I've got a turbo and when i give her hell i get distortion through the speakers.... why's that and how can i fix it. Also with my sub, its in the boot and is too quiet.... what can i do to get the sound through. Its a 10" 2002 pioneer

yeah a mate of mine, his VL has a whine in the rear speakers that gets progressively more high-pitched the more revs the engine is doing some kind of electrical interference from the engine i guess but how exactly do u get rid of stuff like that (says me who knows little bout stereos)

I heard that if the power are running with the RCA's from the head unit to the amp you get the engine noise from the power crossing over to the RCA therefor you get the engine noise cumming through the speakers. So maybe if yo change that arround it might work. if so can you let me know? cheers, Steve

I heard that if the power are running with the RCA's from the head unit to the amp you get the engine noise from the power crossing over to the RCA therefor you get the engine noise cumming through the speakers. So maybe if yo change that arround it might work. if so can you let me know? With getting more sound out out of ur sub you could try turning up the gain on the amp, if not a bigger box cheers, Steve

Whats is most likely happening is your car is an older car and the wiring harness isn't the best so you're gettin electrical interferance. What you could try is keeping the power wire on one side of the car, and then speaker cable + RCA's run down the other. If that does nothing, try getting a Noise Isolator from JB HiFi or someone like that... i know Aerpro make one... Try these part numbers from Aerpro AP302 - 10-15 Amp Noise Filter AP300 - 5 Amp Noise Filter AP306 - Ground Loop Isolator They should be all you need to fix it if moving the power wire doesn't help.

Yeah, thanks guys. I am running my power wire next to my RCAs and speaker wire. When i get a chance i will rip it out and run it somewhere else. Only thing is.... I am running my four speakers from the heady and i also get distortion from the fronts. they are nowhere near the powercable running to the amp in the boot. Also any information on the sub problem?

A mate only has a 10inch sub in his boot but has cut some ports through the back shelf to let it through, is this worth doing or is there a simpler way.

You are getting noise interfearence or an earth leak somewhere. Run your RCA cables on opposite side of car to all power cables, keep power cables together and speaker cables seperate. Make sure your amp is well earthed as well as your headunit. Check along your RCA make sure it isnt split anywhere and rubbing on your body anywhere (allowing an earth leak). If any of this doesnt work than get a noise filter either a power one or an RCA one. Both should work, i recommend using the inline RCA one....

Could also be interference coming through the actual head unit itself. If you are using the existing ground cable in the wiring loom, u could try running a new ground wire from the head unit to another suitable earthing point

Yeah Most people here are right, power cables should be separated from RCA's and speaker wire. Your head unit and amp should definately be grounded to directly to the chassis. The amp ground wire needs to be between 30-100cm long. Make sure you use nice, thick power cable to your amp, otherwise it may start clipping, causing unclean, low power levels going to your sub (can cause damage to sub). Also, get your alternator checked, it may be on its way out. BTW, noise filters hardly ever work, maybe 5 times out of 100. Get your wiring right, and you'll have no probs. Good luck dude. -Ben

i put 2 4" ports straight through the parcel shelf into the boot (and made a custome parcel shelf while i was at it) and bolted down the sub box... and it thumps. the day after i did this, my mates thought i had bought a stronger amp... bolting the subbs down really makes a difference... and give some protection against snatch n runs :twisted:

Quote: Originally Posted by BurgundyCalais The amp ground wire needs to be between 30-100cm long. What!?? Nonsense, the shorter the better is the best solution for your amp ground cable. Just make sure the cable is of decent size (same size as power cable run) Quote: Originally Posted by BurgundyCalais BTW, noise filters hardly ever work, maybe 5 times out of 100. Gee dunno what experience you have had with filters but it sounds bad :s Every install i have done that has needed a noise filter (problem could not be found usually due to ****arse headunit) i havent had any problem with the RCA filters i use.