PAIR of VTG Sound Valves M40 Mono Tube Power Amplifiers – Dynaco MK IV. The amplifiers are in near mint condition! There are some very minor imperfections. Both amps power up as they should and they work great. The tubes come with the amps. Note this is a matched set w/ consecutive serial numbers! Please be sure to check out my other listings as I will have many other vintage audio and radio-related items up for sale.

OPEN TO FAIR OFFFERS. The listing price is for a. EICO HF-60 Mono Tube Amplifiers based on EL34/6CA7 Tubes. No tubes are included. The tubes shown are for testing only; not included. The output transformers are the sough-after Acrosound TO-330 As far as I can tell, they are in original configuration. I hooked them up on a variac, set up to 80v. Both powered up OK. One amp generated hum sound but did pass music through to the connected speaker. The other didn’t produce music nor hum. On this amp, the connected speaker did produce cracking noise as I wiggle the small tubes. So, at least, the output and power transformers are all good. By visual inspection, I can tell they are reasonably nice; no signs of abuse, burn, damage. Shot me any questions and I’ll try to answer. I have other audio equipment, like. Accuphase, Acurus, Adcom, Aragon, Arcam, Audio Research, Audioquest, Ayre, B&K, B&O, Bang Olufson, B&W, Bowers Wilkins, Bryston, California Audio Labs, Cary, Classe, Cambridge, Carver, Conrad Johnson, Creek, Denon, Dynaco, Dynaudio, Goldmund, Infinity, Jadis, JBL, Jolida, JM Lab, Kef, Kimber, Klipsch, Krell, Levinson, Lexicon, Linn, Marantz, Martin Logan, Mccormack, Mcintosh, Meridian, MIT, Musical Fidelity, Music Hall, NAD, Naim, Nakamichi, NHT, Paradigm, Parasound, Pass, Pioneer, Proceed, PS Audio, PSB, Quad, Rega, Revel, Rotel, Rowland, Sonic Frontiers, Sonus Faber, Spendor, Sunfire, Tandberg, Tannoy, Theta, Thiel, Threshold, Totem, Transparent, Vandersteen, Vmps, VPI, VTL, Velodyne. AR, Audio, Audiophile, Amplifier, Amps, Arcam, Acurus, Aragon, Adcom, ADS, Advent, Bose, Boston, Beovox, Bryston, Bedini, B&K, B&0, B&W, Bowers & Wilkins, Celestion, Counterpoint, Canton, Cello, Creek, Cerwin Vega, Dahlquist, Denon, Dcm, Dynaco, Dynaudio, Ess, Spica, Epicure, Ensemble, Electrostatic, Elite, Fisher, Fosgate, Harman kardon, Harbeth, Integra, Infinity, JBL, Jadis, Jolida, Linn, Luxman, KEF, Klipsch, KLH, Krell, Kenwood, Martin Logan, McIntosh, Mirage, Mission, Monitor Audio, Nad, Onkyo, Paradigm, Proac, Sony, Pioneer, Polk-Audio, Preamplifier, Quad, Rogers, Rotel, Rega, Stanton, Speakers, Audio, Stereo, Studio, Vandersteen,, Snell, Spendor, Thorens, Vandersteen, Wharfedale, Yamaha, Speakers, Turntable, M&K, Accuphase, Dali, Wilson Audio, Sonus Faber, Definitive Technology, PSB, NHT, Magnepan, Eminent Technology, Monitor Audio, Vienna Acoustic, Meridian, Behringer, Acoustat, Genesis, Opera, Mirage, Energy, Pinnacle, Musical Fidelity, Sonic Frontiers, Cambridge Audio, Sunfire, Velodyne, SVS, HSU Research, Audio Research, Tannoy, Subwoofer, McCormack, Meadowlark, Conrad Johnson, Parasound, Magneplanar, Audible Illusions, Mark Levinson, Vintage, REL, Revel, Nakamichi, ESS, Emotiva.

Williamson circuit built on a AMI R-145 chassis, with Unitran 6U38 output transformers. Improved version with vintage volume pot, they can be used without preamplifier, no more empty holes!! 5/8/16 & 400 OHM SPEAKER TAP! Extremely quiet on 100db speakers! NO TUBES INCLUDED IN THE SALE!!

These amplifiers were removed from a working environment.