With the current resurgence of interest in the "retro" technology and particularly in single-ended retro technology, the matter of sufficient drive power for modern loudspeakers becomes a very real problem. We came to the conclusion that the market needed one 'BIG BOY' single-ended amplifier. 

The 150 / 75 SE/PP 807 MONOBLOCKS can switch from either 75 watts in single-ended to 150 watts in push-pull. The 807 tube was chosen for good reasons: easy availability and high reliability, but mainly for its glorious sound in its (intended design parameter) triode-strapped configuration. We chose 8 of them in parallel as the output stage which presents a favorably low anode impedance to the very special MANLEY output transformer which in turn provides a very low impedance drive to the loudspeaker and a much higher damping factor than other single-ended designs. Single-ended detail with high-power brawn. You won't run out of power with this amplifier. 




  • Single-Ended: 72 watts
  • Push-Pull: 150 watts
  • Frequency Response @ +-1 dB
  • Single-Ended: 18 Hz - 20 KHz
  • Push-Pull: 10 Hz - 50 KHz
  • Input Sensitivity: lV nominal
  • Input Impedance: 40 kOhm
  • S/N ratio: Typically 86 dB
  • Noise floor: -76 dB (10Hz-30KHz)
  • Dynamic Range: 107dB
  • Power Consumption: 250 Watts
  • Factory set for 100V, 120V or 220-240VAC operation for original destination country's mains voltage. 
  • Operating Mains Voltage changeable with power transformer rewiring and fuse value change.
  • Mains Voltage Frequency: 
  • Dimensions: W=19", D=13", H=8"
  • Shipping weight: 75 lbs. each

Specifications subject to change because they just might.