Herron Audio M1A Mono Amplifiers

Pair of Herron monaural amplifiers in excellent condition. I am the second owner, as they were purchased here on AG in mint condition June of 2015. The amps were shipped directly to Herron for inspection and the M1A upgrade. Likely near 50-60 hours of listening time as my work has involved a lot of travel and my better half was to intimidated to use the system. We moved to a simpler system and a grand piano for her. I am unable to detect any notable marks or scratches etc. The amps have always been in a conditioned and non-smoking home. Ad price includes free shipping & Insurance ($175+ value) to the lower 48 states, no extra Paypal fees. Amps will be shipped in their original factory supplied individual (2) double boxes with foam isolators for safe travel. 

Specifications:
Frequency response 20 Hz to 20 kHz ±0.1 dB
Output Power 150 watts @ 8 ohms, 275 watts @ 4 ohms (measurements at 1 khz)
Gain 24 db
Input impedance 220k Ohms
Absolute polarity Non-inverting
Power Requirements 100, 120, 230, 240 VAC. 50/60 Hz. Standard IEC power connector. Toroidal transformer taps internally selected for appropriate voltage
Dimensions 17.6" wide x 4" high (including rubber feet) x 11" deep