SgtRodriguez Posted May 12, 2010 Report Share Posted May 12, 2010 Alright I have a question. I have a 2002 Mitsubishi Mirage LS Coupe that not to long ago I replace all of the sound system. I have JL Audio in the doors and back, and I know I will catch some heat for this a Dual (brand) Sub-woofer in the trunk. The 4 speakers are powered by a JL Audio e4300(45wX4 4ch), my sub by the ol RF Punch 501s (1500w 2ch), and all ran by a Kenwood Excelon X493. I have all my RCAs ran on the driver side and the power and remote ran on the passenger side. Both amps are mounted on the sub box in the trunk. My problem is, is that I am getting engine noise from the bass RCAs but its coming out of my back speakers not the sub-woofers themselves. Right now I have a ground loop on the RCAs for the bass and that gets rid of the noise. I want to know if there is a way to get rid of it the noise without using it. The power cable is ran from my car's battery which is Duralast gold. It powers both amps using a distributor block and same with the ground going out. Ground is connected to the back seat bolt, where I sanded the paint off to make a good contact. I'll appreciate any suggestions on how to fix it or make it better. If pictures of the set up are needed let me know. Thanks. Quote 2002 Mitsubishi Mirage Duralast Gold Battery (800 Amps) 2 JL Audio 5 1/4s 2 JL Audio 6 1/2s Dual BP1204 Sub-woofer (600w RMS 1100w Peak) Rockford Fosgate Punch 501s 2ch (1500w Peak running at 500w RMS 4ohm bridged) JL Audio e4300 4ch (45w x4 RMS) Kenwood Excelon KDC X-493 Head unit w/ 4.0V preouts Scosche power Wiring and RCAs Monster Audio Cable Link to comment Share on other sites More sharing options...
David78 Posted May 12, 2010 Report Share Posted May 12, 2010 (edited) are your grounds bolted to the seat frame?( im dumb should of read) but when i had my bolted to seat frame i had like a reviving noise from my woofas then i made a good ground in the frame and was all good after. Edited May 12, 2010 by David78 Quote ...............................____ ...............__________|___\____ ..;.;;.:;:;.,;.|__(O)____|____/_(O) 1978 F-150 Ranger Lariat 2 Sets of Sound-stream Components Sony Head-unit DDM Tuning 8000k's Euro Headlights (Projectors Soon) Green Led Wheel Wells Dark Red Tails Tint Link to comment Share on other sites More sharing options...
SgtRodriguez Posted May 12, 2010 Author Report Share Posted May 12, 2010 It's bolted to where the folding seats are bolted to the car. I'll take some pictures and upload them so it's easier to diagnose. Quote 2002 Mitsubishi Mirage Duralast Gold Battery (800 Amps) 2 JL Audio 5 1/4s 2 JL Audio 6 1/2s Dual BP1204 Sub-woofer (600w RMS 1100w Peak) Rockford Fosgate Punch 501s 2ch (1500w Peak running at 500w RMS 4ohm bridged) JL Audio e4300 4ch (45w x4 RMS) Kenwood Excelon KDC X-493 Head unit w/ 4.0V preouts Scosche power Wiring and RCAs Monster Audio Cable Link to comment Share on other sites More sharing options...
n8ball2013 Posted May 12, 2010 Report Share Posted May 12, 2010 try a better grounding point first. Quote THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
David78 Posted May 12, 2010 Report Share Posted May 12, 2010 ^^^ Do it, i dont know the seat isn't a good ground in the first place. (Who Knows) but amps hate when they are grounded to seat frame seat bolts. So try to find a better ground like n8ball said. Quote ...............................____ ...............__________|___\____ ..;.;;.:;:;.,;.|__(O)____|____/_(O) 1978 F-150 Ranger Lariat 2 Sets of Sound-stream Components Sony Head-unit DDM Tuning 8000k's Euro Headlights (Projectors Soon) Green Led Wheel Wells Dark Red Tails Tint Link to comment Share on other sites More sharing options...
97SSBlazer Posted May 12, 2010 Report Share Posted May 12, 2010 Better ground FTW. Quote lower tuning is just hard. I was surprised how loud 145 sounds at 35hz, and how quiet 145 sounds at 50hz. -= 2005 Tahoe LT =-Head unit: Pioneer AVH-X5500BHSSource: iPad Mini in dash Subs: 2 T1 12's Sub Amp: T1500-1bdCPWire: Rockford Fosgate 1/0 awgSignal Cable: MonsterFronts:Stock Bose for now:)Rears: Stock Bose for now:)MIds/High amp: Stock Bose for now:) 2005 Tahoe Build Log: http://www.stevemeadedesigns.com/board/topic/172529-2005-tahoe-my-17th-vehicle/ 2001 Monte Build Log: http://www.stevemeadedesigns.com/board/topic/160030-2001-monte-carlo-my-16th-car-lol/page-2#entry25309381997 Tahoe Build Log: http://www.stevemead...oe-6-15-rf-15s/2001 Impala Build Log: http://www.stevemead...katzkin-inside/ Link to comment Share on other sites More sharing options...
AUDIOTISTICS Posted May 12, 2010 Report Share Posted May 12, 2010 Did you try running a new set of sub rcs cables without installing them. maybe the cable is bad, pinched, screwed into or over stretched. if the noise is still there while you have the new cable ran, ground the outside of the rca to the chassis of the radio. just slide a wire on when you connect the rca to the radio making sure the wire doesn't touch the inside prong. then remove a screw from the chassis off the radio and wrap the wire around it. maybe the radio is not grounding the rca outside ground. Quote More AUDIOTISTICS @ www.audiotistics.com Youtube http://www.youtube.com/AUDIOTISTICS Facebook http://www.Facebook.com/AUDIOTISTICS Instagram http://www.Instagram.com/AUDIOTISTICS Link to comment Share on other sites More sharing options...
SgtRodriguez Posted May 12, 2010 Author Report Share Posted May 12, 2010 (edited) I tried new RCAs and the problem still happens. I have tried some alternate grounds and have had no luck. Here are some pics of the setup. Pardon my messy wiring. http://s902.photobucket.com/albums/ac230/SgtRodriguez/Car%20Audio/ Edited May 12, 2010 by SgtRodriguez Quote 2002 Mitsubishi Mirage Duralast Gold Battery (800 Amps) 2 JL Audio 5 1/4s 2 JL Audio 6 1/2s Dual BP1204 Sub-woofer (600w RMS 1100w Peak) Rockford Fosgate Punch 501s 2ch (1500w Peak running at 500w RMS 4ohm bridged) JL Audio e4300 4ch (45w x4 RMS) Kenwood Excelon KDC X-493 Head unit w/ 4.0V preouts Scosche power Wiring and RCAs Monster Audio Cable Link to comment Share on other sites More sharing options...
SgtRodriguez Posted May 12, 2010 Author Report Share Posted May 12, 2010 Anyone find anything wrong with any of the wiring or anything else in the pics? Quote 2002 Mitsubishi Mirage Duralast Gold Battery (800 Amps) 2 JL Audio 5 1/4s 2 JL Audio 6 1/2s Dual BP1204 Sub-woofer (600w RMS 1100w Peak) Rockford Fosgate Punch 501s 2ch (1500w Peak running at 500w RMS 4ohm bridged) JL Audio e4300 4ch (45w x4 RMS) Kenwood Excelon KDC X-493 Head unit w/ 4.0V preouts Scosche power Wiring and RCAs Monster Audio Cable Link to comment Share on other sites More sharing options...
n8ball2013 Posted May 12, 2010 Report Share Posted May 12, 2010 yes your ground sucks. ground to your frame(is a mirage a unibody?) sand to the bare metal and make sure that it cant move. Quote THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
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