• Disclaimer: This Vendor's Forum is a paid-for commercial area. Unlike the rest of diyAudio, the Vendor has complete control of what may or may not be posted in this forum. If you wish to discuss technical matters outside the bounds of what is permitted by the Vendor, please use the non-commercial areas of diyAudio to do so.

Twisted Pear 4:1 Mux Demux Switch

I'm having problems with a TW 4:1 mux /demux switch and hope someone can help! I'm using the switch to switch between Optical, SPDIF and AES.

Everything works perfectly until I connect the AES input. Then the output from the AES input comes out whatever source position is selected and any other source does not come out.

I'm using an impedance /voltage converter circuit for the AES input but I get the same problem when using a Canare conversion transformer.

I tried connecting the AES input to another input position and the same thing happens. Anybody any clues as to what's happening?

Here's the resistor version. The Canare transformer is a transformer solution