low level inputs on a 4ch!

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TheevesLLC

Member - Posts: 41

Joined: August 02, 2003

Location: Washington, United States

Posted: November 23, 2003 at 2:30 PM / IP Logged

the car is a 97 mazda protege. i am installing a power acoustik ov4600 amp and spx 280w 6x9 and spx 200w 6.25" to that amp. the owner still wants to use the factory head and cd accessory, which is fine however it has no highlevel (RCA) output, nor does it have an amp remote lead. i have channeled all the speakers from the head to the low-level input plug on the amp, and tapped the 12v assy lead for the amp remote lead. at first, this worked fine, sounded decent, so i began to fuxor with the xovers and gain.

now the amp cannot maintain power, it will show the protect led for a second, then cut on, then jump back to protect, providing about 1-2seconds of music per cycle. my first thought was power/ground, however i have thoroughly checked all power/ground connections, to no avail. my second thought is that perhaps i should replace the factory radio fuse with one of higher amp rating, but if that's the problem shouldn't the fuse just blow?

i've never done a low level input amp install before, and this isn't proving a victorious first!

any ideas?

thanks

connor

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: November 23, 2003 at 4:36 PM / IP Logged

If you're using the speaker feeds from the factory head unit to the amp, that is the high level inputs. Your gain is much too high on the amp. It has nothing to do with fuses. Turn the amp gain all teh way down, set the factory head unit to about 3/4 volume, then turn the gains up slowly until you can detect distortion, then back them off until it is clear.

TheevesLLC

Member - Posts: 41

Joined: August 02, 2003

Location: Washington, United States

Posted: November 23, 2003 at 6:08 PM / IP Logged

high level inputs, my mistake... it is not the gain on the amp, i have turned the gains all the way down, i have tried multiple crossover configurations which would require the least power too. there is no distortion when the amp turns on, it plays loud and clear, and then cuts off.

thanks anyway, anybody else have any ideas?

connor

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: November 23, 2003 at 6:38 PM / IP Logged

Could be a defective amp. I've never had much luck with Power Acoustic.

TheevesLLC

Member - Posts: 41

Joined: August 02, 2003

Location: Washington, United States

Posted: November 23, 2003 at 6:51 PM / IP Logged

hmm. i sell many gothic series power acoustik amplifiers, i've not had one returned yet. i have tried the amp in my car, it works properly there. i suppose i'll just redo all of my connections and cross my fingers

DYohn

Moderator - Posts: 10,741

Joined: April 22, 2003

Location: Arizona, United States

Posted: November 24, 2003 at 8:37 AM / IP Logged

If you're sure the amp is OK, try disconnecting the speakers and hooking everything up to check that the speaker load is not too low an impedence. If the amp is stable with no load on it, try connecting the speakers on at a time as you may have a bad speaker or a bad speaker wire. Check all your connections and be sure there are no stray wires that can short to ground, make sure the head unit is not putting out too much power for the amp's high level inputs, make sure your xover gains are not set too high. In fact, how are you using high level signals from your HU and using Xovers? Or do you mean the Xovers built into the amp?

TheevesLLC

Member - Posts: 41

Joined: August 02, 2003

Location: Washington, United States

Posted: November 24, 2003 at 8:23 PM / IP Logged

using the amps internal xovers. although i could have some 80s highlevel crap. the first time the amp went berserk, i tried disconnecting the speakers, and it still wasn't happening. i'm almost positive the output of the head is 15x4, and i have checked the wiring. i'm just going to yank power/grounds and reinstall them.

thanks for your help

Connor

auex

Platinum - Posts: 5,041

Joined: December 23, 2002

Location: Arizona, United States

Posted: November 24, 2003 at 9:44 PM / IP Logged

Are you using a line output converter ( high to low coverter, speaker to rca), or did you just wire rca ends on to the speaker wires? If you just wired rca ends onto the speaker wires that is your problem.

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TheevesLLC

Member - Posts: 41

Joined: August 02, 2003

Location: Washington, United States

Posted: November 25, 2003 at 12:06 AM / IP Logged

see the first post auex

auex

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Joined: December 23, 2002

Location: Arizona, United States

Posted: November 25, 2003 at 8:41 AM / IP Logged

TheevesLLC wrote:

i have channeled all the speakers from the head to the low-level input plug on the amp, and tapped the 12v assy lead for the amp remote lead.

i've never done a low level input amp install before.

It says nothing about how you connected the speaker level(high) to the amps low level inputs. So please re-read your first post.

Certified Security Specialist

Always check info with a digital multimeter.

I promise to be good.

Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

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