audio information directly from the speaker, through a resistive divider network.

Last edited by alex_pescaru on 17th Nov 2009 3:45 pm. Edited 1 time in total

this spaghetti might help good luck

https://www.freel2.com/gallery/albums/user...iagram.pdf At work
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Thank you alex_pescaru and chicken george!