Originally Posted by stv014
The problem is caused by a ground loop between the Titanium HD and the USB port through the Astro Mixamp. Do you really need the Mixamp, or only use it as a headphone amplifier ?
Edit: you could also isolate the Mixamp from the USB port of the PC. There are USB isolators available for $50 or less, and it is also possible to use an external power supply.
The ground loop makes sense. I could avoid that by using the outlet to power it instead of the usb port. However, I actually use the usb port as the input for my microphone.
As far as needing the Mixamp, I will not be needing it soon. Now that I have the Titanium HD I can just use its DPS for 3d-positional sound in games, and not rely on the Mixamp's dolby headphone (my motherboard could output in 5.1, but is limited in some other features that the Titanium HD has, which is why I got it).
Originally Posted by PurpleAngel
As the Titanium HD headphone jack and the Astro Mix-Amp headphone jack both are about roughly equal for powering headphones, it would seem to stop using the Mix-amp and plug the headphone straight into the Titanium HD.
Yes, that works for my Sennheiser HD595. However, I plan on getting a Hifi-man HE-400 or HE-500 (still deciding) soon. That port will not cut it for that. Plus, it is kind of a hassle to physically reach behind my computer and unplug the headphones to listen to my speakers.
I was holding off buying a headphone amp, because I have been reading that a lot of people are having success using the Emotiva amp that I already have for my speakers with their Hifiman headphones. But I am thinking that it might be a bit too powerful for efficient and low impedence headphones like the HD595. I was kind of hoping I could use the Emotiva with my speakers and Hifiman, and the Mixamp with the HD595 (since I already have it and it would save me from having to plug and unplug all the time).
It still might actually. When I got from the Titanium HD --> Emotiva --> Mixamp (via the Emotiva's RCA outs) the mouse feedback noise is significantly weaker. I can still hear it, but it is not anywhere as noticeable as when I go Titanium HD --> Mixamp.
But, tbh, I am not even using it for the Mixamp's capabilities anymore (dolby headphone). My best option is probably to just sell it and buy a dedicated (and much better) amp like the Schiit Magi. Use the Emotiva for speakers and Hifiman and the Schiit for the HD595. And just use the Titanium HD's microphone port.