Hi Steve,

That PSU might be suitable.  It's only giving half the voltage that the amplifiers are documented as requiring though.

I've just managed to get the thing working using an old desktop PC ATX PSU, running the amplifiers at 24v rather than 40v.  (I was planning to open a couple up, modify them and run them in series to give the full 40v, but if they work at 24v and I don't have to crack open a safely enclosed PSU and fiddle around with its entrails before plugging it into the mains, I'm happy with that.)

Perhaps it'll work, just give it a go.  (Disclaimer - it's not my fault!)

Idle, the two amplifiers together are drawing 50mA.  As loud as I want it on my desk it was peaking at around 190mA, but that was using a digital multimeter with a slow sample rate and I may have missed something higher.

The audio connector shown on the schematics indicate that it requires a GND connection.  I found that connecting this to the PSU's GND connection (when I was running with batteries and had a +20/gnd/-20v supply) drew so much current that that the multimeter couldn't read it and the batteries got quite warm.  It works quite OK just pumping the audio in without a GND connection.

If I can work out how to, I'll upload annotated images of the connectors.

Mark.

OK then - the audio connector.

As I mentioned, I've NOT connected the Audio GND to the PSU GND.  It pulls too much current and it doesn't appear to be necessary.

The connector has two sets of four wires, one for each amplifier;

• Green - Audio GND
• Brown - Audio In
• Black - Audio GND
• White - NOT Mute - must be high (+ve) to enable the amplifier output.

On the photo I've got a couple of yellows and a black carrying Audio L, Audio R and Audio GND.

Power connector.

Four lines, two for each amplifier.

The outer wires of the bunch of four have a white stripe on them.  These are the PSU's 0v.  The central solid-black two go to the PSU's +ve connector.

Anyone wishing to use an ATX PSU for this, here's the pinout of the connectors...

http://pinouts.ru/Power/atxpower_pinout.shtml

I'm running mine off the +12v and -12v connectors.  Note that you have to connect pin 14 to one of the GND outputs of the PSU to turn it on.

Oh, and DO NOT rely on the colour coding!  Use the pin positions and then cross check with a volt-meter to ensure you're connecting to the right ones.

I hope that this has been of use and will bring many hours of auditory pleasure to anyone wanting to have a go.

Its amazing, this is exactly the project I'm putting together

Did you have any luck with this project.

I recently ressurrected a the speaker and the amps from a Beovision Avant 32' CRT VCR.  I'm wanting to use them to attachedto a CD player.

THerefore need to attach power and work out how to attache the CD. 

THe CD player only has RCA plugs that I would have to make some inputs into the amps for.

If you have procedures and photos, that would be great

d

The project got to the point where with mine is shown above.  I've used a PC PSU -12v/GND/+12v to provide the power but that's a little naughty and I really need to source a decent PSU as the -12v on the PSU isn't really supposed to have much current drawn on it.

The bits are now on the shelf, along with many other uncompleted projects, but the photos and annotations above should be a good point where you can put power and audio L/R in and get a chunky sound out.  Thank you for the prod though.  I really had ought to get on with this and finish it off.

After years of earing me saying how fantastic my B & O tv was, my best friend bought a used grey Avant 32 VCR (from my B & O store).

He really enjoyed it for years and years but a few months ago my best friend kids (or young mens) started to talk about how a 4k tv would be great with the GoPro shootings, blablabla...

While I was at his place not so long ago we talked about tv's and we had a look on the internet for the sales.

My best friend wanted to spend the minimum and we found a Polaroid 4k 55" for 600 €.

He bought the tv and needed a furniture to put it on but that was too much money.

So he got the idea of hang it on the Beovision Avant that he had dismantled and use the speakers.

I can't tell you how he did it but after a few weldings and spending a little more than 4 € on a electrical part the tv is fonctionnal (he gets the sound of of the Avant speakers while watching the Polaroid tv).

The only thing not working yet is the motorised stand but he thinks he's going to make it work.

Voilà.

I don't have better pics and my friend is in Spain right now. Cannot ask any question.

Check this thread: /forum/general-discussion-and-questions/keep-only-avant-speakers-and-surround-module-diy-heavy-mod#post-1969633