Bah!! So frustrating!!

[Bossman150]

do you have the car with you or is it at the shop? is it the maxima in you avatar pic?

Yes I have it with me and yes its the Max. I use to have a tool to pull aftermarket pioneer HUs out but I lost it years ago.

 

[C1500martin 10+ year member]

well see if you can pull it out somehow look up videos on youtube. im pretty sure its that as it often is. ESPECIALLY with pioneer radios.

 

[The Camry]

The outer jacket of the rca is the ground, The inner pointy part is the positive. Thats why their is a rubber part keeping them apart.

how to ground your rcas. Try that and see what effect it has.

 

[Bossman150]

I can't find any useful videos on removing my stereo, I have another appointment for Thursday. I don't want to risk breaking something, I will have them do it.

 

[Boomin_tahoe 5,000+ posts]

Could be the alt too.

I too have severe alt whine.

 

[The Camry]

Ive gotten alt whine from a crappy Dual amp i had in once. Took it out and put a nice Sundown amp and poof. No more whine.

How To - Car Stereo - In Pursuit of a Noise-Free System: The Ten Commandments of Noise Prevention

 

[Bossman150]

Ive gotten alt whine from a crappy Dual amp i had in once. Took it out and put a nice Sundown amp and poof. No more whine.
How To - Car Stereo - In Pursuit of a Noise-Free System: The Ten Commandments of Noise Prevention

Thanks for that list! Alot of that stuff I can do myself.

 

[Bossman150]

Why does this type of crap have to happen??!! This system sounds really impressive, the AB 150.4 actually gives the Kicker 6x9's real midbass that I can feel unlike the soundstream. I forget about the issue until the next song is over and that god awful noise becomes audible again. //content.invisioncic.com/y282845/emoticons/crying.gif.ec0ebefe590df0251476573bc49e46d8.gif

 

[Bossman150]

Ok so I just ran to my car on break and tried this:

2.With the system turned off, unplug the RCA inputs to the amplifier.

3.Start the vehicle and turn the system on. If the noise is gone go to step 8. If the noise is still present, it is coming from the amp or the speaker wiring. Continue.

There was no noise at all with the RCA's unlpugged, so:

8.If youve made it here, you know that the amplifier and speaker wiring are okay.

So if this list is correct, then it can't be the amp or speaker wiring? So that would leave RCA's (possibly hot swapped like suggested earlier) or another grounding issue with the HU correct? If it was the amp ground, then there would be noise present with the RCA's disconnected correct? There are no other accessories in the system, just the hu and two amps, no crossovers or anything else.

 

[wew lad 5,000+ posts]

I had an amp backfeeding through my RCAs into my headunit, and then out those RCAs into the highs speakers. So one thing you may want to check is if the noise is present with your sub amp unplugged but your mids/highs amp plugged in.

If the noise is only gone when both amps are unplugged then it's pretty likely you need to address your headunit/RCAs/Power and GND situation as a whole. If it's a pioneer headunit you definitely need to try grounding the RCAs because it'll tell you if the internal pico fuse is blown or not. If it's any other headunit, unplug it and plug in a different source unit

 

[Bossman150]

I had an amp backfeeding through my RCAs into my headunit, and then out those RCAs into the highs speakers. So one thing you may want to check is if the noise is present with your sub amp unplugged but your mids/highs amp plugged in.
If the noise is only gone when both amps are unplugged then it's pretty likely you need to address your headunit/RCAs/Power and GND situation as a whole. If it's a pioneer headunit you definitely need to try grounding the RCAs because it'll tell you if the internal pico fuse is blown or not. If it's any other headunit, unplug it and plug in a different source unit

The noise is gone with just the RCA's on the 4 channel amp unplugged, there is no alt noise coming from the subwoofer that I can hear. If this pico fuse is blown, then shouldn't they just replace the hu for me? It's less than a month old. Would there be noise coming from the sub if the pico fuse is blown?

 

[wew lad 5,000+ posts]

Alternator whine is usually a problem with smaller drivers like tweeters and midranges because they're more sensitive to it due to a variety of factors (not going to go into that much depth). Try leaving the RCA's for the 4 channel plugged in, but unplug your sub amp RCAs, and see if there's any difference.

You shouldn't automatically assume that the pico fuse is blown, it could be fine, you didn't say whether it was a pioneer or not. As I said, you can try using an alternate input source.

 

[Bossman150]

Yes it's a Pioneer. I will get a mini to RCA adapter and try using my iphone as input.

 

[Bossman150]

Ok so I used my phone as the source with the mini to RCA adapter and there is no noise at all. So with that being the case, this eliminates the amp and amp grounds as the source correct? The only pieces left would be the RCA cables and the hu? I really think its the hu, and the pico fuse issue. It makes sense considering the hu was not pulled out during the amp swap, so the RCA's were connected when the amps were swapped, and there was no noise before the swap.

 

[C1500martin 10+ year member]

Ok so I used my phone as the source with the mini to RCA adapter and there is no noise at all. So with that being the case, this eliminates the amp and amp grounds as the source correct? The only pieces left would be the RCA cables and the hu? I really think its the hu, and the pico fuse issue. It makes sense considering the hu was not pulled out during the amp swap, so the RCA's were connected when the amps were swapped, and there was no noise before the swap.

yes we stated its the HU already, did you take it to the shop and do the simple wire to rca test?