The API Select TranZformer
®
GTR provides unsurpassed sonic sculpting by incorporating key elements of
legendary API preamp & equalizer circuits into a versatile and robust guitar effects pedal. Features include a
buffered bypass in/out footswitch, variable gain preamp, 3-band tone control with guitar-optimized
frequency ranges, transformer output, and of course the classic API sound.
SIGNAL FLOW (from right to left):
Input > Gain > Clean Boost/Overdrive > Tone Controls > Transformer Output
AUDIO CONTROLS
1. GAIN: Variable gain preamp control; 0dB to +40dB; More gain creates more boost/overdrive
2. HF Tone Control: Boost/Cut control for 5kHz frequency band (+/-15dB MAX, peak/shelf style)
3. MF Tone Control: Boost/Cut control for 1.5kHz frequency band (+/-15dB MAX, peaking style)
4. LF Tone Control: Boost/Cut control for 200Hz frequency band (+/-15dB MAX, peaking style)
SWITCHES
A. OUTPUT PAD: Inserts a 20dB output pad. Useful if going into a guitar amp input.
B. HF Peak/Shelf Switch: Set the high-frequency band to either peaking or shelving mode.
C. MODE: Configures the input preamp stage in
to either an undistorted “CLEAN BOOST” mode or an
“OVERDRIVE” mode which overdrives the API 2510 input amplifier. In OVERDRIVE mode, the
amount of distrotion can be fine-tuned using the GAIN control.
D. BYPASS: Buffered bypass footswitch
E. Indicator LED is illuminated when pedal is engaged
GTR
GUITAR PEDAL USER GUIDE
1
2
3
4
A
B
C
D
E
