"IGS Audio Tilt n Bands, Stereo Tube Mastering Equaliser, Frequency range: 20 to 40,000 Hz (+/-0.3 dB), Rotary controls for tilt, bass, mid, treble and trim, Frequency selection switch for bass (50, 100, 250 Hz), mid (500 Hz, 1 kHz, 2.5 kHz) and...
