Specifications:

Power:
LP260m - 270 Watts from 30 Hz to 15 KHz at no more than 1.5 % THD or IMD, driven into 4 ohms (also available connected for 8 or 16 ohm loads)
Sensitivity:
LP260m - 1.8 Volt rms to rated power
Frequency Response (at 10 watts):20 Hz to 20 kHz, +/- .1 dB
Hum and Noise: 104 dB below rated power
Input Impedance: 100 kOhms
Tube Complement:
LP260m – 1 M8080, 1 6N30P, 8 KT120
Dimensions: 19D x 19W x 7.1H inches
Weight:
LP260m – 83 lb