Quote:
Originally Posted by nearwater4me
Quote:
Originally Posted by Poochie
I can personally guarantee you that when system senses an open circuit, such as disconnected center speaker, it disables ASD and the bass.
I literally copy and pasted this fact from NewTIS and I actually tested the theory last summer when I was replacing my under seat speaker.
An open circuit also leaves a bunch or shadow error code with the ISTA+ diagnose program, indicting a said speaker or ASD is disconnected, preventing any repairs that requires a I-step software revision.
You can believe whatever works for you but if you speaking in facts, any open connection within any module or speaker generates a fault.
Here is a list of errors you'll encounter after you disconnect the center speaker or ASD:
[COLOR="DarkRed"]B7F821[/COLOR] - Speaker output leads, front left disconnection, open circuit
[COLOR="DarkRed"]B7F825[/COLOR] - Speaker output leads, front right disconnection, open circuit
[COLOR="DarkRed"]B7F829[/COLOR] - Speaker output leads, rear left disconnection, open circuit
[COLOR="DarkRed"]B7F82D[/COLOR] - Speaker output leads, rear right disconnection, open circuit
https://f30.bimmerpost.com/forums/sh...php?p=19426470
https://www.2addicts.com/forums/show....php?t=1260271
https://www.2addicts.com/forums/showpost.php?p=19904131 |
I wasn't arguing the information you provided was false, but was merely stating that ASD and bass reproduction is working fine in my M2C even with the center speaker disconnected.
Could it be possible that this fault code sensing/ASD canceling isn't initiated 100% and is checked periodically?
If so, this may explain why my amp drops the bass (underseat subs) intermittently.
In fact, it happened this afternoon.
Just the passenger's side sub was not playing (I have the trunk sub hooked up to the passenger's side sub, so I know when it's out)
One thing for sure is that ASD is working fine.
The speakers play a deeper bass tone when I hit the sport button during cold start. (The exhaust note does not change) |
I can't decipher your specific issue unless I'm actually there to diagnose what's going on but I will say that from my own personal experience and factually from the proof I provided that if any and all error is detected within the stock audio BUS connect, the HK system and ASD goes into a "fail-safe" mode.
You will still have audio from the remaining speakers but it will never perform as it was design to operate and sounds very flat, with no bass. That's a fact.
If you are using an aftermarket system, this issue I've described might not be as prevalent, since your aftermarket system is just boosting the thin audio signal from the partly functioning unit, masking the fault.