Deck + Amp Problems

[insaini]

When i turn the volume up on my deck to about a little less then half way ... my deck and amp both keep turning on and off untill i put the volume back down. What could be causing this? ... i changed the amp ... still the same problem ...

I have a

JVC KD-SH77 Deck

Clarion DPX1001.2 AMP

and 2 Rockford Fosgate P212S4 SUBS

anyone know what the problem could be?

here are the specs for all three .....

SUBS -

Size: 12 inch

Rec. Sealed Box Dims: 0.85 - 0.85 cu. ft.

Rec. Ported Box Dims: 1.25 - 1.25 cu. ft.

Sensitivity: 86 dB

Recommended RMS Power: 200W

Peak Power Handling: 400W

Impedance: 4 ohms

AMP -

Amplifier Type: 2-channel

RMS Power @ 4 Ohms: 250W x 2 @ 4 Ohms

THD at 4-Ohm RMS Power: 0.5 %

Bridged RMS Power @ 4 Ohms: 900W x 1 @ 4 Ohms

Speaker Level Inputs: yes

Preamp Outputs: no

Built-In Crossovers: LP

Bass Boost: 0 - 15 dB

Frequency Response: 20-20,000 Hz

Signal to Noise Ratio: >95 dB

Fuse Rating: 80 amps

DECK -

Key Features

Player Type CD

Controlled Devices CD Changer

MP3 / WMA Playback MP3 Playback

Amplifier / Speakers

Built-In Power Amplifier Yes

Built-In Amplifier Power 4 x 50 Watt

Radio

FM Presets 18

AM Presets 6

Tuner Type FM / AM

Click to read more...

 

[Prowler573 5,000+ posts]

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Welcome to the forum.

Just at a guess having nothing more than the minimal info contained within your post I would say it's a voltage issue (ergo: when you have the volume up somewhat high the current being drawn by the amp is more than your vehicle is capable of supplying and consrquently it causes the equipment to shut down due to lack of power)

What kind of electrical does your car have?

How big is the battery?

Do you know what amperage your alternator is rated for?

What size cabling are you feeding current to that amplifier with?

 

[insaini]

i have a 1999 pontiac grand am gt

 

[insaini]

would i have to buy a cap?

 

[insaini]

when i do have the volume up ... only the deck and the amp shuts off... but if i have a light on .. it doesn't dim or anything ...?

 

[KaeZoo 10+ year member]

My guess is that the deck shuts off due to a voltage problem, and the amp shuts off because the deck shuts off.

You need a multimeter for any serious troubleshooting, but make sure your head unit has a good ground and a secure connection on the yellow wire.

 

[insaini]

ive had a system in this car since 2002 and it was good then ... i could turn it up all the way and no problems ... this started happening a year ago .. and i cant seem to fix it ... one day i had the volume up and it just started turning off ...