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I have two sundown 3500s strapped on two dc xl 15s and i have a bad engine whine in my subs. it started maybe 2 days after i strapped them together. i have the big 3 and i cant think of any reason why i still have the noise. can somebody on here please give me some more options to check?

Ride-1996 Toyota 4Runner Limited Edition

Head Unit-Alpine iXA-W404

Front Speakers-Memphis M-Class 6 1/2 Oversize

Subs-2 DC Lvl 4xl 15's

Amps-2 Sundown 3500d's

Batteries-2 Batcap 2000's

240 amp Iraggi Alternator

Wiring-Memphis 0 Gauge Kit

Extra-Compustar Alarm/Remote Start/Keyless Entry

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i have it grounded to the battery up front and the chassis which is sanded down and everything. where else should i ground it

Ride-1996 Toyota 4Runner Limited Edition

Head Unit-Alpine iXA-W404

Front Speakers-Memphis M-Class 6 1/2 Oversize

Subs-2 DC Lvl 4xl 15's

Amps-2 Sundown 3500d's

Batteries-2 Batcap 2000's

240 amp Iraggi Alternator

Wiring-Memphis 0 Gauge Kit

Extra-Compustar Alarm/Remote Start/Keyless Entry

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Did you ground the head unit?

it's grounded in the harness.

Ride-1996 Toyota 4Runner Limited Edition

Head Unit-Alpine iXA-W404

Front Speakers-Memphis M-Class 6 1/2 Oversize

Subs-2 DC Lvl 4xl 15's

Amps-2 Sundown 3500d's

Batteries-2 Batcap 2000's

240 amp Iraggi Alternator

Wiring-Memphis 0 Gauge Kit

Extra-Compustar Alarm/Remote Start/Keyless Entry

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mine's currently doing the same exact thing(though I have 2 amps and a cap connected to the same screw on the frame, could that be my problem? do you have several connected to the same frame like I do?

2004 Volkswagen GLI

1 10" Skar VVX

^^^ Looking for an amp to run it, Pm me if you have one ^^^

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i have a ground from the front battery to the back battery and then one off the batteries to each amp. what gets me is it took two or three days before it started happening

Ride-1996 Toyota 4Runner Limited Edition

Head Unit-Alpine iXA-W404

Front Speakers-Memphis M-Class 6 1/2 Oversize

Subs-2 DC Lvl 4xl 15's

Amps-2 Sundown 3500d's

Batteries-2 Batcap 2000's

240 amp Iraggi Alternator

Wiring-Memphis 0 Gauge Kit

Extra-Compustar Alarm/Remote Start/Keyless Entry

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  • 7 months later...

Sorry for bringing this back up but Im having the same problem as well. Did you figure it out? I have 2 runs of 1/0 from front battery to the back. Thought that was the best ground. I unhooked those 2 wires and hooked a single to the rear seat bolt and whine went away. Then I tried took hook up all 3 and as soon as I added the ones from the front battery noise came back. Im just confused as I thought multiple runs from the front to rear would work.

Team DOA

Team gg

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sometimes it can be unavoidable or too hard to find, i used to have the same problem. i picked up a line driver and my problems were solved.

1999 Monte Carlo

Sony CDX-GT34w

2 Alpine Type R 12"s in 4 cubes tuned to 35hz

American Bass VFL 80.1 amp @ 1 ohm (probably doing between 1000 and 1300rms)

Stock alt, Stock batt, Big 3 Upgrade

Boston s55- 5 1/4s (doors)

Boston s95- 6x9s (rear deck)

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