Need help tuning a amplifier.

[denali804 10+ year member]

Check input voltage range switch.

 

[denali804 10+ year member]

If using speaker level inputs to amp. Have the switch in the high position. Also Where are you tapping the speaker wires in that maxima bose system. Depending on where your tapping you might not be getting a full signal in. Your bose has a crossover and if your tapping door speakers its probably not gonna have much sub freqs. Might have to tape at rear speakers or factory sub.

 

[I VIK I 10+ year member]

Tapping into the rears.

 

[boomzilla 10+ year member]

Also, alot of bass settings in your H/U will up the voltage a little bit.