EONON Amp vs BMW HI-Fi Amp (bypass?)

[Crowz]

Originally Posted by wpoll

Yep - exactly what I said (about line level outputs)

I'm going to need to study the wiring diagrams a little closely - this still makes no sense. In a NAV setup, the trunk mounted BM54 radio/amp is just that - a radio/amp. There is no second amp. So when you say "factory radio" what are referring to?

No the bm54 is the RADIO not the amp. The amp is in the cubby hole. When I put my seciane in I removed the bm54 since it wasn't needed but the amp is still in the cubby hole and is what powers the speakers.

[tmaxx445]

Originally Posted by wpoll

Yep - exactly what I said (about line level outputs)

I'm going to need to study the wiring diagrams a little closely - this still makes no sense. In a NAV setup, the trunk mounted BM54 radio/amp is just that - a radio/amp. There is no second amp. So when you say "factory radio" what are referring to?

There is still a separate amplifier on all our cars here. The BM54 just functions as a radio tuner and "audio gateway of sorts"

[upallnight]

Originally Posted by tmaxx445

Those are the line level outputs hanging loose, the factory installed amplifier gets speaker level input from both the original factory radio as well as the new aftermarket unit through the factory square plug seen in the pics.

Except the installer used the factory output speaker wires from the aftermarket amp instead of the line level output which as you can see are hanging loose. Sounds like you are overdriving the factory amp with the Eonon unit. Get the adapter that allows you to goes from RCA female connector on the Eonon to pigtail connectors and use those pigtails to wire into the connector that you bought to connect to the factory harness.

[crystalworks]

Originally Posted by upallnight

Except the installer used the factory output speaker wires from the aftermarket amp instead of the line level output which as you can see are hanging loose. Sounds like you are overdriving the factory amp with the Eonon unit. Get the adapter that allows you to goes from RCA female connector on the Eonon to pigtail connectors and use those pigtails to wire into the connector that you bought to connect to the factory harness.

That would be an interesting experiment. But shouldn't be necessary with his current system. Unless there is a dramatic difference in the output levels of these android head units. I haven't ever heard of anyone having to use the low level outputs of one of these units to feed signal to the speaker level inputs on the OE amplifier. I certainly didn't have to.

Crowz is right... could be the Eonon itself acting up. Though looking at those pictures really makes me question the skill (pride of work) of the installer.

[semcoinc]

I experience phenomenal sound from my early Eonon GA6166 in my factory Nav, non-DSP Hi Fi system.

Here are my volume settings which work out just fine for me:



I simply used the long Fakra harness cable from the head unit to the FM tuner cable under the spare tire, aft of the battery.

E53s with non-factory Nav make the same connection to the factory harness up front and do not have to drag and bury that long a$$ cable all the way to the rear.

My hypothesis for the OP is that something else is wrong, perhaps in the head unit, especially if the tech connected the HU to the factory harness properly.



Mike

[xskizzx]

Thanks for the settings I will try the this morning.

Is the factory amp able to retain the EQ settings offline? If so I'm wondering if my volume or modications when I first got the car were never cleared and it's double EQ/Volume boosting? I read somewhere on the E46 forums about someone that reinstalled the MDI and turned turned down the volume and then reinstalled their Eonon or Seicane... But I wish I had read about the DACs on the Dynavin.. That would have totally changed my decision although I don't like that it's a locked system.

[Crowz]

This is looking in the compartment with the drivers side cubby door open.

[Crowz]

This shot shows the sticker. I never could get the camera turned well enough to read it in a pic.

It has "BMW Amp" on the sticker but I couldn't see the model number.

[Crowz]

That's also why you need the loom going to the rear on the nav cars. The signal that feeds the amp on nav cars comes out of the bm54 and goes to the amp so there are no speaker wires (source wires) going to the front of the car.

When you have a non nav aka business cd it has a set of wires going from the amp to the front of the car already because the radio is the in dash not in the back like it is on a nav equipped car.

[wpoll]

Originally Posted by Crowz

That's also why you need the loom going to the rear on the nav cars. The signal that feeds the amp on nav cars comes out of the bm54 and goes to the amp so there are no speaker wires (source wires) going to the front of the car.

When you have a non nav aka business cd it has a set of wires going from the amp to the front of the car already because the radio is the in dash not in the back like it is on a nav equipped car.

Yeah, I get that (I do this sort of thing for a living!) but I still can't believe that the factory setup (in some cases) has two power amps in series.. no wonder it sounds like crap!