Fault finding a Studiomaster Drive 12A

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   Hello,I have a faulty Studiomaster Drive 12A active PA speaker which is not working as it should and am looking for advice on how to fault find.

Symptom: no output from either driver
State: powers on, lights on rear - all three are solid on: power / signal / clip

Steps taken so far:
- checked fuse - ok
- no visible damage to the speaker unit or rear panel
- no water damage
- removed rear panel to visually inspect for loose wires or obviously broken/blown - components - all ok
- removed speaker cables and tested each using the battery test - both ok
- input jack looks to be ok but is a sealed unit (?) and can't see much of anything.

I've not been able to find any similar issues on the web - google was for once, not my friend.
Studiomaster website is not very helpful - specification of the speaker is available but nothing else and no documentation about resolving faults. 

Its a fairly new speaker but outside of warranty so before I have to give in and buy a new one, I'd like to try and fix this.
Its been stored inside and away from damp.

With multimeter at the ready, I am grateful for any advice or guidance here!

thanks in advance,
PTDyn2024

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PTDyn2024 Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 05 January 2024 Location: Shropshire Status: Offline Points: 2	Post Options Post Reply Quote PTDyn2024 Report Post Thanks(0) Quote Reply Topic: Fault finding a Studiomaster Drive 12A Posted: 05 January 2024 at 8:58am
	Hello, I have a faulty Studiomaster Drive 12A active PA speaker which is not working as it should and am looking for advice on how to fault find. Symptom: no output from either driver State: powers on, lights on rear - all three are solid on: power / signal / clip Steps taken so far: - checked fuse - ok - no visible damage to the speaker unit or rear panel - no water damage - removed rear panel to visually inspect for loose wires or obviously broken/blown - components - all ok - removed speaker cables and tested each using the battery test - both ok - input jack looks to be ok but is a sealed unit (?) and can't see much of anything. I've not been able to find any similar issues on the web - google was for once, not my friend. Studiomaster website is not very helpful - specification of the speaker is available but nothing else and no documentation about resolving faults. Its a fairly new speaker but outside of warranty so before I have to give in and buy a new one, I'd like to try and fix this. Its been stored inside and away from damp. With multimeter at the ready, I am grateful for any advice or guidance here! thanks in advance, PTDyn2024

Andy3951 Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 13 November 2025 Location: Wiltshire UK Status: Offline Points: 1	Post Options Post Reply Quote Andy3951 Report Post Thanks(0) Quote Reply Posted: 13 November 2025 at 3:06pm
	Hello, I just stumbled across your post and wondered if you ever got anywhere with the speaker? I also have a Drive 12A that has gone faulty and I'm looking for a circuit diagram so that I can fault find. Thanks, Andy (in Wiltshire)