This pair has had the following upgrades installed at the factory: Upgrade to KT120 Tubes. Wiring w/ Cardas wire. Upgraded caps top line Mundorf silver/gold. Upgraded to Vishay resistors. Chassis modifications for lowering board height to fit standard cover with KT120 tubes. Fully matched sets. Upgraded Cardas binding posts. Upgraded Cardas XLR inputs. Upgraded PSU and DC Heater PSU. NOS Mullard tubes, Driver and output.
Triode Wire Labs 7 Plus
Power cords for the amps.
Duende Criatura 19-22 mm
For the NOS tubes.
Herbie's UltraSonic RX
For the KT120s
Emotiva XPA-1
2 Mono Amps running in 8 ohms (500w/ch)
Emotiva XPA-2
Stereo amp, just for the wide speakers (300w/ch)
Emotiva XPA-5
5 channel amp, for surrounds and center (200w x 5 ch)
Also to add, the XPA-1's first 10 watts are class A via conversations with the lead engineer (Lonnie). The XPR-1 while being twice as powerful (1000W 8ohm) than the XPA-1's (500W 8ohm) the XPR-1's have no Class A power via tech support.