takes awhile for amp to cut completely on

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jmelton86

Gold - Posts: 1,228

Joined: February 07, 2007

Location: South Carolina, United States

Posted: October 31, 2007 at 10:34 PM / IP Logged

I have 2 JensenJPA285 (I know) 2channel (250x1 @ 4ohm, CEA) -each bridged to their own coil of my Boston G51044(dual 4ohm). It's getting about 500Wrms.

Anyway, when I turn them on it takes them about 15seconds to turn all the way on. It's like in steps -it gets louder in steps until all the way on.

Any ideas?

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

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i am an idiot

Platinum - Posts: 13,670

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: November 01, 2007 at 6:03 AM / IP Logged

It takes that long for the Hamsters to mount the wheel and get it up to speed. It sounds like they may be using some kind of Soft-On technology. Common in some older more costly amps. But maybe since Audiovox bought them they may be trying some new things.

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coppellstereo

Silver - Posts: 785

Joined: November 21, 2005

Location: United States

Posted: November 01, 2007 at 1:10 PM / IP Logged

Maybe try turning them on with a test tone playing - then you could hear/measure what is going on.

Could be the amp OR the headunit - how are your HU and amps connected? RCA or high level?

You might want to measure their output during the 'boot up' stage

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ninefoot3

Member - Posts: 3

Joined: October 28, 2007

Location: Florida, United States

Posted: November 04, 2007 at 8:53 AM / IP Logged

Owned a Jensen (06 model) 4ch amp that took about 2-3 seconds to power on. I'd hear bass in all of it's solitude while my Jensen amp took it's time juicing up the rest of the speakers. Seems to be a characteristic of the beast.

I ditched it and got a 4ch Alpine. Sound is amazing in comparison. Even with a lower wattage rating.

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jmelton86

Gold - Posts: 1,228

Joined: February 07, 2007

Location: South Carolina, United States

Posted: November 05, 2007 at 5:56 PM / IP Logged

i am an idiot wrote: It takes that long for the Hamsters to mount the wheel and get it up to speed.

Ahahaha! I thought it could be something like that!

coppellstereo wrote: Maybe try turning them on with a test tone playing - then you could hear/measure what is going on.

Could be the amp OR the headunit - how are your HU and amps connected? RCA or high level?

It does it with any music. I actually noticed it with a bass note that holds for awhile -I don't think it'd be as easy with rock or something...

RCA's. My other amp (ClarionAPA2104 -RCA's also) that long, or in steps.

I figure it could be some kind of soft turn-on thing -or crappy capacitors. (I don't know much about internals - if that sounds dumb!).

2013 Kia Rio -90a alternator

DDX470HD GTO14001 GTO1014D (x3)

Big3 in 1/0G

1/0G to GTO14001

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takes awhile for amp to cut completely on

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