M25 problem..

Mackenzie · Post by **Mackenzie** » Thu Jun 05, 2008 1:54 pm

Well my m25 just arrived in yesterday, and it sounds great, but sometimes it will randomly just start making a real loud hissing noise. I was forced to turn my deck off quick for fear of blowing my tweets. I disconnected the rcas, and still got hissing, and I also checked the ground, which seems to work just fine for the other amp I was using before this one.. Any ideas what the problem could be? Faulty/ old electronics on the m25? Note this amp still has the oem caps, and parts, as I just bought it fom someone. Ive never ran into an issue like this ever.

Post by **stipud** » Thu Jun 05, 2008 2:04 pm

Caps may be shorting out. I would definitely replace them on ANY M/MS series that hasn't had the treatment yet. The M series is SO easy to do, you really have no excuse not to

Other than that, look for loose wire traces shorting things out. Try connecting a test speaker off of some short wires in the trunk, to rule out a short in your speaker wires. Look for any visible damage or loose parts in the amp when you change your caps.

Mackenzie · Post by **Mackenzie** » Thu Jun 05, 2008 2:40 pm

^^ will do.. I mainly just wanted to test it, as I just bought it.. In the pos kenwood goes unti i get my m44 back, and get his m25 problem adressed

nutxo · Post by **nutxo** » Thu Jun 05, 2008 3:33 pm

Mackenzie wrote:^^ will do.. I mainly just wanted to test it, as I just bought it.. In the pos kenwood goes unti i get my m44 back, and get his m25 problem adressed

Is this the one you bought at anandtech?

Mackenzie · Post by **Mackenzie** » Thu Jun 05, 2008 4:49 pm

nutxo · Post by **nutxo** » Thu Jun 05, 2008 5:03 pm

Mackenzie wrote:yes

Im sure the guy would give you a refund. He has really good references.

Mackenzie · Post by **Mackenzie** » Thu Jun 05, 2008 6:03 pm

Well I plan on getting new caps anyways, because im going to be running this and my m44 daily hard, so yea... The amp sounds dam good though, despite the violent hiss.

Post by **fuzzysnuggleduck** » Thu Jun 05, 2008 9:38 pm

The M series definitely sound great. PG engineered a good line of amps as well. Each model incrementally suits a particular purpose.