Behringer DCX2496 digital X-over

I have a problem with mine, it loosing the sound while switch on and of other equipment in my apartment. For example; Turning of the roof lights and the unit mutes for 2 sec.

I have replaced the 110 ohm r with a 83 Ohm while doing a direct spdif mod. But this would in my apinion only do good?

Any solutions?
 
I used to have that problem with a long SPDIF cable (about 8 meters). It turned out to be a grounding problem. Ceiling lights and sometime even the air conditioner at the other end of the house would cause the problem when turned on or off. Once I had installed a better ground in the listening room, the problem went away.

You may want to look at grounding problems in your house electrical system.
 
Good info

Peter,
Good info, thank you.

Pano,
I had a grounding issue (hum, rather than dropouts) with long SPDIF/AES cable from SRC2496 to DCX.

Solved with tiny pulse transformer pulled from an old network card.

It even fits in the XLR plug 🙂

Hope this is useful to someone,
AP
 

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Twisted Pear Toslink input installed

The twisted pear solutions works very well and is easy to build / instal.

Stole the +5V / GND directly from the output pins of the power supply.

I have not changed the resistor value at the input transformer. What advantage would this bring?
 

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The Murata and maybe the cs2501 appear to be 6pin devices.

Are the middle pins for a centre tap?

Do all pulse transformers come in 6pin format?

Hi Andrew,

Sy's link shows 4/6 pin, but not CT.

IIRC I never found a cs2501 datasheet, only for similar parts (some CT).

It seemed logical that NICs would use them (imagine office building ground loopiness otherwise); and if OK for 10mb/s ethernet, SPDIF should be a cinch. So I went rummaging, and found something that measured equal R from centre to side pins, open circuit from one edge to the other, and looked rather like the 4-pin one in my tube Dac ("pulse transformer" on Sheldon Stokes' BOM).

In it went. I was delighted when it worked!

Best,
AP

PS, My first and only use of 'looks like' for component selection, honest 😉
 
Cool! I also used a pulse transformer and it worked well (IIRC) until I tripped over the cable and pulled the poor transformer apart! 🙁

Sending the SPDIF signal over a balanced line is a good idea, if much distance in involved.