Audio Database
GL-50A
Commentary

This is a stereo power amplifier from Grand Ramray Inc. in England, which started under the close relationship with The M-O Valve Company which is famous as a vacuum tube manufacturer.

KT-77 of "Gold Lion" brand made by M-O Valve Company is used for the output tube.

Class AB1 push-pull configuration with ultra-linear connection and fixed bias system.

Model Rating
Type Stereo power amplifier
Effective power 50W + 50W (8 Ω)
Output bandwidth 20 Hz to 25 kHz
Input sensitivity 1.0V
Input impedance 100k Ω
Signal-to-noise ratio 78 dB or more
Vacuum tube used ECC82 : 4
KT-77 : 4
Pwer 110 VAC, 50Hz/60Hz
External dimensions Width 484x Height 200x Depth 258 mm
Weight 16.5kg