BeoLab 8000: how does AutoStart work with Cinch audio-IN ?

8 replies

In my DIY project I am connecting my own wireless audio signal directly to the AMP-board inside the BeoLab 8000. To do that I am using the P4 connector on the Amp PCB.

The P4 connector is normally connected via a 3-pin JST PH2.0 cable that goes to the bottom of the speaker unit. Here it connects onto a small PCB in the top of the foot. This connector and cable (see picture) has three wires: black, white and brown. White is audio signal IN, black is ground and brown is for AutoStart.

I understood that AutoStart is a kind of function that causes the speaker to switch from standby to on, when an audio signal is detected. I want to keep this AutoStart function working after I connected my own wireless Audio-IN.

But ... when I connect my wireless input, the Brown wire is disconnected. I think that will cause that I loose my AutoStart function.

Question:

  1. How can I keep the AutoStart function?
  2. What exactly does the brown wire do? And to what is it connected? 

 

Location: The Netherlands

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Beolab-18.png Beolab-18.png

Can you explain better what is your wireless audio?

Are you able to create a 5V signal when you switch your wireless audio device?

Can't you just use the original RCA input?

Martin

My wireless audio is a pcb with audio streaming functionality. I will build it inside the BeoLab 8000.

For powering it, a small ac/dc converter will be added.

I do not want to use the cinch on the outside, because I want a completely wireless BeoLab (except for the power cable).

 

But I als want the Autostart function with automatic switching of the standby. That’s why I think the brown wire is importatnt.

Does this explain well enough?

Location: The Netherlands

My B&O Icons:

Beoremote-Beo4.png Beoremote-Beo4.png
Beovox.png Beovox.png
Beosound.png Beosound.png
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Beolab-18.png Beolab-18.png

Yes, fit the wireless receiver inside the Beolab, run the output from the receiver to the speakers RCA input.
You can solder it directly to the RCA solder joints inside the speaker. Nothing visible on the outside.

Martin

I am not sure if I got it right from your suggestion. Here's what I mean with connections.

The Audio-OUT of my wireless receiver, will be connected with the P4 connector on the amplifier PCB of the BeoLab. So not soldered, but connected via a JST PH2.0 connector.
This means, I will disconnect the existing wiring from P4. This is the Black/White/Brown cable that normally connects the cinch plug on the outside in the foot, with the P4 Audio-IN connector on the amplifier board.

To do this, is not a problem. I have done that already, and it works.
But the issue is that by unplugging the Black/ White/Brown cable, there is no connection anymore with the Brown wire. I think this is the wire that triggers Autostart (switching standby on/off).

So I try to understand how the Brown wire s connected to the system, and how it works. So I can find a way to keep the Autostart functioning.

Location: The Netherlands

My B&O Icons:

Beoremote-Beo4.png Beoremote-Beo4.png
Beovox.png Beovox.png
Beosound.png Beosound.png
Beosound-9000.png Beosound-9000.png
Beolab-18.png Beolab-18.png

I mean, why break any circuits inside the speaker, when you can connect your audio out to the RCA input (albeit from the inside of the speaker)?
The auto-start circuit will then be intact.

Martin

If I use the RCA input on the outside, my additional electronics are also outside.
Again, my intention is to make the speaker wireless for audio input. So that also means that additions should be invisible.

Thanks for thniking with me Martin! 

Location: The Netherlands

My B&O Icons:

Beoremote-Beo4.png Beoremote-Beo4.png
Beovox.png Beovox.png
Beosound.png Beosound.png
Beosound-9000.png Beosound-9000.png
Beolab-18.png Beolab-18.png
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