Amp, Subs, Engine Noise
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=23776
Printed Date: July 06, 2025 at 7:43 PM
Topic: Amp, Subs, Engine Noise
Posted By: pine_pony
Subject: Amp, Subs, Engine Noise
Date Posted: January 02, 2004 at 11:40 AM
When i plug the signal cables into my amp the subs go crazy and i get engine noise i have taken the RCA's out and ran them outside the car touching nothing so i don't know what to do any ideas?
Replies:
Posted By: bberman1
Date Posted: January 02, 2004 at 12:12 PM
Can you list all your equipment and a brief description of how you have things hooked up? Also have you tried a different set of RCA's?
Posted By: pine_pony
Date Posted: January 02, 2004 at 12:43 PM
i have an alpine CDA-9811 head unit, MTX 4 channel amp, 2 10" rockford fosgate hx2 subs in a ported box. I have rockford fosgate gold plated RCA's and a lighning audio 1 farad capacitor. The subs are 4 ohm dual voice coil so i have them each wired individually to the four channel amp in series making it a 2 ohm load for each bridged channel on the amplifier
Posted By: forbidden
Date Posted: January 02, 2004 at 2:47 PM
Where is the amp and cd player grounded to, what kind of car is the gear mounted in? Is your amp 2 ohm 2channel mono stable, if not and I expect not, you are asking the amp to do something it is not designed to do. Most amps will operate in 2 ohm mode in stereo, but not in a bridged mono mode, this may be part of the problem.
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