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mike100 · 01-21-2014

The schematic isn't complete, but there is tuned L/C on the board- which is more or less tuned to the speaker size. You can't do anything with these except repair them. It's a lot more economical to go aftermarket if everything on the bose has gone bad (there's a tuner box separate or the head unit, then the 4 amps driving proprietary 1 ohm speakers).

As you have no doubt seen on other links to posts, the Nissan units are newer improved versions of the late c4 amps and are a dime-a-dozen and are a cheap way to keep the factory unit going if you like the oem look.

01-21-2014	#20
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Bose Amplifier The schematic isn't complete, but there is tuned L/C on the board- which is more or less tuned to the speaker size. You can't do anything with these except repair them. It's a lot more economical to go aftermarket if everything on the bose has gone bad (there's a tuner box separate or the head unit, then the 4 amps driving proprietary 1 ohm speakers). As you have no doubt seen on other links to posts, the Nissan units are newer improved versions of the late c4 amps and are a dime-a-dozen and are a cheap way to keep the factory unit going if you like the oem look.