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possible ground issue


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I just wanted to get a feel about what you guys think this sounds like. I recently installed my sub, amp for the sub and all electrical components to pull this off. I have a DC power 270 XP alt, a Xs Power D3400 and 2 D975's in the back, my lights are still dimming though when i drop the knob. With my batteries and alt, should my lights be dimming, im only running a T20001bd to the sub. do i have a ground problem? im charging 15.1 cold and dropping 14.8 ish at idle hot. Thanks in advance for comments and advice.

Build in progress:

Kenwood DNX890HD

Rockford Fosgate White wolf RCA's

2 Rockford Fosgate T400.4 on RF fanatic q components (6.5 in the kick, 6.5 in the front doors, 5.25 in rear doors)
2 Rockford Fosgate T2500's on sub

1 Fi car audio Team 15 D1

XS Power D3400 and three D975's in the rear

Mechman Elite 370

Stinger power connections and cable

RockFord_Fosgate-1-1.png

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early morning bump?

Build in progress:

Kenwood DNX890HD

Rockford Fosgate White wolf RCA's

2 Rockford Fosgate T400.4 on RF fanatic q components (6.5 in the kick, 6.5 in the front doors, 5.25 in rear doors)
2 Rockford Fosgate T2500's on sub

1 Fi car audio Team 15 D1

XS Power D3400 and three D975's in the rear

Mechman Elite 370

Stinger power connections and cable

RockFord_Fosgate-1-1.png

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Could be a bottleneck issue...

Have you done your big 3? And if yes, are you grounded to the chassis or did you run a negative?

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Chassis Ground I personally think (and i am no expert here so please dont take offense) but i think a ground run from the front to the rear is just a bit of overkill.

Build in progress:

Kenwood DNX890HD

Rockford Fosgate White wolf RCA's

2 Rockford Fosgate T400.4 on RF fanatic q components (6.5 in the kick, 6.5 in the front doors, 5.25 in rear doors)
2 Rockford Fosgate T2500's on sub

1 Fi car audio Team 15 D1

XS Power D3400 and three D975's in the rear

Mechman Elite 370

Stinger power connections and cable

RockFord_Fosgate-1-1.png

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Share on other sites

I just wanted to get a feel about what you guys think this sounds like. I recently installed my sub, amp for the sub and all electrical components to pull this off. I have a DC power 270 XP alt, a Xs Power D3400 and 2 D975's in the back, my lights are still dimming though when i drop the knob. With my batteries and alt, should my lights be dimming, im only running a T20001bd to the sub. do i have a ground problem? im charging 15.1 cold and dropping 14.8 ish at idle hot. Thanks in advance for comments and advice.

IT could be that the amp you have pulling more power than your electrical. I know the RF amp draws alots of power. If you dropping from 14.8 wouldn't hurts that much. Any below than that wouldn't be too good. How bad are you light dimming? Have you done the big 3?

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IT could be that the amp you have pulling more power than your electrical. I know the RF amp draws alots of power. If you dropping from 14.8 wouldn't hurts that much. Any below than that wouldn't be too good. How bad are you light dimming? Have you done the big 3?

They dim like a bitch kid LOL. I have the big 3 done, even with extra ground leads between the ground points under the hood. im thinking that this amp is just pulling alot of current. at full tilt, i do not drop below 14, but my lights just dim, its nucking futs HAHA

Build in progress:

Kenwood DNX890HD

Rockford Fosgate White wolf RCA's

2 Rockford Fosgate T400.4 on RF fanatic q components (6.5 in the kick, 6.5 in the front doors, 5.25 in rear doors)
2 Rockford Fosgate T2500's on sub

1 Fi car audio Team 15 D1

XS Power D3400 and three D975's in the rear

Mechman Elite 370

Stinger power connections and cable

RockFord_Fosgate-1-1.png

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is this at idle or while yoour rpms are up

2003 CHEVY SILVERADO REG CAB

H/U SONY W/ IPOD TOUCH

new build

2 dc audio lvl4 xl's

rd audio 3250

box is behind the seats

below the window

3.44 after tuned@34 htz

147.3@44 htz & getting louder

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mainly at idle, which i would expect, but it does happen at running speed also, but not nearly as bad.

Build in progress:

Kenwood DNX890HD

Rockford Fosgate White wolf RCA's

2 Rockford Fosgate T400.4 on RF fanatic q components (6.5 in the kick, 6.5 in the front doors, 5.25 in rear doors)
2 Rockford Fosgate T2500's on sub

1 Fi car audio Team 15 D1

XS Power D3400 and three D975's in the rear

Mechman Elite 370

Stinger power connections and cable

RockFord_Fosgate-1-1.png

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wear do you have your gain set

thats a reaally big amp

Edited by DirtyD78

2003 CHEVY SILVERADO REG CAB

H/U SONY W/ IPOD TOUCH

new build

2 dc audio lvl4 xl's

rd audio 3250

box is behind the seats

below the window

3.44 after tuned@34 htz

147.3@44 htz & getting louder

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It shouldn't dim with all of that on that much power! Ground off of your alt if possible

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