I want to use the GSX 1000 as a DAC and Q4 as an amplifier. GSX 1000 has 3.5 mm outs. Fosi Q4 has a coaxial in. I would like to have headphones and speakers connected and be able to switch between them with the GSX 1000. Is it possible? If so, what am I missing? Thanks so much for any advice!

I'm getting a HDVD 800 for my HD 800's next month and i'm going to be connecting it to my pc via usb, and to my pc's sound card via optical, as i want to add the sound cards suround effects to the HDVD 800 for when i'm watching a movie or playing a game. (I've heard that this is possible, but...

I'm getting a HDVD 800 for my HD 800's next month and i'm going to be connecting it to my pc via usb, and to my pc's sound card via optical, as i want to add the sound cards suround effects to the HDVD 800 for when i'm watching a movie or playing a game. (I've heard that this is possible, but...

Title says it all. What is better and why?   O2+ODAC 2 in 1 combo is 295 including shipping.   Schiit Magni+Modi is 275 including shipping.   Other recommendations are welcome. To me though, these seem like the two best sub 300$ solutions for a Sennheiser HD 650.