TK-40
Preamp
Owner’s Guide
Technical Specifications TK-40
Power Supply: 9 Volt
Output: 220mV
EQ Control
BASS (60Hz): ± 10 dB
MIDDLE(400Hz): ± 3 dB (Mid Switch OFF)
MIDDLE(800Hz): ± 6 dB (Mid Switch OFF)
MIDDLE(400Hz): ± 13 dB (Mid Switch ON)
MIDDLE(800Hz): ± 8 dB (Mid Switch ON)
TREBLE(10KHz): ± 12 dB
Low Battery: 6.7 Volt
Notch Frequency: 65~105Hz
Current: 4mA (tuner on 13mA)
Auto chromatic Tuner
Tuning Range: C1(32.703Hz)~B7(3951.07Hz)
Accurary: ±1 Cent
Tuner auto off time: 2 minutes
Tuner switch function:
Single Press of tuner switch: TUNER ON
Second Press of tuner switch: CALIBRATE TO PITCH
Press and Hold Switch: TUNER OFF
Publication Number:
Mid Contour: This switch, when engaged, will activate a preset EQ curve that will
offer a great starting point for “dialing in” your sound. All other EQ controls (unless
bypassed) will still act normally in tandem with this circuit.
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