Hey everyone
I've got a few digital sources hooked up to my system and I'm frequently comparing DACs. I'm looking for a better way to switch between them. Right now, I'm using a cheap external switch box, but it's not ideal and adds another cable going to the DAC.
What I'd really like is a professionally made switch built right into my DAC's case, so I don't need any extra cables. What's the best approach for switching coaxial and S/PDIF inputs?
I'm thinking a basic rotary switch probably isn't the right way to go, am I right?
I've got a few digital sources hooked up to my system and I'm frequently comparing DACs. I'm looking for a better way to switch between them. Right now, I'm using a cheap external switch box, but it's not ideal and adds another cable going to the DAC.
What I'd really like is a professionally made switch built right into my DAC's case, so I don't need any extra cables. What's the best approach for switching coaxial and S/PDIF inputs?
I'm thinking a basic rotary switch probably isn't the right way to go, am I right?
I would just use a plain old rotary switch, probably with gold plated contacts to be sure it won't oxidize, and use 75 ohm lines for the connections to and from the switch. The switch itself is bound to be electrically very small at the frequencies used for S/PDIF, so I don't see any reason to use a fancy RF switch.
Try MAX452-MAX455, still avaliable on aliexpress, and use rotary switch to set the chip input. Unfortunately it needs symmetrical +/-5V supply, but if you have SPDiF with TTL levels (BT receiver etc.), it works properely with single +5V supply.
My s/pdif switch project Whazon may serve your use well. It is an 8-input selector, 4 coaxial and 4 Toslink, up to 24bit/192K, one coaxial and one optical output, has a display, remote controlled with a smartphone, takes power from a phone charger via a micro-USB jack, has I2S interconnection to work with a DAC board.
The project page is Here, go to post #13 for the project release summary.
The project page is Here, go to post #13 for the project release summary.