Help with amp issues!

**justchat_1** · 11-03-2009, 09:41 PM

I'm tired so I could be off but wouldn't a 2ohm load at 70 watts deliver more power then a 4ohm load at 100 watts (P=I^2R)? Granted thats peak...RMS would be equal but I would think that would still make a difference?

**tripzero** · 11-04-2009, 04:26 PM

Originally Posted by justchat_1

Pre-amp may help you but so may a different configuration. If those are 4ohm subs they can be wired in parallel and deliver twice as much power. I would say the best option is to see where your starting from.

The were originally wired in parallel. So they may just be 4ohm subs.

**soundman98** · 11-04-2009, 04:43 PM

Originally Posted by kev000

The were originally wired in parallel. So they may just be 4ohm subs.

...which would be a 2ohm load, and would cause it to overheat a lot, and cause it to shut off

my sony sub amp is the same way-- it is not 2 ohm stable, but i have hooked it up for fun in 2 ohm mode for 15-30 min and then it will go into thermal protection...

time to break out the DMM and double check.

**justchat_1** · 11-04-2009, 08:56 PM

Originally Posted by soundman98

time to break out the DMM and double check.

**audiophyle_247** · 11-05-2009, 03:19 PM

What is the crossover filter set to on the amp?
Ive seen people bring amps in because it sounded like **** when the problem was because they had the gain & bass up to max & the crossover set all the way down to 20hz.

The amp isnt a powerhouse, but Kenwood subs dont need a lot of power anyway.

**tripzero** · 11-05-2009, 05:03 PM

Originally Posted by audiophyle_247

What is the crossover filter set to on the amp?
Ive seen people bring amps in because it sounded like **** when the problem was because they had the gain & bass up to max & the crossover set all the way down to 20hz.

The amp isnt a powerhouse, but Kenwood subs dont need a lot of power anyway.

when i had the gain all the way up, i hadd the crossover set all the way down. Now that I've got very little gain, i get more out of them when I have the crossover higher at like 180-200. But still, not enough kick to really even notice

**audiophyle_247** · 11-05-2009, 05:14 PM

Putting the crossover all the way down literally blocks out the bass, you never want to do that. Set the slider to LPF & put the crossover dial about in the middle (100~120hz or so), then adjust the gain setting.

If it was loud enough but sounded bad with the gain maxed & the crossover turned completely down, raising the crossover should fix the problem & actually give you more volume. Unless you are confusing the crossover with the bass boost, which are two entirely different things.