advice on new amp

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jjl2191

Member - Posts: 13

Joined: April 14, 2004

Location: New Zealand

Posted: April 14, 2004 at 10:26 PM / IP Logged

hi all. i desperately need some advice on my new amp. i ought this Pioneer GMX424 4 Ch amp off a guy to drive a 12" sub. When he was testing it, it run perfectly, but when I got home it just doesn't work. I got 8 gauge wires for power and ground. The power indicator on the amp blinks but there's no sound. does anyone know anything about this? cheers

Ketel22

Silver - Posts: 976

Joined: August 23, 2003

Location: United States

Posted: April 14, 2004 at 10:30 PM / IP Logged

how did you run the amp to the sub, usually people dont reccomend running a 4channel amp for subs.

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jjl2191

Member - Posts: 13

Joined: April 14, 2004

Location: New Zealand

Posted: April 14, 2004 at 10:40 PM / IP Logged

i bridged channel A. but the thing is even i cant get the best result from the running a 4 channel amp for a sub, at least the power should be on. i looked everywhere in the manual it doesnt say anything about flashing power indicator.

Ketel22

Silver - Posts: 976

Joined: August 23, 2003

Location: United States

Posted: April 14, 2004 at 10:43 PM / IP Logged

it may be due to an insufficient ground, or an overload as far as the ohm's go. have you tried to power it on without your sub attached?

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Ketel22

Silver - Posts: 976

Joined: August 23, 2003

Location: United States

Posted: April 14, 2004 at 10:49 PM / IP Logged

also what is the model and make of the sub?

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jjl2191

Member - Posts: 13

Joined: April 14, 2004

Location: New Zealand

Posted: April 14, 2004 at 10:52 PM / IP Logged

no, i haven't tried that. and the positve lead is about 5 meters long. i really dont want to cut it until i got the amp sorted and decided where i'm going to put it. i've also got some 14 gauage wires, do u think i can use that to test it? cheers

jjl2191

Member - Posts: 13

Joined: April 14, 2004

Location: New Zealand

Posted: April 14, 2004 at 10:56 PM / IP Logged

it hasn't got any writing on the sub itself. the only reason i bought it was because it's in a really NICE enclosure with lights flashing. i think the sub itself is crap. i'm thinking of getting a new sub but at the moment i have to save for a while.

Ketel22

Silver - Posts: 976

Joined: August 23, 2003

Location: United States

Posted: April 14, 2004 at 11:02 PM / IP Logged

14 ga is fine for most any setup, but you should really try to power the amp on with no speakers wire attached, then you need to find out what the sub is because as if right now with that amp its not going to get even 70wrms.

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jjl2191

Member - Posts: 13

Joined: April 14, 2004

Location: New Zealand

Posted: April 14, 2004 at 11:11 PM / IP Logged

i bought the sub and amp off the same guy and he used the same setup to test it. it was fine. but i'll take ur advice and try it without the sub and see what happens. do u think the blinking meant not overload?

Ketel22

Silver - Posts: 976

Joined: August 23, 2003

Location: United States

Posted: April 14, 2004 at 11:15 PM / IP Logged

ive personally never used a pioneer amp so im not sure, but i assume the blinking like is caused by either the subs impedence is too high for the amp, or you dont have a good enough ground so the power to the amp is not very strong.

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