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Old 5th March 2008, 16:13   #1
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Default Why is my woofer so quiet?

I have a sony DV2000 in my Dad's car. I used to drive a JBL sub (a GT4-12) with an infinity Kappa 202A amp, which is a 400 watts X1 amp. While the woofer was driven well, I was nor happy with the quality of bass. My amp has blown a transistor and is waiting for the right part, to be repaired.
Now I have a Kicker C124 woofer in a sealed enclosure. This is being driven by a Pioneer 904 amp, which is bridged into one channel, which as per the manual is 250 watts (rms) X1.
However the woofer seems seriously underpowered and while the base sounds good, it requires really high head unit volume for the woofer to be loud.
I thought that the amp might be problematic and checked the woofer on a Pioneer 5000 D510, with no difference.
Is it that the sub pre-out on the sony DV2000 is seriously low voltage or does my woofer need a much more powerful amp?
I cannot try the Kicker woofer on my Infinity till it is repaired and hence my confusion. Help would be appreciated.
I have posted this twice. Request the mods to delete the other one.
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Old 5th March 2008, 16:23   #2
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Why don't you try and increase the gain on the amp so that it puts out full power at a lower voltage. I think it should help.
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Old 5th March 2008, 16:25   #3
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It works fine with D510?

Tried the gain control on the Pio amp?...904? 944?

Last edited by jkdas : 5th March 2008 at 16:27.
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Old 5th March 2008, 16:26   #4
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Tried turning up the gain on the amp? And does the H.U have an option to increase the sub volume like in the pioneer range??

Edit: @jk, i think both of us replied at the same tim! No i think u should REALLY try it!

Last edited by JayD : 5th March 2008 at 16:27.
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Old 5th March 2008, 16:33   #5
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The 510 amp did not help. Gain is almost at 90%, the SW level in the HU is at max.
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Old 5th March 2008, 16:58   #6
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Exclamation Impedance mismatch

Quote:
Originally Posted by jyobeb View Post
...Gain is almost at 90%, the SW level in the HU is at max.
Then it must be an impedance mismatch : maybe , the sub is of a higher impedance than what the amp requires.
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Old 5th March 2008, 17:22   #7
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Its 4ohms for GT4 .
Try lowering the gain. Was it set at 90% or did you try tuning it?
250W should move a GT4. Did the sub go kaput?
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Old 5th March 2008, 17:34   #8
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Could it be phase mismatch? I mean output of the sub being canceled by other speakers producing bass?
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Old 5th March 2008, 18:33   #9
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Woofer is a 4 ohm unit. Gain was set through trial & error. Have switched the phase too, to no avail.
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Old 5th March 2008, 21:50   #10
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Default Filter selector

Have you checked the selector for the LP/HP (Low/High pass) filter? Maybe it is not set correctly?
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Old 5th March 2008, 23:23   #11
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check woofer impedance. is the Kicker a DVC woofer?
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Old 5th March 2008, 23:39   #12
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Quote:
Originally Posted by navin View Post
check woofer impedance. is the Kicker a DVC woofer?
no. 4ohms.

50-150W...
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Old 5th March 2008, 23:43   #13
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Quote:
Originally Posted by jkdas View Post
4ohms.
It's been checked with a multimeter?
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Old 5th March 2008, 23:51   #14
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Quote:
Originally Posted by navin View Post
It's been checked with a multimeter?
googlemeter :P

Was thinking if he fed it with too much power as I read that it takes only upto 150W RMS .
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Old 6th March 2008, 00:01   #15
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If I am not wrong here Pioneer 904 is not 250 watts in bridged mode.
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