HUGE Voltage drop when head unit turned on!!

[Daipone]

Hey everyone this is my first problem i face in my sound system i am not installer but i need to figure out the problem..

my electrical :

Mechman 200a + front optima yellow top + rear req battery ( 1/0 big 3 )

RE XXX 18" running 2600 Hifonics at 1-ohm and small pioneer amplifier for component speakers

with head unit off i have 14.2 volt in my voltmeter when i turn on the head unit the voltage dropped to 13.3 my amplifiers are work no problem but this is much current draw for idle amplifier i did't face this problem before do i have bad ground or bad remote wire i hope it's not somthing major

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[dbjunior 10+ year member]

Sounds like bad ground id recheck the whole big 3 also check voltage with dmm at alt front batt , rear batt and amps this will help you figure out where the bad connection is

 

[Daipone]

i will check it in the morning but can bad remote wire lead to this problem or does't matter?

 

[mdiscala 10+ year member]

Bad remote wire would either not turn amp on or an intermitante signal would turn amp on and off

 

[Daipone]

I notice somthing weird when i move the RCA behind my headunit my voltage get drop and increase am not sure if it's bad rca or bad ground

before my voltage 13.0 when i move some wire randomly now i got 13.6 weird Rca anybody tell me what's the problem

 

[dbjunior 10+ year member]

Are you using a volt meter or watching factory gauge

 

[Daipone]

i use stinger voltmeter i did't face this problem before now it's weird my head unit draw 0.8 ampere but i move some wires and increased alil bit is it bad ground or rca problem my dashboard get allot of shakin during driving maybe somthing went wrong