Jump to content


Sign in to follow this  
gmpisawresome

Hissing coming from amp even with no RCA input

Recommended Posts

I'm finally at the end of my build, and while everything is installed correctly, I still have a high pitched hiss coming from the tweeters. The speakers are morel Maximo 6 hooked up to a Kenwood kac-304 bridged @4 ohm. The RCA is hooked up to a Kenwood ddx9903s. Even when the RCA is unplugged, I still get a hissing noise from my amp. From about 0-75% gain the noise is the same but above 75 it starts to get louder; I have my gain on ~50%. I have a good ground I think, and even hooked the amp straight to the battery to test and it still hissed. Any ideas?

Share this post


Link to post
Share on other sites

Thinking you have a good ground wouldn't hurt to check anyway. Bare metal to bare metal. Most noises are caused by bad grounding points. Oh dam. Didn't read your last sentence. You may have a bad amp in your posession.


97 4 dr. Tahoe

Interstate battery

Alpine 9835

Polk Audio MM6501 comps

Wolfram amps coming soon, 3000.1, 125.4

2 Sundown Audio X 15's Tuned @ 30Hz.

Knukonceptz/Royal Excelene wiring

Share this post


Link to post
Share on other sites
6 hours ago, Boomin_tahoe said:

Thinking you have a good ground wouldn't hurt to check anyway. Bare metal to bare metal. Most noises are caused by bad grounding points. Oh dam. Didn't read your last sentence. You may have a bad amp in your posession.

I might just be wanting it to be too perfect. What is an acceptable amount of static from an amp? It's almost drowned out by my cars idle (little Toyota 4 cyl) but you can still hear it if you listen.

Share this post


Link to post
Share on other sites
On 1/6/2019 at 2:53 AM, Boomin_tahoe said:

Thinking you have a good ground wouldn't hurt to check anyway. Bare metal to bare metal. Most noises are caused by bad grounding points. Oh dam. Didn't read your last sentence. You may have a bad amp in your posession.

isnt hissing like that sometimes caused by bad caps?


2002 Honda Accord sedan V6 (automatic slushbox)

2 Rockford p3 12s (dual 2 ohm)

Pioneer AVH-2300NEX

2 PPI PC275's running 1 sub each atm, waiting to put the SQ 2200.1 back in and add the PhoenixGold Elite.4 once my electrical is up to snuff

Front stage:PRV Audio 6MB200 6.5 and Massive Audio CT2 tweeters

Rear speakers: stock

I just added 5 SoundQubed stickers, and despite having no equipment upgrades, it added 76 DB!!!

Share this post


Link to post
Share on other sites

Create a free account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's free & easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×