Dissortion

[Martyn330Ci]

Hey guys, just connected my Hifonics amps on Alpine IVA D-105 with Audison signal cables which leads through middle of the car, but the sound is pretty dissorted:( any ideas what can be problem with? Power supply cables leads in different way than signals..

[paraklas]

whatever you do, don't run ANY signal cables from the battery side of the car even if after they run through the middle.

Had the same problem and I run all my cables from the left side of the car then middle and sound is crystal clear

[Martyn330Ci]

whatever you do, don't run ANY signal cables from the battery side of the car even if after they run through the middle.

Had the same problem and I run all my cables from the left side of the car then middle and sound is crystal clear
Thanks for post, but there is no electricity in left side of the car? I´ve thought that in the middle is best place for signals - isn´t it? I know that in right side is all of electricy lead, and thought that in left will be something too..
Oki so you recommend lead cables via left side, i´ll give it a try, but i´ve heard that at BMW´s is distortion to amps inducated via power supply cables - that the amps are badly grounded - do you think it is possible? I´ve grounded amps directly on a battery..

[paraklas]

What I mean:

Put the electronics and wires on the left side of the trunk NOT on the right which is the battery.
Run the cables:
From left part of trunk, through the hole behind left rear seatbelt then under the rear seat, avoid the fuel pump wires, then run them through the middle of the car.

Ground is critical. The shorter the better and put it on bare metal. Common ground between devices helps too as it prevents ground loops.

[ca1242]

You can certainly run the cables down the middle.
What kind of distortion do you have? is it a ticking noise, or whine that goes up and down with car RPMs? Does the noise go away when the car is not running? Does the noise stay when the stereo is off? Are amplifier gains adjusted properly?

[grnbmr808]

try grounding amps to stock grounding location located above left rear wheel well. this may make it go away. if not answer the questions ca1242 asked.

[dkangman]

I have hifonics, audiocontrol matrix, and 3sixty2.
At the beginning I only had the amp with min level.
There was no hissing (well, did not noticed any).
After installing te matrix and 3sixty2, I am starting to have this hissing sound.
The only way I can make it go away, is by lowerig the level from the 3sixty2. The problem is that it will not increase the volume as high as I will like from the HU. Sound quality has improved a lot, but not good enough. I mean, it is ok when the volume is moderate but not when it gets kind of high.
People have told me that it is the stock HU that produces the hissing sound and the low sound quality. I still have the HK speakers, except for the from 6.25" speakers.
Can anybody give me some hints so I can fix the problem?

[ca1242]

Talk about taking over a thread.

You are mixing crappy equipment (oem speakers) and high-end equipment and except audiophile-grade results? I would look at getting nice speakers first.

Are you using aftermarket amps for speakers and subs, or retaining any of the oem amps?

I wouldn't consider the OEM head unit audiophile-grade equipment, but is a better than average quality component and provides a clean signal (older E46 head units do have a little more distortion when all the way up than newer units though)

Not sure what the need for line driver and eq are with a stock system, but I would definitely upgrade to nice amps and speakers.

As far as the line driver, set it up for max output with no distortion, move down the line.

If your only concern is hissing, then you need to figure out which component is causing it. Get a cd with a "silence" track and try to figure it out. Remove one component at a time, if necessary.

With a high-end system, good components are only 1/3 of the equation. Proper installation and tuning are the other 2/3s.

[grnbmr808]

Talk about taking over a thread.

With a high-end system, good components are only 1/3 of the equation. Proper installation and tuning are the other 2/3s.

:werd:


upgrade all your components if you want best results.