Subwoofer timing issues.
Thread Starter
|
New User
Joined: Dec 2005
Posts: 13
Likes: 0
From: Edmond, OK
Subwoofer timing issues.
I recently put two 8" Kicker Comps in my truck, in a unpartitioned circular ported box, at about 1.5cu'. I listen to some trance every now and then (DJ Tiesto, usually) and I notice that the subs are always just barely out of time. The beat is always four on the floor, and the hits are just slightly behind every time. I tried changing the crossover, adjusting the focus and the bass eq, and (temporarily) sealing the box, but nothing works.
Any ideas?
The head unit is a Pioneer DEH-P3600 and the amp is an Alpine T-220.
Cheers,
Xabrophazon
Any ideas?
The head unit is a Pioneer DEH-P3600 and the amp is an Alpine T-220.
Cheers,
Xabrophazon
Senior User
Joined: Nov 2004
Posts: 469
Likes: 0
From: Independence, Missouri
silly question but are your polarities right? Out of phase? One quick test without pulling the subs from the enclosure is to take a 9volt battery and pop the speakers with it. When the speaker pops outward what ever wire is on the positive terminal of the battery is your positive on the speaker.
Thread Starter
|
New User
Joined: Dec 2005
Posts: 13
Likes: 0
From: Edmond, OK
I checked my polarity a thousand times, but I found that, oddly enough, if I just barely crack the windows, they get in time and sound stronger. I'm not sure what causes that... but it works! They're still a hint out of time... I'm very sure that the polarity is correct. Is there anything else that could be the problem?
Lead Driver
Joined: Feb 2003
Posts: 8,140
Likes: 4
From: Oak Harbor, OH
Are they in seperate boxes or in a single box? If it's a single box did you create two individual chambers, one for each sub? If not they may negating eachother.
Trending Topics
Postmaster
Joined: Jul 2004
Posts: 3,624
Likes: 1
From: Bixby, OK
They would negate eachother if they were different subs and/or powered by anything else except a mono-channel amp.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Senior User
Joined: Apr 2003
Posts: 285
Likes: 0
the fact they are louder with the window cracked/down is you are allowing more airflow, basically turning the cab into a bandpass enclosure. have you tried reversing the phase (different than polarity)? you should be able to put the sub out at 180 deg. out of phase from the headunit.
Senior User
Joined: Nov 2004
Posts: 469
Likes: 0
From: Independence, Missouri
The bass issue with your windows cracked is a common problem. My Excursion is the same way. You'll find alot of people have more bass with the windows cracked. Just proves that your truck is sealed good..lol
Thread Starter
|
New User
Joined: Dec 2005
Posts: 13
Likes: 0
From: Edmond, OK
Originally Posted by bill6302
the fact they are louder with the window cracked/down is you are allowing more airflow, basically turning the cab into a bandpass enclosure. have you tried reversing the phase (different than polarity)? you should be able to put the sub out at 180 deg. out of phase from the headunit.
Thanks again for the help guys.
