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
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
Accord loud "hum" using high level input
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="BreadLord" data-source="post: 8664602" data-attributes="member: 674841"><p>Hey guys, I got my girlfriend a subwoofer setup for chirstmas and I got it installed today but was met with issues. The amp is capable of taking high level inputs into the RCA and is also able to switch on when the radio is when configured this way so no need for a remote wire. Anyway I got everything in, RCAs tied to the rear speakers (In correct polarity), and everything played fine. Sounded good, but when I closed the trunk the sub immediately started playing a very loud tone. I checked both the ground to body at battery and ground to sub in trunk, both are bare metal. I have no idea what's causing it, granted I'm new. So recap, RCA is taking in high level input from rear speakers, and everything works fine so long as the trunk is open. Grounds are both bare metal.</p><p></p><p>I also put my own battery in the trunk, disconnected the amp from the car power and used the other battery for power, same thing. </p><p></p><p>I also disconnected the RCAs and connected an RCA to 3.5mm jack to my phone and amp, sub played fine even when using the car power and trunk closed.</p><p></p><p>That tells me it's the high level input setup (I think) but I don't know why. I even took alligator clips onto each lead of the rear right speaker and put them onto a stripped RCA connector. Put this RCA into a splitter and then that into amp. I then used a jumper from 12v to remote to turn on the amp. Same thing happened but with trunk open and radio off. (In all instances engine was off).</p><p></p><p>The bolt being used in trunk is a factory grounding bolt for the taillights. I brought it to bare metal under the bolt. Same thing I did in my friends corrolla which worked fine. </p><p></p><p>Probably (99.9%) my fault, but I'm having a hard time and I cant find help elsewhere. </p></blockquote><p></p>
[QUOTE="BreadLord, post: 8664602, member: 674841"] Hey guys, I got my girlfriend a subwoofer setup for chirstmas and I got it installed today but was met with issues. The amp is capable of taking high level inputs into the RCA and is also able to switch on when the radio is when configured this way so no need for a remote wire. Anyway I got everything in, RCAs tied to the rear speakers (In correct polarity), and everything played fine. Sounded good, but when I closed the trunk the sub immediately started playing a very loud tone. I checked both the ground to body at battery and ground to sub in trunk, both are bare metal. I have no idea what's causing it, granted I'm new. So recap, RCA is taking in high level input from rear speakers, and everything works fine so long as the trunk is open. Grounds are both bare metal. I also put my own battery in the trunk, disconnected the amp from the car power and used the other battery for power, same thing. I also disconnected the RCAs and connected an RCA to 3.5mm jack to my phone and amp, sub played fine even when using the car power and trunk closed. That tells me it's the high level input setup (I think) but I don't know why. I even took alligator clips onto each lead of the rear right speaker and put them onto a stripped RCA connector. Put this RCA into a splitter and then that into amp. I then used a jumper from 12v to remote to turn on the amp. Same thing happened but with trunk open and radio off. (In all instances engine was off). The bolt being used in trunk is a factory grounding bolt for the taillights. I brought it to bare metal under the bolt. Same thing I did in my friends corrolla which worked fine. Probably (99.9%) my fault, but I'm having a hard time and I cant find help elsewhere. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Wiring, Electrical & Installation
Accord loud "hum" using high level input
Top
Menu
Home
Refresh