Phoenix Gold Phorum

I have a TLD 66 installed by the head unit.

When I turn up the Linedriver gains I get a buzzing/whining noise which you can head at low to medium music volumes.

Its annoying to say the least. Now here is the thing. I only get this noise when the car is on. When it is off and I am listening to music it is crystal clear.

So what would be my problem here? Also, what voltage does the TLD66 clip at?

where are your audio components (head unit, tld, etc) grounded at?

the tld has a max output of 13volts iirc correctly...what voltage do you have it set at?

That's because yer getting engine noise from the alternator. How do ya have it grounded? Try grounding the HU and the TLD at the same point and make sure you don't have yer RCA's crossing yer power wire cuz that'll also create noise.

Bfowler wrote:where are your audio components (head unit, tld, etc) grounded at?

the tld has a max output of 13volts iirc correctly...what voltage do you have it set at?

Head unit is grounded to the stock ground wire. TLD, I don't know. I had a shop install the amps and such. I don't see any wires going to the battery that could have come from the TLD. Just my 0 gauge for the amps.

I have it set at 8 volts

Get yourself a DD5 or DD10 and have it power / ground your system.

I have my whole system except the amps powered / grounded through my DD5 and I have no noise what so ever.

use some 12 awg speaker wire and ground the tld AND the headunit to the same place as your amps

you can run it over the carpet/outside the car just to see if it helps

oh, and 8volts MAX? 8 volts at 3/4 volume?

Bfowler wrote:oh, and 8volts MAX? 8 volts at 3/4 volume?

I set all my gains at 45/62 volume and never go past that while listening...unless it is a song with low recorded volume.

Im just paranoid of clipping my amps becuase I can't tell a clipped signal.

if its 8 volts at that volume, you are probibly ok...

im guessing the problem lies in grounding. you said your amps are grounded back to the battery?

Bfowler wrote:use some 12 awg speaker wire and ground the tld AND the headunit to the same place as your amps

you can run it over the carpet/outside the car just to see if it helps

What does the 12 awg speaker wire have to do with it? Does having a 16 awg speaker wire also cause whining? I have the same problem, but I figure it's my ground (haven't had a chance to change it yet). I am running 16g speaker wire from the back (amps) to the front (speakers) @ 100w rms (about to be 200 soon), so I'm worried if this affects the whining as well.

12 is just to be on the safe size since its probably a longer run from the head unit/tld to ground. 16 would could very well work also, give it a try!

i can almost promise you, 16awg speaker wire is NOT related to the problem at all.

maka78 wrote:

Bfowler wrote:use some 12 awg speaker wire and ground the tld AND the headunit to the same place as your amps

you can run it over the carpet/outside the car just to see if it helps

What does the 12 awg speaker wire have to do with it? Does having a 16 awg speaker wire also cause whining? I have the same problem, but I figure it's my ground (haven't had a chance to change it yet). I am running 16g speaker wire from the back (amps) to the front (speakers) @ 100w rms (about to be 200 soon), so I'm worried if this affects the whining as well.

Brian is talking about using speaker wire to ground the TLD66. He's not talking about too low of a gauge of speaker wire causing whine.

No, my amps are grounded to part of the frame in the trunk

Capital_M wrote:No, my amps are grounded to part of the frame in the trunk

ok, so take some speaker wire (i pair of wires)....use one length to ground the head unit to your amp's location, and the other length to ground the tld to the same spot.

you can run it over the carpet to see if it works. let us know the results

Brian is trying to set you to a single point ground for all your (HU, TLD, amps and any other active device in the signal path. That's why he says do it temporarily to see of the problem is eliminated.

A car frame/body has resistance. Using direct battery B+ for your gear but using a local frame ground for your B- could create a potential difference in voltage across the frame's resistance. This difference sometimes causes noise in the audio system. Like running a Porsche on pump gas, per se.

By deploying a single point ground (using the same location to ground ALL your gear), you'll have less chance of power induced noise as all devices are drawing from exactly the same ground.

When you run a 4ga or 0ga from your battery to your distro block in the back, run another from the battery B- terminal to another distro block. Distribute your ground like you would distribute your B+. Only fuse the B+ runs, but bring them BOTH home.

HH

I will try it out as soon as I get some time.

Also i sold my subs, never liked them. Looking to try something new.

Im thinking of adding another x600.1 (2 in total) to my system and for subs running 4 RSD10 sealed.

I have everything wired to the battery , amps , sld-44 , basscube and head unit oh and my eclipse ipod module . No problems with noise what so ever

couple things:

1) I had engine whine pretty bad... But learned that it was famous with some/certian pioneer decks.. MY RESOLVE was to ground the RCA's from the HU. I wrapped a small 16/18ga wire around the outside (neg) lead from one of the RCA's from HU and grounded back to the headunit... BLAM -> GONE
Maybe that would help.. not sure depends on type of HU perhaps.
They do make RCA's with Ground leads for just that.. but you can do it as i instructed as well

2) Am I understanding that it is best to ground the Sound Gear (i.e. Amps, Cap, BASSCubes, etc... ) directly to Battery, or only if there is noise/whine issues?? If no whine/noise issues, is there anything else taht could be gained by running ground directly to battery>???

2)...not particularly...

okay thank god.. wasn't looking forward to running another 18' of 0ga from the battery back.. geese... I had noises when I had a line driver too.. but I removed the line driver as I probably didnt even need it with the MS series gear, and grounded the RCA's , blamo no noise.

I mean that's true right?? MS Series gear dont really need/like to have line drivers on them??

Booya!

http://phoenixphorum.com/trouble-shooti ... vt178.html

mhyde71 wrote:couple things:

1) I had engine whine pretty bad... But learned that it was famous with some/certian pioneer decks.. MY RESOLVE was to ground the RCA's from the HU. I wrapped a small 16/18ga wire around the outside (neg) lead from one of the RCA's from HU and grounded back to the headunit... BLAM -> GONE
Maybe that would help.. not sure depends on type of HU perhaps.
They do make RCA's with Ground leads for just that.. but you can do it as i instructed as well

2) Am I understanding that it is best to ground the Sound Gear (i.e. Amps, Cap, BASSCubes, etc... ) directly to Battery, or only if there is noise/whine issues?? If no whine/noise issues, is there anything else taht could be gained by running ground directly to battery>???

Matt ,

There were a few reasons behing me grounding everything direct.
I too had a Pioeer head unit at the time and I started getting alot of noise. I did everything that is listed under the troubleshooting amp noise tutorial and still i was having problems. So I ran o gauge from my battery and then to my 5 farad capacitor bank that acts as a distro block for my amp and Basscube. everything else else that is up front , The deck , ipod mod,linedriver has there own seperate wiring from the battery to there respected places.

I have a old van (1988) and I guess a little water was being let in a place that wasnt easy to get to. Long story short and ripping out all the carpet I found the place and sealed it and that could of been the problem. I used to run a ground around the passengers seat.

Now for the HU I ddint want nothing interferring with its powwr or ground to emit noise so i did what all the cool kids did and now I feed the HU with my battery instead of using the factory alotted wiring that also shares power with other things.

mhyde71 wrote:I wrapped a small 16/18ga wire around the outside (neg) lead from one of the RCA's from HU and grounded back to the headunit... BLAM -> GONE

Your amp's RCA was drawing ground from the amp chassis, which, I assume, is grounded to the vehicle frame near the amp.

Your HU chassis was drawing ground from a different location.

This potential difference (noise) was feeding back though your amplifier to your speakers where you could hear it.

You eliminated this potential difference by providing a single point ground between signal ground (the RCA) on the amp and the HU chassis.

Problem was solved. The more devices in your system, the more possibility for grounding issues. Bring all the grounds home.

But what explains the fact that it only happes when the car is on...And if i turn the line driver gains down it will go away