Carputer, 3 amps, 2 way active?

**ralphyboy1** · 07-07-2005, 11:42 AM

Just to throw somthing in here. When I build my systems I use 1 channel per speaker, it is a huge hassle but I feel the absolute control you gain is worth the pain

Again my personal preference with a 6 1/2, tweeter, sub, configuration would be to full pass the seperates. I can't say enough about using a three way setup rather than a 2 way though, with 5 1/2's, tweeter, and an eight for the mid bass in that case I cut the 5 1/2 at 120-150 depending on the speakers and the eights would low pass at the same. It's all personal preference though and I got beat by plenty of "normal setups"

**GreenBeast** · 07-07-2005, 12:07 PM

thanks.
i'll be runnign 6 1/2s and tweeters and will have a 12" sub in the back.

what pass would i run the components at? full or high?

**ralphyboy1** · 07-08-2005, 02:37 AM

In that case, unless I was having a problem with distorting the low freq, I would run full pass. You can always change it later if you don't like it.

**GreenBeast** · 07-08-2005, 05:22 AM

true. thankyou

**ralphyboy1** · 07-08-2005, 03:01 PM

No problem.

**RFMan** · 07-08-2005, 03:01 PM

Originally Posted by sdashiki

But with component speakers that come with crossovers is it not better to simply run the amps output at full range to the crossover and have IT do the freq. work powering the woofer and tweeter from 2 channels...? Which is what you proposed to do with the back speakers anyway...

I realize no that I missed a few details. For one, I run no tweeters in the rear channels. They are for rear fill only and are not needed. The 5 1/4" speakers I use fill that need by themselves.

As for the advantages of using 2 channels for the front tweeters only, there are a few that come to mind:

-In my case, I bought the woofers and tweeters seperately from 2 different companies (Illusion audio and LPG), and I did not have a crossover for them. So using the crossovers on the amps haves me from buying an active one or building a passive one.

-I like to be able to control the gain on my tweeters seperately from the woofers Although I initially set the maximum gain on my amps with an oscilloscope, I've often found myself backing off the gain on the tweeters more than for the other speakers because they are usually more efficient, andd too much highs hurt my ears.

-Passive crossovers are inherently lossy. Active ones are not. While this doesn't matter much for the tweeter, I like to get all the power I can to my woofers.

**ralphyboy1** · 07-08-2005, 03:07 PM

RFMAN, you have a ref 650 don't you. I have had one for a couple of years now just laying around till I build my next system (which is waiting for a suitable car

)

**ralphyboy1** · 07-09-2005, 08:32 PM

Originally Posted by C4M

Wow. There is some really low quality advice in this thread. If I was a mod I'd just delete it - it offends my eyes.

I think the thread was over as it was, and forgive me if I take this comment personally as I reread your "low quality advice" and saw nothing wrong with any of it so I must be a giver of this offending advice also. I don't understand this comment

I don't see the point in wasting effort generating all that signal given the amp config you described. IN the same way, I don't understand people that purposely make their subs or splits *less* efficient by running them full range. It's mental!

Nobody was speaking about crossing over the subwoofers that is a given and depending what configuration you are running it is perfectly acceptable to run full pass on the seperates. Next time just give the advice without the flames.

**C4M** · 07-09-2005, 11:54 PM

Originally Posted by ralphyboy1

II reread your "low quality advice" and saw nothing wrong with any of it so I must be a giver of this offending advice also.

Take a pill. It's not all about you.

Deal.

**GreenBeast** · 07-10-2005, 06:41 AM

well i have decided to get rid of my 2 amps and just get a 6 channel to replace them

i had a remeasure in the boot/trunk and fitting everything was gonna be tough

so i'm just run components front and back with passive crossovers and a sub bridged on the last 2 channels

i this case should channels 1-4 be run full pass or high pass?

i haven't measured the output voltages yet, i'm running a pc chips flex-ATX board.
however i'm liking the control and adjustability of the higher end sound cards, revolution5.1/audigy, etc