I searched high and low and can't find a cheap effective solution to my problem so I'm going to build my own "passive preamp." My dilemma: I have two computers, a Playstation 3, and a MP3 player all at my "home studio" (aka my bedroom). I just got a really good sounding pair of M-Audio BX5a studio monitors. They require funky cable types (TVS and XLR) and each monitor has a volume knob. I wanted a solution that allowed me to connect all my devices to a switchbox and select which input I'd like to listen to and a master volume knob that does not need to be active. Turns out I'd have to get a mixing board to do the same stuff but I want something cleaner for my desk and something small. I plan on using a stereo potentiometer for volume control. I don't need it to be amplified, just limit the voltage going through it. Radioshack has a stereo pot for $3.50. I'm at a toss up on container to use. I was thinking of making a wood box and staining it. I am also considering a plain plastic box as well as some sort of metal box like stomp boxes are made from. Cost is variable depending on my choice and my resources. I'll buy all the input jacks I need. At the moment I need mostly pairs of RCA jacks (PS3, and MP3 player) although I could go for stereo 1/8" jacks if they are available for the computers. This is the time for me to also decide how many inputs. More could be better if I get more devices someday. Now here's what I'd like some of your guys' opinions and knowledge of selector switches. I could do push button switches, toggle switches (seems coolest to me at the moment), slider switches, etc. Now if you think of the input selector knob on your old home stereo (much like old 70's Marantz receivers if you've ever had the pleasure), any idea what they call those and where I could get one from? The reason I ask is I think that would be the coolest option AND if I used any of the other types of switches, I potentially could have multiple things on at once and if there are any electrical engineers out there, could you tell me what would happen? I don't think two sources will blend if they are both selected but not sure what could happen. The output can be either TRS or XLR for the monitors. XLR seems coolest to use but the cables might cost more. Any opinion on output type is appreciated. As mentioned, the whole thing will be passive and use minimal circuitry (most likely no capacitors, resistors, or op-amps although there are the pots if you want to call them resistors then you may) so it won't need any power. I think it could potentially be a very useful project for my scenario and then I get rid of my headaches of thinking of unplugging and plugging in wires and adjust the volume on each monitor if I want it lower. So what'd'ya guys think? I'll take your feedback into consideration and I'll post pictures as soon as I start rounding up parts.