Hi, all....
I've recently installed a Sony XM-GS4 (4-channel, Class A/B amp), and I have some speaker hiss through my midrange and tweeters. It's not audible with music playing, but it's slightly audible from the listening position (driver's seat).
It's ABSOLUTELY the amp and nothing to do with my install. I bench-tested it with no signal and different speakers, and the hiss is always there. Trust me, I've troubleshot the CRAP out of this one, and I'm 100% sure it's just what the amp does.
Here's what's weird, though: After listening to music on the amp for a while (5-10 minutes), you can turn the volume all the way down, and this hiss is usually (but not ALWAYS) completely gone... dead silent on all speakers. Turn the car (amp) off and back on... usually the hiss is there (but a couple of times it WASN'T there).
So, three questions, if I may:
(1) When would you consider speaker 'hiss' a problem or in need of address? I'd love a tomb-silent noise floor, but that might not be possible or realistic. I wonder if it's not that bad and I'm just being a crazy person at this point. lol
(2) Is there anything you can recommend to reduce that hiss (the gains are already all the way down on the amp)?
(3) ANY idea why the hiss might be there at start up but dissipate? I speculated that maybe the new components (it's a brand-new amp) like capacitors maybe needed time to 'break in,' but I've never heard of anything like that, and I can't find anything to support that theory.
I'd love any insights you might have to help save my sanity! Thanks, friends!
I've recently installed a Sony XM-GS4 (4-channel, Class A/B amp), and I have some speaker hiss through my midrange and tweeters. It's not audible with music playing, but it's slightly audible from the listening position (driver's seat).
It's ABSOLUTELY the amp and nothing to do with my install. I bench-tested it with no signal and different speakers, and the hiss is always there. Trust me, I've troubleshot the CRAP out of this one, and I'm 100% sure it's just what the amp does.
Here's what's weird, though: After listening to music on the amp for a while (5-10 minutes), you can turn the volume all the way down, and this hiss is usually (but not ALWAYS) completely gone... dead silent on all speakers. Turn the car (amp) off and back on... usually the hiss is there (but a couple of times it WASN'T there).
So, three questions, if I may:
(1) When would you consider speaker 'hiss' a problem or in need of address? I'd love a tomb-silent noise floor, but that might not be possible or realistic. I wonder if it's not that bad and I'm just being a crazy person at this point. lol
(2) Is there anything you can recommend to reduce that hiss (the gains are already all the way down on the amp)?
(3) ANY idea why the hiss might be there at start up but dissipate? I speculated that maybe the new components (it's a brand-new amp) like capacitors maybe needed time to 'break in,' but I've never heard of anything like that, and I can't find anything to support that theory.
I'd love any insights you might have to help save my sanity! Thanks, friends!
Hmmm... interesting thought, Perry. Forgive my ignorance, but I assume you mean the current running through the power wire to the amp? If so, is there a way to measure that without an amperage clamp meter (don't have one handy--probably should get one, though)?
Can I ask what you're thinking??
Can I ask what you're thinking??