Motion Sound KT-80 - Manual (Page 2)

2
-DESCRIPTION-
The Motion Sound KT-80 is a state-of-the-art amplifier for keyboard providing all of the
features necessary to reproduce clean hi-fidelity and real tube overdrive sound independently.
The two channels employ technology that is specifically targeted to reproduce and enhance the
sound of instruments normally associated with each channel. The hi-fidelity channel = piano,
strings, synthesizer, etc. The tube channel = organ, electric piano and any other sound that can
benefit from warn tube overdrive. The XLR balanced input is for microphone use. An XLR
output provides a convenient “line-out” signal for PA connection.
-QUICK SETUP-
1. Tube Channel: Set pre gain to “3”
Set contour to “0”
Set post-gain to “7”
Set bass and treble to “5”
2. High Fidelity: Set volume to “4”
Set bass and treble to “5”
3. Switched: The switched channel is assigned to the hi-fidelity channel (unless a
optional foot switch is used).
-TUBE CHANNEL OPERATION-
Pre-Gain
The KT-80 employs Motion Sound’s unique symmetrical clipping 12AX7EH pre-amp topology.
This design provides silky-smooth sound until pushed into clipping, at first crunch and at
extremes provides a massive gnarly overdrive similar to a tube output stage. A combination of
keyboard volume, volume pedal and pre-gain settings determine the overall drive of the 12AX7.
Contour
The contour control can remove lows or highs from the input signal, allowing you to overdrive
the 12AX7 with the frequencies you desire. The frequency center is approximately 800 Hz.
CCW removes treble; CW removes bass.