Not your run of the mill Mach 460 issue

96Mystic1189 · May 28, 2018

Guys I seem to have the opposite problem as everyone else when it comes to Mach 460 issues.

Both of my rear amps work fine because I get sound from the front and rear mid range woofers. My issue is that I only have my front tweeters working, the back tweeters do not work. It cant be the head unit because it is obviously turning on the amp in the dash because I have front tweeters. Anyone ever had a front amp go bad in a way like this?

evilcw311 · May 28, 2018

True soundstage is created with no rear fill. Upgrade your front speakers and let the rear tweeters stay off.

Trust me, you wouldnâ€™t notice much even if they did work.

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ttocs · May 28, 2018

if you swapped out the deck and didn't cross over the tweeters more then likely they are blown. To find out you will need to test them with a ohm meter.

96Mystic1189 · May 28, 2018

ttocs said:
if you swapped out the deck and didn't cross over the tweeters more then likely they are blown. To find out you will need to test them with a ohm meter.

Am I correct that the dash amp controls all 4 tweeters?

ttocs · May 28, 2018

it powers them but if I am not mistaken the signal was split and crossed over prior to the amp.

96Mystic1189 · May 28, 2018

ttocs said:
it powers them but if I am not mistaken the signal was split and crossed over prior to the amp.

Ok previous owner installed the head unit, I should probably go over his install.

96Mystic1189 · May 28, 2018

Is one of the pre-amps from the special mach harness for the tweeter am, or are both of the pre-amp connections for the back amps?

ttocs · May 28, 2018

it splits somewhere in the dash harness and goes down to the tweeter amp in the dash. I normally just bypassed the amp and hit the bypass harness and then installed a 1000 microfarad capacitor that took the bass out of the tweeters.