Manley Laboratories "Retro" SE/PP 300B Monoblock Tube Amplifier Pair

Features and Specifications Manley "Retro" SE/PP 300B Monoblock:

• 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