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Old 02-24-2010, 09:19 PM   #50
fotoflojoe
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Join Date: Jan 2007
Location: Mass
Posts: 91
My Ride: 2006 M3
Quote:
Originally Posted by jeffb325 View Post
I wonder if the fix that dynavin has come up with might lower the output of the unit (and the noise floor along with it) to a level more compatible with the bmw amp.....the simple fact that they said they were using speakers for testing and not an actual bmw car....or at least the amp and speaker from a car....makes me think that they didnt properly account for the e46 amp.

I have done installs before on oem "amplified" systems (older fords in particular) that I didnt know were amplified until I turned everything on and got symptoms very much like the dynavin problems. Hiss, clicks, hums, bleed, all kinds of problems. Installed a line output converter in line and the problems go away. This is common everyday practice for a stereo installer....matching input and output levels of different components so everything plays nice together.

Or maybe its nothing related to this at all and they just got a few components wrong on the board

And while it sucks that they got it wrong the first time, at least it looks like they are quickly trying to get everything right...
Looks like your initial assessment was spot-on!

Couple questions:

Is it fair to say that the hiss/hum/bleed will only come through the unit's balanced outputs? That is, would the line-level outputs not be affected by this interference?

And, if the line-level outputs would be affected, is there a technique or device that can be used to lower gain of the signal coming from the line-outs? A LOC's counterpart, if you will...

Sorry if the questions don't make sense, I know just enough about car audio to get myself into trouble.

I have an old A/D/S amp that I'm considering installing along with the Dynavin. The amp has plenty of power for front and rear component speakers and a sub. I'd like to get it into the car, but if noise will be an issue at line level, maybe I'll hold off.

My unit's still sitting in the box on my desk - waiting on an HVAC relocation bracket.

Thanks!
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