Includes premium JFETs in the output -- Zout is only 50 ohms.

Specifications:
Audio module with LSK389 buffers fitted -3dB Bandwidth: 100kHz (with capacitive loads up to 1nF)
THD + N: < 0.004% (2V RMS 10K load)
Noise: > -120dB (re. 2V)
Output impedance: < 50 Ohm

Includes:
1 Projekt X Chassis 70 x 300 x 320mm
4 Iso Mount feet
6 pair DIY'rs friend RCA jack
2 knobs: CNC solid aluminum 
1 set Ultimate Volume Control Audio and Control Modules and power supply for 115/230v
1 IEC teflon hookup cable
JFET output
LED display shows volume level and selector position

Programmable Remote Control needed - not supplied

This is an assembled product as shown in the pictures. Plug and play! The diyhifisupply® Ultimate Volume Control (UVC) has been designed to offer a State of the Art volume control and input switching selection. The Ultimate Volume Control is built around the Dallas Semiconductor DS-1666 digitally controlled analogue potentiometer (DCAP), as used in all current Audio Research Preamplifiers. Unlike other common volume control chips the DS-1666 DCAP does not contain a build in op-amp, nor does it require them to be applied externally. In essence it is just a 128 Step Attenuator on a chip, using a resistor ladder and FET Switches instead of a resistor ladder and mechanical switches.
Instruction manual Here