Menu
Forum
General Car Audio
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Build Logs
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Home Audio
Off-topic Discussion
The Lounge
What's new
Search forums
Gallery
New media
New comments
Search media
Members
Registered members
Current visitors
Classifieds Member Feedback
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Register
Forum
Search
Search titles and first posts only
Search titles only
Search titles and first posts only
Search titles only
Log in / Join
What’s new
Search
Search titles and first posts only
Search titles only
Search titles and first posts only
Search titles only
General Car Audio
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Build Logs
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Home Audio
Off-topic Discussion
The Lounge
What's new
Search forums
Menu
Reply to thread
Forum
Car Audio Help
Wiring, Electrical & Installation
Single sub phase problem?
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="BTG" data-source="post: 8141243" data-attributes="member: 656230"><p>Howdy, I have not done a car audio install since the mid 90's, but I used to do quite a few. My girlfriend decided that she wanted a little thump in her 09 Mazda 3, and I found some used equipment cheap from my cousin, and bought it to install for her, however I am having a weird issue I was hoping for help with.</p><p></p><p>First, here is the setup:</p><p></p><ul> <li data-xf-list-type="ul">09 Mazda 3 stock (non bose) head unit.<br /> </li> <li data-xf-list-type="ul">Line out converter (either the wiring diagrams I found were backwards, or I read it backwards, but the LOC is tapped to the front speakers instead of the rear for now.)<br /> </li> <li data-xf-list-type="ul">Pioneer GM-5500t (it is running bridged)<br /> </li> <li data-xf-list-type="ul">12in Kicker CompS sub in a sealed enclosure<br /> </li> </ul><p></p><p></p><p>After much struggling and cursing, I got the power, amp remote, and RCA cables run and tucked in. I also had to find a good ground when EVERYTHING in the **** trunk is painted/coated/covered in some way, and I only had a short ground wire.</p><p></p><p>As it stands it plays, and the grounding is good as I have no clicks/whine with the motor on. I was very happy about this!</p><p></p><p>The amp has the built-in lowpass crossover on and set at ~250hz.</p><p></p><p>The problem is this. The bass is extremely weak. If I adjust the balance all the way to the left or right, it thumps, but in the middle it is very weak. Now from past experience (at least with non-bridged setups) between any two speakers on opposite channels (l/r or front/rear), if adjusting to one of the speakers increased the volume, it was a phase problem. Either a speaker was wired in revers polarity or the input signal on one channel was reversed somehow.</p><p></p><ul> <li data-xf-list-type="ul">At any rate, thinking it may be a phase issue, this is what I have tried, and the results:<br /> </li> <li data-xf-list-type="ul">Reverse the input polarity of one side of the LOC (No change)<br /> </li> <li data-xf-list-type="ul">Remove one RCA (still weak in the middle, when balanced to the removed side no sub, to the other side it rocks).<br /> </li> <li data-xf-list-type="ul">Reversed the polarity of the sub (I have not been in the box so it could have been wired wrong, so I reversed it at the amp, thinking maybe it is out of phase with the rest of the speakers somehow- but also knowing if it was, balance adjustments shouldn't make it louder) (Results, no change)<br /> </li> </ul><p></p><p></p><p>There are a couple of other things I could try, but my mind is saying they will have no difference, and that is, reverse the inputs to -both- left and right on the LOC, wire the LOC to the rear speaker outputs.</p><p></p><p>I feel like in my lack of recent experience I am missing something very simple but I do not know what. Any help is much appreciated, as I am getting very frustrated with this.</p></blockquote><p></p>
[QUOTE="BTG, post: 8141243, member: 656230"] Howdy, I have not done a car audio install since the mid 90's, but I used to do quite a few. My girlfriend decided that she wanted a little thump in her 09 Mazda 3, and I found some used equipment cheap from my cousin, and bought it to install for her, however I am having a weird issue I was hoping for help with. First, here is the setup: [LIST] [*]09 Mazda 3 stock (non bose) head unit. [*]Line out converter (either the wiring diagrams I found were backwards, or I read it backwards, but the LOC is tapped to the front speakers instead of the rear for now.) [*]Pioneer GM-5500t (it is running bridged) [*]12in Kicker CompS sub in a sealed enclosure [/LIST] After much struggling and cursing, I got the power, amp remote, and RCA cables run and tucked in. I also had to find a good ground when EVERYTHING in the **** trunk is painted/coated/covered in some way, and I only had a short ground wire. As it stands it plays, and the grounding is good as I have no clicks/whine with the motor on. I was very happy about this! The amp has the built-in lowpass crossover on and set at ~250hz. The problem is this. The bass is extremely weak. If I adjust the balance all the way to the left or right, it thumps, but in the middle it is very weak. Now from past experience (at least with non-bridged setups) between any two speakers on opposite channels (l/r or front/rear), if adjusting to one of the speakers increased the volume, it was a phase problem. Either a speaker was wired in revers polarity or the input signal on one channel was reversed somehow. [LIST] [*]At any rate, thinking it may be a phase issue, this is what I have tried, and the results: [*]Reverse the input polarity of one side of the LOC (No change) [*]Remove one RCA (still weak in the middle, when balanced to the removed side no sub, to the other side it rocks). [*]Reversed the polarity of the sub (I have not been in the box so it could have been wired wrong, so I reversed it at the amp, thinking maybe it is out of phase with the rest of the speakers somehow- but also knowing if it was, balance adjustments shouldn't make it louder) (Results, no change) [/LIST] There are a couple of other things I could try, but my mind is saying they will have no difference, and that is, reverse the inputs to -both- left and right on the LOC, wire the LOC to the rear speaker outputs. I feel like in my lack of recent experience I am missing something very simple but I do not know what. Any help is much appreciated, as I am getting very frustrated with this. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Wiring, Electrical & Installation
Single sub phase problem?
Top
Menu
What's new
Forum list
