Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Join
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Help
Wiring, Electrical & Installation
Head scratcher.... am I missing something?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="garychoffmann" data-source="post: 8166940" data-attributes="member: 631273"><p>Well, I went out to my project car to work on the stereo. I installed my ppi a404 and a1200. Fired it up and a lower pitched pulsating hum coming out of all of the speakers. So I start trouble shooting. Voltage is great, grounds are extensively grounded. Head unit output is perfect. Everything checks out. I had the amps rebuilt about a year ago so I thought maybe its an amp issue. Hooked the amps up in my truck and they sounded beautiful. Took my directed 1100d5 and put it in my car.. it sounded perfect. Took the ppi's out of the truck and back in the car. Noise is back. I drop the amps off at the guy who rebuilt them and had him test them. Checked out perfect. So I check for an rca issue and voltage/sine look perfect. To double check I use my Yamaha receiver and run rca's to the amp. Hum is there still. I'm stumped so I start swapping in other amps. Put in a t2500.1, a600, phoenix gold 475ti, junk Sony 4 channel, a cobalt 260. Everything worked perfectly. Now here is where it gets interesting. I put another a404 in there and it was a little better but was there. Put in an old ppi sedona and it was there. Sooo my conclusion. Ppi hates my car. I can run anything but these ppi's. Any ideas? I'm plum out.</p></blockquote><p></p>
[QUOTE="garychoffmann, post: 8166940, member: 631273"] Well, I went out to my project car to work on the stereo. I installed my ppi a404 and a1200. Fired it up and a lower pitched pulsating hum coming out of all of the speakers. So I start trouble shooting. Voltage is great, grounds are extensively grounded. Head unit output is perfect. Everything checks out. I had the amps rebuilt about a year ago so I thought maybe its an amp issue. Hooked the amps up in my truck and they sounded beautiful. Took my directed 1100d5 and put it in my car.. it sounded perfect. Took the ppi's out of the truck and back in the car. Noise is back. I drop the amps off at the guy who rebuilt them and had him test them. Checked out perfect. So I check for an rca issue and voltage/sine look perfect. To double check I use my Yamaha receiver and run rca's to the amp. Hum is there still. I'm stumped so I start swapping in other amps. Put in a t2500.1, a600, phoenix gold 475ti, junk Sony 4 channel, a cobalt 260. Everything worked perfectly. Now here is where it gets interesting. I put another a404 in there and it was a little better but was there. Put in an old ppi sedona and it was there. Sooo my conclusion. Ppi hates my car. I can run anything but these ppi's. Any ideas? I'm plum out. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Wiring, Electrical & Installation
Head scratcher.... am I missing something?
Top
Menu
Home
Refresh