Coincident Speaker Technology M300B Frankenstein Mono Amp

Listing this after just buying as mostly trial and it not working out in my system. Both amps are working perfect and so are the tubes. This is the original version of Frankenstein with mark 2 upgrades which include improved caps, power supply energy storage, resistor replacements, wiring changes, recalibration of operating voltages and tighter regulation of the voltages with higher quality rectifiers.

Output power: 8W
Frequency response: 20Hz-20kHz +/-1dB
THD: <1%, 20Hz-20kHz at reference output of 8W
Input sensitivity: 700mV
Input impedance: 100k ohms
S/N: >90 dB
Tube complement: One each 6EM7, 300B, 5U4G/channel
AC power: 115V or 230V+/-5%, 50/60Hz (selectable)
Built to the absolute highest standard:
All hardwired
The finest 6N copper interstage,output and power transformers
Finest Teflon caps
All polyproylene power supply
Self biasing
3 tube configuration (6EM7 input driver, 300B output, 5U4 rectifier) for purest sonics
Triangular chassis shape to ensure rigidity
These amps represent a sonic breakthrough. Their transparency and absence of an electronic sound set new standards. 
Over $1000 worth of all new tubes within the last year. Approximately 350 hours.  Coincident 300B (Black treasure psvane), Phillips 6em7, Mullard CV 378 
Dimensions: 15" x 9" x 14"
Net weight: 34 lbs.
MSRP: $5995 per pair