Amp settings??

[Aaron Douglas]

I just installed my subs and amp. The amp is HFi1500D and the subs are HFX12D4. I have them wired parallel and 1ohm. The bass knob was max, volume 34 out of 40 on my deck, all decksettings flattened. Tuned the amp too 28hz with a DMM. When done I hooked my subs up to amp and listened for a bit. With music I am familiar with and compared to a smaller amp with kicker cvr 12's I had before, these should be hitting harder than they are. Any suggestions on what to look at to fix the issue?????

[JeremyC]

Boost knobs are the DEVIL!!!!!!!!!!!!!!!!!!! I just looked up your amp, thats not a bass knob, its a boost knob. I would trash the damn thing. But thats just my personal opinion.

You probably used a 40 or 50 HZ tone to set the gain. And your boost knob happens to be in the 45 hz range. With it maxed you boosted that area by 10db. So it might show 28 volts, but the rest of your freq range is probably around 3.5 volts.

Turn the bass boost to zero. Use a -5 or -10 db 50 hz tone and reset your gains.

Let us know how it works out.

[Robert Wollenberg]

Did you mean 28 hz or 28 volts? Other things that could contribute to the discrepancies are enclosure type and build quality, what amp you had before, size of wiring, output of alternator ... all these things combined could lead to problems ...

If the old amp may have been more efficient than the new amp, and if it's power rating was only marginally lower than the new amp, they'd both be maxing out the capabilities of your electrical system, but the old amp would have made more power with it.

There's a whole crap ton of variables that could be contributing to this. It's also possible that's just your imagination. Your old system could have been distorted as hell, which is often misinterpreted as louder. Your new setup may be cleaner and therefor seems less loud than the old setup.

Was this installed in the same vehicle as the old setup? That could cause a whole new bunch of variables.