2 Beograms connect to Beosound 9000

[kktsui]

Hello all,  If any adaptor or cable to connect 2 beograms to Beosound 9000 at the same time so that I can use either one? I have Beogram 4500 and Beogram RX2 with pre-amp, both turntables are using Din 5 plug connect to Beosound 9000. Thank you for your help in advance.

Best Regards,

Peter

[Guy]

B&O used to make an aux expander with full 7-pin DIN inputs/outputs as shown below:

I don’t know of any other 5/7 pin switching units.

The alternative is to use DIN to phono adaptors, and then get a switching box like this: https://www.amazon.co.uk/Way-Cd-Aux-Stereo-Switch-Black/dp/B000KVODHA/?th=1

I think Sounds Heavenly used to supply such a box but I can’t find it on Steve’s site – he can probably help with leads.

[Guy]

A more expensive remote controllable solution here:  https://uk.bosscom.com/products/details?id=1143

[kktsui]

Hi, I can find a 7 PIN AUX SPLITTER – DUAL AUX / TAPE INPUT SOCKETS from Sounds Heavenly.  Is it the right adaptor in my case?  Howver, unfortunately, he will not send to my place right now.  Thanks.

[Guy]

kktsui wrote:

Hi, I can find a 7 PIN AUX SPLITTER – DUAL AUX / TAPE INPUT SOCKETS from Sounds Heavenly.  Is it the right adaptor in my case?  Howver, unfortunately, he will not send to my place right now.  Thanks.

I think that you will experience problems with this adaptor if you leave both turntables connected at the same time – the input impedance will be wrong and the sound level reduced.

You will need to use a switched solution.

[kktsui]

Hi, thanks for your reminder.  I think I need to find a switch box with 7 pin input instead.

[Guy]

kktsui wrote:

Hi, thanks for your reminder.  I think I need to find a switch box with 7 pin input instead.

You won’t need 7 pin. Pins 6 and 7 are only for datalink which the BS9000 does not have. You should be able to unscrew pins 6 and 7 from the DIN plugs with a small screwdriver, and then use a 5-pin switching unit – if you can find one.

EDIT:  And if you do remove the pins keep them somewhere very safe for future use (or future BeoGram users!)

[kktsui]

Thank you so much for your advice!

[Guy]

No problem – happy to help!

A further thought – a while back I found this switch box which is designed for a different purpose:  https://www.tvcables.co.uk/2-port-svga-5-pin-din-switch-box-sb-392.html

Anyway, I just searched eBay, found one cheap and purchased it.  I plan to use it for a different project, but when it arrives I will check the internal switching and connections and see if it could be used as an aux switcher.  I will post back here when I know more.

[kktsui]

Thank you so much for your effort!!!

[Guy]

So the switch box arrived today.

Although I bought ‘opened never used’ from eBay, here’s a reminder of the type from one of many suppliers:  https://www.tvcables.co.uk/2-port-svga-5-pin-din-switch-box-sb-392.html

I opened it up to check the wiring and it appears to be fully switching between all 5 pins of the din inputs (plus of course the added ‘bonus’ of the 15-pin VGA sockets).  I think the main rotary switch would be described as at least 20-pole two-way, but I may well have the terminology wrong!

Anyway, I did a quick check with a couple of iPhones and it works well to switch between two-5 pin DIN inputs to a single 5-pin DIN output.  It comes in a nice metal case with rubber feet.

Here are some photos:

I did check for ‘crosstalk’ between the two inputs but couldn’t detect anything.  I am not sure that I would use it for non-RIAA/pre-amplified turntables due to lack of screened cables, but as a line-level audio switching box I would expect it to be fine – hence perfect for connecting two turntables to the BS9000 as asked in the thread.  You would just have to remove pins 6 and 7 from the Beogram DIN plugs, and then use a 5-pin DIN to DIN for the output/input to BS9000.

It would also be quite easy to replace the 5-pin sockets with 7-pin for datalink (or 8-pin for Powerlink) and move some of the cables from the VGA sockets.

Happy to answer any further questions!

[kktsui]

Hi, Much appreciate for your detailed information and pictures. I will consider to take your advice to solve my issue. Many thanks! ?

[Steve at Sounds Heavenly]

Hi Guy,

Looks like a very interesting and well made project, thanks for sharing this!

Kind regards, Steve.

[Author]

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