waltonscott

iTrader: (1)

Hey Guys,

I have an ALPINE CDA9811, and a Kenwood KAC-X811D amp. (and an additional kenwood for speakers)

First off, do the 4 V preouts on the HU translate to exactly 4V on the amp's input sens? Or is there any conversion? I set it to 4v on the amp, but it seems as if its utilizing hardly any power...since 4v is all the way to the left on the dial.

Second, I have a pyle active crossover between the hu and amps, what should I set my high pass / low pass frequencies at? (Not sure if you need more info to answer that)

Thanks,

S

GPGT1

Can your active crossover take a 4v input? As far as setting your freqs set them to the speakers specs between mid and tweet. Subs are up to you, I have my 10" subs set at 100hz

waltonscott

iTrader: (1)

Yea it takes a 4v input

BigRedGuy

iTrader: (11)

Without knowing anything more about your setup........

The crossover should pass whatever voltage it gets at the inputs straight thru to the amp inputs.

As a starting point, set both frequencies to 80hz and the output levels on the xover to maximum. Unplug the sub outputs and listen to the mids and highs first. As you raise the volume level, eventually you will hear distortion from the speakers. Lower the volume back down until it goes away, raise the frequency on that output from the xover, and turn the volume back up a little to determine if the distortion happens at the same volume level. Once you have determined how low a frequency the speaker can handle, you can adjust the gain on the amp a little at a time to raise the volume level. You will have to "fiddle" with it a bit until you are able to get as much sound as you can out of the speakers without distortion.

Repeat the process with the subs. The object is to get the most sound with the least distortion. If you are not sure how to do this, an hour or so at a shop should get it set up properly. Until this is done you won't be sure you're getting as much as possible out of your equipment.

This is a very simplified description of the process, there is a link to a much longer version on the net, but it has eluded me at the moment.....

HTH

waltonscott

iTrader: (1)

Thanks for the info, the only problem is...I can turn it all the way up without distortion. On the active crossover I have the subwoofer gain to the max, and on the amp for the sub I have the input sens at 4 V. My question is, how lower can I put the input sens before it could damage the sub / amp? It starts off at the left of the dial at 5 V, then on the far right it has .2 volts. At 4 V it doesn't hit nearly as hard as say 1 v or .5.

What do you think?

hott-nix

iTrader: (7)

hey scott

i think you would be better off removing the crossover from the equation and using the crossovers built into the head unit and amps. they really are superior to that active crossover. also, with my experience with my 9815, you need to crank sub level to the max on that series of decks to get good bass output.

i don't know how you are having so much trouble with your amp/sub setup, i had no trouble when i had that amp in my system.

waltonscott

iTrader: (1)

Thanks albert,

I was just thinking that this morning, bypassing the crossover to the sub. My speakers are running off the front channel anyway (2 ch amp).