Manley Absolute Headphone Amplifier 

 
 
 
 

Specifications

 

  • Amplifier Topology: Triode Vacuum Tube Output Stage, Switchable Topology Single-Ended or Push-Pull
  • Vacuum Tubes: 2 x 12AX7 (ECC83), 4 x 6AQ5A (EL90)
  • Inputs: 2 x RCA (Input 1 & Preamp Output = Pass-Thru when amplifier is in Standby or Off)
  • Input Impedance: 50 kOhms (Pass-Thru= 300 kOhms)
  • Maximum Input Level: 7.7 VAC RMS (+20 dBu) (Conditions: XLR output, PP mode, 16 ohm load, VOLUME max, EQ out, 1kHz sine wave)
  • Gain: Load 16 ohm: 12 dB (Min FB), 3 dB (Max FB). Load 62 ohm: 17 dB (Min FB), 8 dB (Max FB). Load 200 ohm: 22 dB (Min FB), 13 dB (Max FB) (Conditions: XLR output, PP mode, VOLUME Max, EQ out, 1kHz sine wave)
  • Input Sensitivity: 600 mV AC RMS for an output of 100 mW 1.9 VAC RMS for an output of 1W. (Conditions: XLR output, PP mode, FB 12:00 o’clock, 16 ohm load, 1kHz sine wave, VOLUME max, EQ out)
  • Volume Control: Precision Stepped Relay Attenuator 0.5dB per step - 63dB total attenuation – Volume setting to minimum = MUTE
  • Outputs (transformer coupled): 1 pair RCA- Unbalanced (Preamp Output). 1 x TRS ¼” JACK – Unbalanced. 1 x 4 PIN XLR- Balanced. XLR-pin outs - (Left Channel Pin 1= Signal (+), Pin 2= Signal (-), Right Channel Pin 3= Signal (+), Pin 4= Signal (-)).
  • Output Impedance: Switchable: Low 12-50 Ohm, Mid 50-200 Ohm, High 200-600 Ohms
  • Maximum Output Power = 1W into 12 Ohms BW 22Hz-22kHz
  • Variable Feedback Control (FB): MIN 0dB. MAX 10dB (Conditions: BAL output, PP mode, 16 ohm load, VOLUME max, EQ out)
  • Signal to Noise Ratio: 83 dB (1kHz sine wave, 100mW output, BW 22Hz-22kHz) (Conditions: BAL output, PP mode, FB 12:00 o’clock, 16 ohm load, VOLUME max, EQ out)
  • Noise Floor: -80 dBu BW 22Hz-22kHz. -85 dBu  A-Weighted (Conditions: BAL output, PP mode, FB 12:00 o’clock, 16 ohm load, VOLUME MAX, EQ out)
  • Channel Crosstalk: -71 dB (1kHz sine wave, 100mW output, BW 22Hz-22kHz) Left Channel -72 dB (1kHz sine wave, 100mW output, BW 22Hz-22kHz) Right Channel (Conditions: BAL output, PP mode, FB 12:00 o’clock, 16 ohm load, EQ out)
  • Balance Control Channel attenuation: Left Channel= 72dB (1kHz sine wave, 100mW output, BW 22Hz-22kHz). Right Channel= 72dB (1kHz tone, 100mW output, BW 22Hz-22kHz) (Conditions: BAL output, PP mode, FB Min, 16 ohm load, EQ out)
  • Frequency Response: Push-Pull= Flat 10Hz – 20 kHz (-1dB @ 40 kHz). Single-Ended= 20Hz – 20 kHz (-0.5dB @ 10Hz, -1dB @ 50 kHz). (Conditions: BAL output, 100mW output, FB @ 12:00 o’clock, 16 ohm load, EQ out)
  • Distortion: Push-Pull= 0.16% THD+N (BW 20Hz-22kHz) Single-Ended= 1.0% THD+N (BW 20Hz-22kHz). (Conditions: BAL output, PP mode, 1 kHz sine, 100mW output, FB @ 12:00 o’clock, 16 ohm load, EQ out)
  • Supplied with Remora RF remote control
  • Soft Start, 30 second mute-controlled power-up sequence
  • Operating Mains Voltage: 90-250 VAC, 50-60Hz, universal works worldwide
  • Unit Dimensions: 11.5 x 5.5 x 8.2” (LxWxH)
  • Unit Weight: 12 lbs
  • Shipping Weight = 13.5 lbs
  • $4,500 USD

 

 
 
 
 
 
 
 

Grover Neville