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Old 2nd October 2007, 06:50 PM   #1
diyAudio Member
Join Date: Mar 2007
Default Help with HU amp

Do the head unit amps work like any other amp. EX. four postives for the speakers share the same negative?
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Old 2nd October 2007, 07:51 PM   #2
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
No. All of the negatives are isolated for amps rated to produce more than ~5 watts into 4 ohms. In a standard head unit. There are actually 4 bridged amplifiers. The negative speaker wires have signal on them.

In most bridgeable amplifiers, the negative of one channel has signal and the positive is actually ground.
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