SPECIFICATIONS

• Vacuum tubes:

• Output 2 x 300B

• Driver 1 x 6SN7

• Input 1 x 6SL7

• Rectifier 2 x 5U4

• Output Power @ 1kHz with 5 dB Feedback in SINGLE-ENDED: 11 Watts @ 3% THD

• Output Power @ 1kHz with 5 dB Feedback in PUSH-PULL: 24 Watts @ 1.5% THD.

• Input Sensitivity with 5db Feedback SINGLE ENDED: 700mV for Maximum Power

• Input Sensitivity with 5db Feedback PUSH-PULL: 450mV for Maximum Power

• Input Sensitivity with 5db Feedback SINGLE ENDED: 165mV for 1V output into 8 Ohms

• Input Sensitivity with 5db Feedback PUSH-PULL: 160mV for 1V output into 8 Ohms

• Input Impedance: 100 kOhm, direct coupled.

• Actual Output Impedance SINGLE ENDED: 2.25 Ohms

• Actual Output Impedance PUSH-PULL: 1.86 Ohms

• Optimum Speaker Load (switchable): 4 to 12 Ohm range appropriate for 4 & 8 Ohm speakers;

• 12 to 20 Ohm range appropriate for 16 Ohm speakers

• Damping Factor SINGLE ENDED: 3.5

• Damping Factor PUSH-PULL: 4.3

• Freq. Response with 5 dB Feedback in SINGLE-ENDED: 15 Hz - 15 kHz ±0.5 dB (measured at 5 watts)

• Freq. Response with 5 dB Feedback in PUSH-PULL: 10 Hz - 20 kHz ±0.5 dB

• GAIN SE Mode 0dB Feedback Setting: 30 dB

• GAIN SE Mode 10dB Feedback Setting: 20 dB

• S/N Ratio: SINGLE ENDED: 83.5dB Ref. 1W; 2.83v//8 Ohms,20KHz BW; 5dB FB.

• S/N Ratio: PUSH-PULL: 85.4dB Ref. 1W; 2.83v//8 Ohms; 20KHz BW; 5dB FB.

• Dynamic Range: SINGLE ENDED: 94dB Ref. 3% THD; 20KHz BW; 5dB FB.

• Dynamic Range: PUSH-PULL: 99.5dB Ref. 1.5% THD; 20KHz BW; 5dB FB.

• Maximum Power consumption: 240 Watts (idle)

• Factory set for 100V, 120V or 220-240VAC operation for original destination country's mains voltage.

• Operating Mains Voltage changeable with power transformer re-wiring and fuse value change.

• Mains Fuse 100-120VAC operation: MDA 3 Amp SLO-BLO Ceramic Time-Delay fuse

• Mains Fuse 220-240VAC operation: MDA 1.5 Amp SLO-BLO Ceramic Time-Delay fuse

• B+ Fuse: MDA 400 mA SLO-BLO Ceramic Time-Delay fuse

• Mains Voltage Frequency: 

• Dimensions: W=8.5", D=23", H=9" 

• Minimum Mounting Surface Dimensions: Feet Footprint = W= 7.5" D= 18"

• Shipping weight: 41 lbs. each 

• Badge Illumination: Units produced before 7/2003 use 8V, 0.3A "Fuse-Lamp" 1/4" X 1 1/4" 

HISTORY

These amps were originally purchased directly from Manley Labs by my Gestalt teacher E. Erikson, who played Jazz to the migrating whales from his cliffside perch at the Esalen Institute. I am the second owner. The full, rich, warm tones of these amps are truly awe inspiring, but are unfortunately impractical for my life as parent of a young child in a small Big Sur cabin. The amps were professionally serviced by Audio Rehab in Los Angeles earlier this year (2024), and are performing flawlessly. These are rare and exquisite treasures, and I hope they find a loving home with a kindly audiophile. – Fletcher Tucker

LINKS

Visit Manley Labs’ website for the original write-up about these amazing amps.

Included with your amps…

A pair of 3-meter Coincident Speaker Technology Speaker Cables and a pair of 2-meter CST Interface Cables - Quantum Leap Interconnect (combined value of over $1,000), as well as the original owner’s manual.

Shipping is free in the USA.

CONTACT

Feel free to reach out to make me an offer, arrange to pay in another way, or ask me anything.