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Acoustic B100 Mk II Combo DOA

K

KeithScud

Oct 9, 2025
2
0
#1
I bought an Acoustic B100 Mk II about 10 years ago. Only used it a handful of times. A friend plugged his keyboard into it. It sounded great for about 10 minutes, and then went dead. That's when I realized that there are no screws to open it up. Is there a fuse in it that might have blown? I read somewhere that it might be the speaker. I also read you can get to the speaker through the front grill. Does anyone have any thoughts on this. Please let me know. Thanks in advance!
 
#3
KeithScud said:
I bought an Acoustic B100 Mk II about 10 years ago. Only used it a handful of times. A friend plugged his keyboard into it. It sounded great for about 10 minutes, and then went dead. That's when I realized that there are no screws to open it up. Is there a fuse in it that might have blown? I read somewhere that it might be the speaker. I also read you can get to the speaker through the front grill. Does anyone have any thoughts on this. Please let me know. Thanks in advance!
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The Guitar Center Acoustic bass combo series really are good sounding, inexpensive amps, but unfortunately they're not known for their reliability.

It is repairable but at today's prices to have a qualified amp tech to diagnose and make repairs, you're probably going to be money ahead to either find a working used one, or buy a low power bass head and use the Acoustic as speaker cabinet, or better yet, go to your nearest GC, trade in the old B100 (I've no idea what they'd allow you for it), for a new one with a warranty.
 
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#4
Without knowing what failed, replacing parts based on what you read isn't likely to fix the amp and will cost more than the amp is worth in the process.
 
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#5
agedhorse said:
Without knowing what failed, replacing parts based on what you read isn't likely to fix the amp and will cost more than the amp is worth in the process.
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It's a shame, I only turned it on a few times, and it's never been abused in any way. I guess it's just Chinese garbage. I have a SWR 15" cube amp, that I never use. That's small enough for the bedroom. I just thought maybe I would try to fix the Acoustic. I'm mostly a guitar player. I bought the amp because it was small and friends could jam with it in my small bedroom studio. I usually just record bass direct. I have all kinds of bass amp plugins for that and then there's no bleed.
 

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