Gain for 500/1 using Alpine HU

[tracyrick 10+ year member]

I have the Alpine CDA-9813 and a JL Audio 500/1 amp. I put the volume at 26/35 and did the gain test. I use a DMM and at 2 ohms shot for 31.6volts. I also set the amp at low voltage(?) (other option is high).

My gain is now set to 25% of max based on the test. This seems very low, and indeed my sub sounds weak.

Anyone else have this same setup? I'm curious what gain you use.

Yeah, I know a lot of people say do it by ear, but I want to figure this out first, it's annoying the crap out of me.

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[Hintzyboy 5,000+ posts]

try high voltage and set it again. See if there is a change in volume. But if it distorts, go back to the first setting

 

[tracyrick 10+ year member]

Thanks for the tip, you pointed me in the right direction. I looked up the voltage settings and it looks like 2V is max from the HU for the "low" setting. I have 4V from my HU so I'm going to reset with the high setting on the amp.

 

[Hintzyboy 5,000+ posts]

N/P. Let me know how it turns out.

 

[Motovet 10+ year member]

I used the low setting on both my JL's with 4V pre outs, and it worked fine. I might have to play with that again....