





A speaker impedance load of .. should be used to avoid distortion or damage to the amplifier. K EXTENSION SPEAKER OUTPUT—Plug-in connection for an external speaker. This jack is wired in parallel with the INTERNAL SPEAKER JACK {J} and affects the speaker impedance load. Use .. minimum total. Specifications Tube locations left to right at rear: 5 6 6 12 12 Y V V A A 3 6 6 X X GT GT GT 7 7 A A* *For original low-gain 1957 sound, substitute a 12AY7 for this preamp tube. Replacetubesonlywithsametype