2 is not always louder
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=106754
Printed Date: May 14, 2024 at 4:19 PM
Topic: 2 is not always louder
Posted By: PATPJRICK
Subject: 2 is not always louder
Date Posted: August 13, 2008 at 6:17 PM
In my car, 1995 Saturn SL1, I am running 2 bazooka EL1500 mono channel amps and 2 12 inch pioneer subs. The other day I happened to notice that the bass was deeper all of a sudden....and I liked it. Then as I was working on the car one day I noticed that the 15 amp fuses were all blown (4 of them altogether)on one of the EL1500's. I replaced them and the sub sounded like it was vibrating in the enclosure and took away bass from the other sub. As I put in the 4 fuses I noticed that the rubber surround was starting to get frayed from rubbing on something I had in the trunk. So I bought a new sub and still it doesn't sound as deep of bass as what it was with only a single 12 inch sub.
Why is this?
Replies:
Posted By: aznboi3644
Date Posted: August 13, 2008 at 6:42 PM
we need more information. You have not told us how the subs are wired...what enclosure they are in. If they are in phase relative to each other. How the gains are set.
Posted By: i am an idiot
Date Posted: August 13, 2008 at 6:52 PM
Sounds like you have one of the woofers wired up backwards. Reverse the wires on one of your woofers. Only one woofer do not do both of them. Even if you have it wired correctly, there may be a phasing problem between the 2 amplifiers.
Posted By: PATPJRICK
Date Posted: August 13, 2008 at 6:55 PM
1.its a mono channel 500 watt amp.
2.1-12 inch sub per 500 watt mono channel amp.
3.They are in a custom fiberglass enclosure tucked in the corners of the trunk.
4.Each amp is set at 3/4 level between min and max...crossover is set at 1/2 way between 40 and 130 htz....and bass boost is 3/4 between 0 and 12 db.
5. each sub is wired the same...positive of speaker to positive of amp and negative to speaker and negative to amp
Posted By: i am an idiot
Date Posted: August 13, 2008 at 7:42 PM
i am an idiot wrote:
there may be a phasing problem between the 2 amplifiers.
Internally. Did you try reversing phase on one of your woofers?
Posted By: PATPJRICK
Date Posted: August 13, 2008 at 8:30 PM
I'll have to try in the morning....don't wanna wiz off any neighbors after there bedtimes
Posted By: 97gss
Date Posted: August 14, 2008 at 11:22 AM
PATPJRICK wrote:
I'll have to try in the morning....don't wanna wiz off any neighbors after there bedtimes
You don't have to wake up the neighborhood to tell the difference. It can be noticed at low volume.
Posted By: PATPJRICK
Date Posted: August 14, 2008 at 2:40 PM
but to get the full effect ya gotta crank it up
WOOHOO its fixed....just swapped the wires and boom i got the bass
Posted By: DYohn
Date Posted: August 14, 2008 at 2:46 PM
Cancellation is an amazingly powerful thing, eh? ------------- Support the12volt.com
Posted By: i am an idiot
Date Posted: August 14, 2008 at 8:22 PM
2 out of phase always not louder than 1
Posted By: kovemaster559
Date Posted: August 17, 2008 at 8:15 PM
PATPJRICK wrote:
In my car, 1995 Saturn SL1, I am running 2 bazooka EL1500 mono channel amps and 2 12 inch pioneer subs. The other day I happened to notice that the bass was deeper all of a sudden....and I liked it. Then as I was working on the car one day I noticed that the 15 amp fuses were all blown (4 of them altogether)on one of the EL1500's. I replaced them and the sub sounded like it was vibrating in the enclosure and took away bass from the other sub. As I put in the 4 fuses I noticed that the rubber surround was starting to get frayed from rubbing on something I had in the trunk. So I bought a new sub and still it doesn't sound as deep of bass as what it was with only a single 12 inch sub.
my car is the same way i had 1 15 that gets louder from my amp at more power and bigger box
Why is this?
------------- I MAKE CUSTOM BAFFLES SPEAKER RINGS AND GASKETS!
Posted By: i am an idiot
Date Posted: August 17, 2008 at 8:26 PM
I do not understand your problem.
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