Recording quality output transformer designed for this excellent amplifier originally used by the Beatles at Abbey Road. The design is based on the original but with our enhancements. Ratio 7:1+1. 10K/200+200 ohms. Normally used with secondary windings in parallel to give a +18 dBu at 20 Hz but may be series connected for +26 dBu at 20 Hz. Very large 50% Mumetal 50% M6 core for high output level, ultra low distortion and exceptional dynamic range. Mumetal can. Colour coded leads. Bandwidth 10 Hz to 50 kH. Can size 45 mm dia x 52.5 mm high mounting grommet (type 9980E) or 2 x M3 holes (type 9980I . Tested with Drip Electronics “Four Seven” PCB.