New Old Sound McONE Passive Monitor Controller

I've had this thing for a little over a year, and it has been fantastic. I would love to keep it, but I no longer run two sets of monitors, so I can't justify it other than having a second volume control for my audio interface. When I did have two sets of monitors it was great, the functionality was flawless, and it did not color the sound at all. It has only left the studio twice to move locations, it's in excellent condition, looks great on any desk, and comes in the original box!

From Zen Pro Audio's website:
Product Description

This is the standard volume pot version.

If you need a simple, inexpensive solution for your studio monitoring – McONE is the answer. Assembled from quality parts in a nice desktop box with common monitoring functions, McONE will not change your sound in the least. There are no active parts at all and no power supply. Balanced ¼'' TRS sockets on the back panel provide easy connections to your sources and studio monitoring system. A big volume knob on a carefully selected potentiometer gives a pleasant operational feeling.

Model Differences

• Standard model uses a high quality Alps pot
• Stepped model uses a 23 step rotary switch and resistor network

Features

• 3 input
• 3 output
• Balanced ¼'' TRS connections to sources and monitoring system
• Stereo/Mono switch
• Mute/Unmute switch
• All Passive, no power supply needed
• Compact desktop enclosure
• Technical Specifications
• Input impedance: 10kOhm
• Output impedance: 5-10kOhm (Depends on your monitor impedance)
• Dimension: Width 7.75" x Depth 6" x Height 3.25"
• Weight: 2.45 LBS