i think my amp is blown

[matinm90 10+ year member]

okay, yeah cuz id assume if there was a discontinuity from the receiver, then no signal should go through the receiver to the amp id assume, but ill first test with my iphone and if that works right then ill do the other tests. but thank you for ur help

 

[Spooney 10+ year member]

Feel free to Pm me if you want with any further questions.

 

[matinm90 10+ year member]

sure and thanks again.

 

[BnGRacing 10+ year member]

The "boom boom boom" noise your subs are making while no music is pumped into the amp is actually noise & oscillations within the amp being amplified. It could also be a ground pulse within the amp or **** poor filtering. Either way, your amp is bad.

No music in = no music out. Anything other than that means your amp is bad. If you could run it full range and hook it up to a speaker, I wouldn't be surprised if it made noises like George Jetson's flying car...but it's a D-class and the switching speeds are much lower.

 

[matinm90 10+ year member]

okay so basically ur saying that the amp is incorrectly amplifying the sound? that is, its seeing low low idle frequencies as normal audio input and therefore amplifying them?

 

[matinm90 10+ year member]

Okay so I connected an RCA cable from my iPod directly to the amp. Now it didn't make that noise but, what's weird is the amp didn't seem to be able to filter out the highs and mids, I could basically hear the song it self play through the subs. I of course turned it off right away but does it sound like a bad connection between the receiver and the amp? Or the amp? And remember I had the amp set to LPF an at the lowest level. So let me know what you think.

 

[subzero 5,000+ posts]

go over all your connections, and maybe run some new RCA cables. make sure nothing is pintched or streatched. If you are getting a engine whine, then you need to ground the RCAs Search on here for the tthread that shows how to ground the RCAs

 

[akheathen Premium Member]

make all the tests first. aside from a bad amp, it could also be a cycling result of a bad ground at either the amp, head unit, or even battery to body ground. bad ground in those areas also have the potential to damage the amp as well. one more thing about dmm's- ohms sero adjustment is usually off, even on high dollar meters, like flukes. so, you need to take a zero reading, which will typically show as .2-.02ohms. subtract that from any reading you get. good continuity will be zero, or very close

 

[matinm90 10+ year member]

Okay so I set the multimeter to reistance measurement. I took one lead and touched the groun wire connected to the amp. Then I took the other lead and touched it on the RCA plugs ground wire -outer section- and I wasn't getting anything in terns of an actual number. I'm gonna do the second test when I can. But what does the first test say?

 

[Spooney 10+ year member]

Pm me when you get a chance.