m1kezz Posted October 10, 2024 Posted October 10, 2024 Hi all, not sure if this is being posted in the right section, admins move/delete if not allowed Ran into an issue with my subwoofer which seems to be shorting out and popping the fuse each time. Tonight as I was testing the 3rd fuse, it sounded like there was a crackle/zap sound coming from the sub alone for a second or two then the power cut. Prior to that the sub was working as normal. My question would be where would I start to look at what the issue is? Iam assuming it might have something to do with the amplifier/bash plate. I've tried another power point & power cord with no success. Haven't changed out the RCA cable or tried a different amp. The setup was working fine for years before this randomly happened. Subwoofer: PSB Subsonic series 1 Yamaha 3065 amplifier
Grizzly Posted October 10, 2024 Posted October 10, 2024 There would be an internal fault which is causing the fuse to blow- unless you're a trained and/or experienced tech I'd suggest finding one and having it looked at professionally 1
Full Range Posted October 10, 2024 Posted October 10, 2024 The PSB subwoofer has its own power supply So the problem will be that a component has failed in that power supply and needs to be serviced 1
m1kezz Posted October 11, 2024 Author Posted October 11, 2024 @Full Range @Grizzly Thought that would be the case, thought I'd ask for some advice in this situation incase it may be something external causing it to pop. I definitely won't be looking to repair this myself. Would you guys think this would be a worth while fix or should I utilise this opportunity for an upgrade
Full Range Posted October 11, 2024 Posted October 11, 2024 5 minutes ago, m1kezz said: Would you guys think this would be a worth while fix or should I utilise this opportunity for an upgrade It’s prudent to judge the cost of repairs against the cost of an upgrade and what you can afford Research is your friend and the most prudent choice Don’t purchase anything just because you can, but what it can do for you 2
mbz Posted October 12, 2024 Posted October 12, 2024 The subwoofer probably has a single channel power(only?) amplifier and supporting power supply (+/- rails). You are getting surges/spikes/... in dc voltage probably caused by a transistor or cap or... breaking down/leaking. The culprit could be in the power supply or the power amp stage. Since the amp is rather simple, fault finding is reasonably straight forward (with the required tools). You would be looking at a tech and 1-2hours work though this depends on accessability/build. Some people with skills would diy. The sub appears to be a budget item so cost prohibitive to repair. After thought, sub may use a class D amp which IMO would complicate repair/costs
audiofeline Posted October 13, 2024 Posted October 13, 2024 FYI, it might help to have a more descriptive title for the title, "Help" is very generic. A title like "Help with subwoofer blowing fuzes" would be more likely to attract useful replies, and also help others searching the archives for a similar problem. I've had hifi equipment that blows fuses in the past, very frustrating. I hope you get a solution and your sub behaves itself in the future and you can enjoy the music.
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