I have a Panasonic Plasma (only audio out is SPDIF) connected to a fiio D3 DAC via the SPDIF. Attached to the RCA out on the fiio are two M-Audio BX5a monitors. I want to know the cheapest way to control the sound without having to adjust it from the back of the monitor, via a knob or remote or something.
The BX5a has two XLR ports on the back that I'm not using, if that helps.
Preferably, I'd like it to be wireless. Doing some research, I came across this knob (http://www.tcelectronic.com/level-pilot/), but it's rather expensive and I don't know how it'll interact with/affect the fiio (http://www.amazon.com/D3-Digital-Converter-Optical-Toslink/dp/B005K2TXMO/ref=sr_1_2?ie=UTF8&qid=1357836148&sr=8-2&keywords=fiio+d3).
Any suggestions would be great! I'd like to use the monitors because I already have them and they sound much better than my Vizio soundbar, and I have no room for a full sound system.