Koch Multitone User Manual

FRONT PANEL FUNCTIONS
[1] INPUTS :
HIGH - Input for standard-level instruments, e.g. guitars with passive pickups.
LOW - Input for high-level instruments, e.g. guitars with high-output passive or
active pickups.
Both inputs may be used for connecting two instruments simultaneously.
[2] BASS, MID & TREBLE : Classic passive tone controls that regulate low,
mid and high frequencies respectively, of the Clean and the Pre-EQ Overdrive
channel. In the Pre-EQ Overdrive channel the tone control circuit is located
before the overdrive stage, therefore pre-shaping the overdrive tone which
results in a bluesy type of distortion with lots of mid-range harmonics.
[3] VOLUME : Controls the volume level of the Clean channel.
[4] DRIVE : Controls the amount of amplification in the Pre-EQ Overdrive
channel. Cleaner sound is achieved at lower settings (3 to 5), at higher settings
(5 to 10) medium overdrive occurs which will produce more sustain and
distortion.
[5] VOLUME : Controls the volume level of the Pre-EQ Overdrive channel.
[6] GAIN : This 'Dual-Gain' is a very powerful feature combining Drive and
Gain-Boost in one knob. This has been achieved by controling the amount of
amplification in the Post-EQ Overdrive channel preamp in two stages
simultaneously. Cleaner sound is achieved at lower settings (3 to 5), at middle
settings (5 to 10) medium overdrive occurs which will produce more sustain and
distortion. At high settings (10-20) mega overdrive occurs, adding loads of
sustain and compression. Accurate pre and post shaping circuitry prevent the
low-end from getting muddy even at the highest settings.
MULTITONE - USER MANUAL
NOTE: High gain settings may cause squealing and/or excessive hum and
noise, due to microphonic guitar pick-ups and insufficient screening of circuitry.
[7] VOLUME : Controls the volume level of the Post-EQ Overdrive channel.
[8] PRESENCE : Controls the amount of boost in the upper mid frequency
range of the Post-EQ Overdrive channel.
[9] BASS, MID & TREBLE : Classic post-distortion passive tone controls that
regulate low, mid and high frequencies respectively, of the Post-EQ Overdrive
channel. In this channel the tone control circuit is located behind the overdrive
stage, therefore equalising the overdrive tone which results in better control
over the harmonics at high gain settings and a more rough-sounding distortion.
[10] RHYTHM VOLUME : When activated (see Footswitch), this control
functions as a master volume and can be preset at a lower (rhythm) volume.
NOTE: If the Footswitch is not connected, the RHM VOLUME is active.
[11] REV/FX MIX CONTROL : Controls the amount of the Spring Reverb or
Effects signal (see rear panel [5]) mixed with the original dry signal.
[13] DAMPING SWITCH : Switches speaker damping from High to Low. In High
(normal) position the power amp damps the speaker which results in a more
controlled sound. In Low position the power amp's damping of the speaker's
cone-movement is minimal, which results in a more open sound.
[13] STANDBY SWITCH : Allows the amp to be placed in standby or active
mode. In standby mode the tubes remain hot, but the amplifier is not
operational.
[14] POWER SWITCH : Turns AC power On and Off. When the switch is Off
the amplifier is completely shut down. When switching the amplifier On, allow
the tubes to get hot before switching to the active mode [13
MULTITONE - USER MANUAL