LOC troubles

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meh66

Copper - Posts: 266

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Joined: October 26, 2003

Location: United States

Posted: November 13, 2006 at 12:21 PM / IP Logged

Hello,

I installed two amps to a factory head in an 03 Mazda 6. However, I am having some issues adjusting the LOC. I just read a few post on how to adjust and test, so I will try that tonight. I still had some questions. Just so you know the LOC is pac and amps are visonik. I know they are not the best, but it is not for me. LOL. Here is what I did, I used two locs( front and rear) and off the rear, I used y adapters to tie in the sub amp. The four channel amp do not have a pass thru, but the sub amp does. I was thinking about connecting the rear loc to the sub amp and then drive the four channel amp from the front loc. I just wanted to know if that was a good idea? Off course I will make my measurements. I wanted to know where I could quickly get a cd with the different tones. I am open to any suggestions.

MEH66

"Car Performance and Mobile Electronic Enthusiats"

boulderguy

Silver - Posts: 510

Joined: April 17, 2005

Location: United States

Posted: November 13, 2006 at 3:32 PM / IP Logged

The two variables I see here are using the fader to adjust F - R volume or sub level and whether or not to use the sub amp's X-over, assuming that passthru is crossed over.

As to the answers to those questions, who cares what I think - it's all about what you want.

Test CD - google "tone generator," you'll find some freeware out there. Or Amazon.

stevdart

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Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: November 13, 2006 at 7:07 PM / IP Logged

I suggest you use that full-range passthru that the sub amp provides (it should always be full-range, not affected by sub's crossover).

Connect one LOC to the front speaker wires. This is to provide signal for the sub amp and channels 1 and 2 of the four-channel amp. Connect sub full-range out to channels 1 and 2 in, and no Y adapters are needed...just short RCA cables. Connect your front speakers to these channels. (If, for some reason, the sub amp's passthru is not full-range, you would use the Y-adapters here.)

Connect the other LOC to the rear speaker wires. Connect to channels 3 and 4 for the rear speakers. Your deck's fade control will fade down the rear speakers without taking the sub's signal down with them. BTW, one four-channel LOC would do the job instead of using two stereo LOCs. Make sure you use ones that are rated "high quality".

http://www.linkwitzlab.com/burst-cd.htm is a professionally-produced test tone CD.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

boulderguy

Silver - Posts: 510

Joined: April 17, 2005

Location: United States

Posted: November 13, 2006 at 9:18 PM / IP Logged

See, I'd go the other way with it. I'd do one LOC to the 4 ch amp & run fr & rr off that alone, then use the other LOC straight to the sub amp. Set the gains to adjust the front-rear balance, then use the fader as a sub volume controller.

I'd do that b/c I tend to adjust the sub volume more than the front to rear balance. But again, it's about what's more important to you.

Stevdart's test CD there is sweeps & steps, I'd use something more consistant, like this. Admittedly these things are kinda hard to find, when you get one hang onto it!

meh66

Copper - Posts: 266

Joined: October 26, 2003

Location: United States

Posted: November 14, 2006 at 7:14 AM / IP Logged

Thanks everyone for your valuable input. I did not get to read your responses until after I completed the job. Customer was happy. I used boulderguy method, but on the next install I will use a four channel loc. BTW, where do I get a quality LOC (four channel and 2 channel) because my local supplier is selling crap.

MEH66

"Car Performance and Mobile Electronic Enthusiats"

stevdart

Platinum - Posts: 5,816

Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: November 14, 2006 at 6:12 PM / IP Logged

http://www.davidnavone.com/ makes a variety of quality adapters. You might look into buying up a few of these 4 channel LOCs while they're on special.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

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LOC troubles

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