Acoustic B450 MKII - what's inside?

[Ivy Mike]

I pulled the head out of my Acoustic B450mk2 the other day to have a peak. Turns out it's the same power amp as the older B600H but has a slightly upgraded preamp and a crossover of some type to handle the horn in the combo unit.
Of interest though, is the transformer which reads Part Number:Groove 600HD.
I wonder if these were made in the same Chinese factory as the Kustom Groove 600HD, or maybe they just had a bunch of parts leftover and didn't feel like changing the label.

Anyway, enjoy!

 

[BooshBass]

I pulled the head out of my Acoustic B450mk2 the other day to have a peak. Turns out it's the same power amp as the older B600H but has a slightly upgraded preamp and a crossover of some type to handle the horn in the combo unit.
Of interest though, is the transformer which reads Part Number:Groove 600HD.
I wonder if these were made in the same Chinese factory as the Kustom Groove 600HD, or maybe they just had a bunch of parts leftover and didn't feel like changing the label.

Anyway, enjoy!


View attachment 2574864 View attachment 2574865 View attachment 2574866

I'm bringing this thread back to life because you seem to know things about amps and this amp in particular. I'm about to go pick one of these up for free off craiglist. It's free because it buzzes. Bass comes out, but buzzing when powered on. Free is free and buzzing could just be some loose wire or something that's easily fixable. Any insights on what perhaps common problems might make this bass buzz?