Popping sound and hiss

dynome · Post by **dynome** » Tue Mar 28, 2006 8:39 pm

Hey, I'm completely new to this forum and I just recently installed my first "serious" sound system. This is what I have installed:

Pioneer Premier receiver 750 MP
Hifonics Zeus 2400 100 watts x 2 at 4 ohms going into
CDT components
Knu Koncepts 4 awg wiring kit
Pioneer 6.75 in back for fill off receiver's amp
Tons of Edead (elemental design) the thin mat and the brush on

I'll see if I can attach some photos of this install. It was into a 99 Saturn SC. I was going for stealth by the way

The problem is that now I have a popping noise when I switch radio stations, change eq presets, and turn volume up from all the way down. I also have some light hiss when the car is running that is not there when the car is off. The amp is mounted under the passenger seat and the tweeters are mounted just above the receiver. Any idea's of things to check? How far away do power wires need to be from rca's, crossovers, or speaker wires. Would having tweeters or a cooling fan have any effect on that receiver? I can crank it with the car off and it sounds great, just pops when I do stuff on receiver...

dynome · Post by **dynome** » Tue Mar 28, 2006 8:45 pm

Stink, I'm computer dumb too. Says I don't have any room for attachments?? They are small jpegs-- 35kb

kevinberry1 · Post by **kevinberry1** » Tue Mar 28, 2006 8:48 pm

dynome wrote:the tweeters are mounted just above the receiver

What do you mean they are mounted above the receiver, the head unit?

Did you run your power wire along side your rca's? That would be the first thing to change if you did. You may also have a pinched RCA somewhere, so pull the deck out and check behind it to make sure that isn't the cause. That is often the place where it occurrs.

Also, where is your amp grounded and how long is the ground wire? Make sure it is bolted to bare metal with any paint sanded down. That is all I can think of, there are many more knowledgeable people than I on this site, so I'm sure someone can give you more suggestions. Good luck.

kevinberry1 · Post by **kevinberry1** » Tue Mar 28, 2006 8:49 pm

dynome wrote:Stink, I'm computer dumb too. Says I don't have any room for attachments?? They are small jpegs-- 35kb

Host them somewhere like photobucket and link them here.

dynome · Post by **dynome** » Tue Mar 28, 2006 9:12 pm

Here is how I mounted the tweeters and a cooling fan right above the receiver.

Here is how I mounted the amp.

(with carpet installed)

That pinched RCA could be it as it's a pretty snug fit behind my receiver for those RCA's. Also, I had to notch a little bit of the frame for the amp's inputs and found that there was yet another layer of metal under that if cut would allow the RCA's to not be touching at all but then you could see the ground too :)

dynome · Post by **dynome** » Tue Mar 28, 2006 9:18 pm

Here is the RCA with notching in metal like I was trying to describe:

dynome · Post by **dynome** » Tue Mar 28, 2006 9:36 pm

Oh, and the power wire is within probly 8 inches at its closest point to the rca's. I used a factory ground for my amp which was a 10 mm bolt on the front seat belt frame on the floor board. I sanded it to bare metal and used a gold plated crimp on the end then snugged it down with that 10 mm bolt. The head unit however seems to be grounded even though I didn't mean to. I built custom brackets out of 1/8" steel that use heavy duty bolts to bolt it to the metal frame inside the dash just for peace of mind (cheap man's security). I was messing with the ground wire off the receiver which I had put on a crimp on spade and bolted this to sanded metal inside the dash using a small 5/16" bolt, when I accidently disconnected it with the receiver still on. Well, the receiver did not turn off. It stayed on which leads me to believe that since the receiver chassis is bolted directly to the frame with the fabricated metal pieces, that it might not even need the ground wire. I recconected it however of course.

Here is receiver mounted: (if anyone is interested in a template for this design, I could draw it up on CAD and send it to ya pdf. I had to do some notching to the original "guessed" hole to make it line up perfectly.)

bolted in place:

battery connections should be good. ran an extra 4 gauge from chassis to negative terminal:

Post by **GlassWolf** » Wed Mar 29, 2006 8:30 am

hiss and popping sounds like the gain on your amp is turned up too far.
try it no higher than one quarter of a turn up from minimum.

sinister audio · Post by **sinister audio** » Wed Mar 29, 2006 9:29 am

that fan may be putting noise into your radio too if your gains arnt too high.

Bwcad1 · Post by **Bwcad1** » Wed Mar 29, 2006 9:33 am

yea my first check would be the gain then try disconnecting the fan.