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 Equipment
Subwoofers
Subwoofer/Amp from factory sub wires
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="PF5150" data-source="post: 8721874" data-attributes="member: 681454"><p>Needing some help with the install of a sub/box. Have an older four channel Alpine amp powering a single sub. 2011 Jeep Grand Cherokee/stock head unit.</p><p></p><p>So, the Jeep has a factory sub in the back and has two sets of speaker wires going to it, a single driver. I have assumed that they are simply a L/R speaker-level output, but I'm not clear on how two channels (4 wires) can be wired to a single driver. That's problem #1, I'm not sure what kind of setup this is.</p><p></p><p>Assuming anyway that these are regular L/R pairs, I connected them to the Amps's channel 1&2 speaker-level inputs. The sub output was low at high volume, but at lower volume the sub output is too high. I reasoned that it might be out of phase so I inverted the speaker wires (no phase option on this amp). This helped bass but sub output continued to be too high at low volumes. If I turned down the gain, output at higher volume would still suffer. Bass at this stage is ok, not great overall.</p><p></p><p>While playing with the speaker to Amp connections, I saw that if channel 1 was connected and I connected just one wire of channel 2 to the amp, the sub would come to life and I had to turn down the gain because it was rattling the panels in the car. How can just one wire from a pair do anything? I can't see how this could be good for long so that's problem #2.</p></blockquote><p></p>
[QUOTE="PF5150, post: 8721874, member: 681454"] Needing some help with the install of a sub/box. Have an older four channel Alpine amp powering a single sub. 2011 Jeep Grand Cherokee/stock head unit. So, the Jeep has a factory sub in the back and has two sets of speaker wires going to it, a single driver. I have assumed that they are simply a L/R speaker-level output, but I'm not clear on how two channels (4 wires) can be wired to a single driver. That's problem #1, I'm not sure what kind of setup this is. Assuming anyway that these are regular L/R pairs, I connected them to the Amps's channel 1&2 speaker-level inputs. The sub output was low at high volume, but at lower volume the sub output is too high. I reasoned that it might be out of phase so I inverted the speaker wires (no phase option on this amp). This helped bass but sub output continued to be too high at low volumes. If I turned down the gain, output at higher volume would still suffer. Bass at this stage is ok, not great overall. While playing with the speaker to Amp connections, I saw that if channel 1 was connected and I connected just one wire of channel 2 to the amp, the sub would come to life and I had to turn down the gain because it was rattling the panels in the car. How can just one wire from a pair do anything? I can't see how this could be good for long so that's problem #2. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Equipment
Subwoofers
Subwoofer/Amp from factory sub wires
Top
Menu
Home
Refresh