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Old 04-17-2003, 12:39 AM   #1
Wayshie
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Join Date: Dec 1969
Posts: 23
Not enough bass after HU

I have recently installed an Alpine 7894, and before that I had a Alpine MRV100M amp powering a JLW3 10" sub in my trunk. However, after the installation of the HU, I realized that I can hardly hear my sub now especially when I don't have the back seat folded down.

The shop I went to told me that because the Alpine HU is feeding more power to my stock speakers now (so they are louder) and therefore relatively speaking, it would seem like my sub is not as loud at any given volume.....

I just want to find out if that is indeed the case and how can I solve the problem? more power to the sub? or get another sub with more power?

I am also planning on getting the diamond M661 components with a amp so does that mean I won't be able to hear my sub at all since that setup is even louder?

Any input and suggestions will be appreciated because I want to make sure I plan my system correctly...
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Old 04-17-2003, 02:15 AM   #2
Tesh323
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Join Date: Nov 2002
Location: London, England, UK
Posts: 180
My Ride: Mini CooperS
On your 7894, have you got the MX button in the bottom left corner of the unit. If you have and this is turned on, then TURN IT OFF !!!

Hope that makes the sub louder. Also, go into the tone controls, and change the crossovers and sub level.... Anyway, I think you need a more powerful amp for that sub.. i think that W3 10" needs in the region of 250w RMS - your amp only puts out around 100 RMS (I think) - if you want to stick to alpine, go for the M300 or M500 mono class D amps, or a Diamond Audio amp...
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Old 04-17-2003, 06:58 AM   #3
Wayshie
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My sub level is at max already and the amp is feeding the sub 200 rms right now. The low pass filter on the HU now is set to 80 mhz... should I change that?
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Old 04-17-2003, 07:14 AM   #4
Tesh323
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take the MX off... that should solve it, or turn the power IC function off and see how much bass you get through
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