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View Full Version : Don't know much about LOC's and Crossovers..


krstofer
07-10-2004, 10:11 PM
Hey, I am trying to figure out what to do with my system. With my old kenwood I had low level outs with NF levels and blah blah..... But trying to use the stock 3's HU has me confused.

I don't know how to use an LOC or a crossover. Where they should go, and what kind to get. I thought I saw some sort of Schematic with the connection flow, but I can't find it now.

Can anyone help?

Thanks,
Krs
jbass
07-11-2004, 01:23 AM
I installed sub and amp with the help of a LOC. I simply removed the HU from its place, connect the speakers to the LOC by partially cutting the wire (just the plastic that envelops the wire). Then you will be able to connect your sub/amp whatever with no problem. For the LOC, when you will remove your HU you will see that it can be easily place under the HU, (where the mp3 is supposed to be).

Then replace everything in place and you will have succeded in your installation. (drunk2)
krstofer
07-11-2004, 05:37 PM
So, I don't need a crossover for my sub? How do I make sure only the lows go to it?

Krs
1sty
07-11-2004, 09:03 PM
So, I don't need a crossover for my sub? How do I make sure only the lows go to it?

KrsIf your amp is worth a damn it will have a crossover built in. If you need something more adjustable then you may want to tink about an audiocontrol Crossover or a new head unit.
krstofer
07-12-2004, 09:03 AM
I have an RF amp and it has cotrols for what levels to pass through, but I wasn't sure if I would need a crossover also. I guess not :)

thanks!
1sty
07-12-2004, 09:23 PM
I have an RF amp and it has cotrols for what levels to pass through, but I wasn't sure if I would need a crossover also. I guess not :)

thanks!
(confused)

What?
"for what levels to pass through"???
can you tell me the amp model number?
I have think your talking about a crossover but I can't be sure.
1Canuck2
07-12-2004, 09:28 PM
Here's a good thread showing how the LOC works.
http://www2.msprotege.com/forum/showthread.php?t=59376
My post is number 14, it has a decent drawing of how the HU/LOC/Amp wiring works.
krstofer
07-13-2004, 10:28 AM
(confused)

What?
"for what levels to pass through"???
can you tell me the amp model number?
I have think your talking about a crossover but I can't be sure.
I think this is the amp, I don't know for sure, but I will check when I take my lunch break.

http://www.cardomain.com/item/ROCG12502
1sty
07-13-2004, 01:14 PM
"The new Punch 250.2 also features a built-in 12dB slope high/low pass variable crossover (50-210Hz)."
krstofer
07-13-2004, 02:13 PM
I found a local place that sell's LOC's is there anything special I should look for? They sell a 2 channel LOC. I assume that means I would need 1 for for the sub and connect to left and right rears.

Correct?
1sty
07-13-2004, 02:15 PM
Aviod the cheap ones. I'd suggest getting them from davidnavone.com to aviod the quality issues with alot of store bought LOCs.

To use with a sub amp wou will need a single 2 channel LOC
krstofer
07-13-2004, 02:16 PM
Here's a good thread showing how the LOC works.
http://www2.msprotege.com/forum/showthread.php?t=59376
My post is number 14, it has a decent drawing of how the HU/LOC/Amp wiring works.
Just looked through this post real quick, I guess I would need one for each set of speakers I amp. are the tweets considered part of the front or seperate?
1sty
07-13-2004, 02:22 PM
Just looked through this post real quick, I guess I would need one for each set of speakers I amp. are the tweets considered part of the front or seperate?
YOu really need one channel of loc per one channel of amplification your using. If you mean factory tweeters or a compenet set, then they will not be a seperate LOC as they are wired with the mids.
krstofer
07-13-2004, 02:31 PM
left and right are two channel, right? So if I amped a sub, rear speaks and front speaks, I would need 3 LOC's.
1sty
07-13-2004, 02:42 PM
no, you would need 4 channels of LOC. You could either us a single 4 channel lock or 2 2 channel LOC. YOU have to remeber what a LOCK does, it takes a speaker leve signal and converts it to an RCA signal. Well at most you only have 4 speaker channels on your radio so at most you could only use 4 channels of LOC. Your 4 channel amp may have an RCA output to link to the sub amp or vice versa. If not, just use 2 RCA Y adapters to make one set of RCAs into 2.
krstofer
07-13-2004, 02:47 PM
Ahhh.. ok I got it now. Phewww... I must be making your head hurt with these questions. i will check the website and compare to what is sold at my local shop.

Thanks again!!
1sty
07-13-2004, 02:51 PM
Ahhh.. ok I got it now. Phewww... I must be making your head hurt with these questions. i will check the website and compare to what is sold at my local shop.

Thanks again!!
I have been answering Audio questions for over a year now, I am immune :D
1Canuck2
07-13-2004, 05:52 PM
You could also go totally ghetto and just run one LOC (outputting a pair of RCAs) and balance/fade everything with your amp gain settings. This owuld mean the fade feature on your HU would be no good, but if you never mess with it much, it is a way of saving some money as a 2 channel LOC is cheaper than a 4 channel LOC.

Robin
1sty
07-13-2004, 06:11 PM
You could also go totally ghetto and just run one LOC (outputting a pair of RCAs) and balance/fade everything with your amp gain settings. This owuld mean the fade feature on your HU would be no good, but if you never mess with it much, it is a way of saving some money as a 2 channel LOC is cheaper than a 4 channel LOC.

RobinThe RCA y adapaters will make up the difference in price most of the time.
krstofer
07-14-2004, 01:23 PM
Well I bought a GSI 4 channel LOC. I do have the 250.2 RF amp that powers a 10" RF HIE2 sub. I can't find the specs for the sub online though. Gonna try to do some work this weekend.


Sorry, it's actually the HE2 woofer. Here is the link.
http://www.cardomain.com/item/ROCRFP3210