The Neo-Classic SE/PP 300B Amplifier 10 x EL34 monoblock Features And Specifications of Manley Neo-Classic SE/PP 300B Amplifier: Vacuum Tubes: 2 x 300B (Output), 1 x 6SN7 (Driver), 1 x 6SL7 (Input), 2 x 5U4 (Rectifier) 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. Frequency Response with 5 dB FB in SINGLE-ENDED: 15 Hz - 15 Khz +/- 0.5 dB (measured at 5 watts) Frequency Response with 5 dB FB 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 Input Sensitivity with 5db FB SINGLE ENDED: 700mV for Maximum Power Input Sensitivity with 5db FB PUSH-PULL: 450mV for Maximum Power Input Sensitivity with 5db FB SINGLE ENDED: 165mV for 1V output into 8 ohms Input Sensitivity with 5db FB PUSH-PULL: 160mV for 1V output into 8 ohms 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. Input Impedance: 100Kohm, direct coupled. 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 Actual Output Impedance SINGLE ENDED: 2.25 ohms Actual Output Impedance PUSH-PULL: 1.86 ohms Damping Factor SINGLE ENDED: 3.5 Damping Factor PUSH-PULL: 4.3 Maximum Power Consumption: 240 Watts Mains Voltage Frequency: 50~ 60Hz Power transformer 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 Badge Illumination: Units produced before 7/2003 use 8V, 0.3A "Fuse-Lamp" 1/4" X 1 1/4" Serial numbers after NSEPP314 use LED illumination which probably won't burn out Dimensions: W= 8.5, D= 23, H= 9 inches, Including projecting controls and parts Shipping Weight: 41 lbs. Each. Read the Owner's Manual