The Basics
Your new GK Multi-input keyboard amplifier represents the
latest advances technology has to offer. It was designed to give
the working keyboardist all the flexibility and power He/She
needs in a lightweight portable package. With three inputs the
200MK/RK can take a signal of any keyboard from an electric
piano to a programmable synthesizer, and transform it into a fully
produced, controllable sound. The 200MK/RK features treble and
bass controls on each channel as well as chorus and echo. The
200MK/RK also features direct outs and a monitor in for use in
the studio and for live performances. A careful examination of
this manual will help you to get the most from all the special
features this amplifier offers.
Piano Input
The first channel was designed for use with an electric piano. It
features a Built-in compressor for adding sustain and clarity,
chorus and echo on/off and two EQ knobs. This input is a
standard ¼'' jack capable of handling a variety of signal levels up
to 1.5v.
Synth 1&2
The next two inputs were designed to accommodate electronic
synthesizers. They also feature chorus and echo on/off switches
as well as treble and bass controls on each input. These are also
standard ¼'' jacks capable of handling up to 1.5v.
Limiter
The 200MK/RK also features a built-in Limiter for cutting out
unwanted distortion. When playing with the master volume all
the way up the limiter will hold the power amp at full power
without clipping.
Master
The master volume controls the total output of the amplifier from
off to full power.
Footswitch(see accessories)
The footswitch jack is a ¼'' Stereo jack. With the footswitch the
player can turn the chorus and echo on and off individually.
Phones
The phones jack is also a ¼'' Stereo jack. It delivers a stereo
signal for use with high impedance headphones (600 ohms or
greater). Plugging into the headphones jack does not disconnect
the internal speaker. To disconnect the internal speaker use
speaker on/off switch on rear panel.
Line Out
The direct line level out serves two functions in the 200MK/RK.
When in stereo (see mono/stereo switch) the line out acts as the
right side line out for use with the 200MP powered monitor.
When in mono the line out is a regular balanced line out.
Mono/Stereo Switch
The mono/stereo switch will change the line out and direct outs
from mono to stereo. This also changes the headphones jack
from mono to stereo.
Monitor In
This jack allows the input of a monitor send to come in and be
heard through the internal speaker but not through the line out or
direct outs.
Direct Out Right/Left
Two low impedance direct outs are provided for recording or live
performances. When operating in stereo the direct outs are left
and right. When in mono mode both directs are mono.
Int/Ext Speaker Switch
This switch allows the player to turn off the internal speaker for
headphones use or for exclusive extension speaker use.
Ext Speaker Jack
This jack is a standard ¼'' jack for the addition of an external
speaker. With the internal speaker on, an 8ohm load can be
added and with internal speaker off, a 4 ohm load can be added.
Power Switch
The power on/off switch on the 200MK is located on the rear
panel. The power switch on the 200RK is on the front panel
lower right.
Power Cord
The power cord is detachable and plugs into a socket on the rear
panel. IF a replacement cord is used or needed it should be UL
rated at 10amps, 125v; or if using 240v, the cord should be UL
rated at 5amps, 240v.
Fuse
Never operate your MK or RK with any other than the
recommended fuse.
115v operation - type TSC2A
240v operation - type TSC1A
Maintenance
Your new amplifier is rugged. It was built to give you a lifetime
of trouble-free operation. If it is operated with care, your only
maintenance problems should be cleaning. We recommend a
soft damp cloth and mild soap for cleaning outside surfaces.
Your amp can be serviced at any GK authorized service center or
at the GK factory if needed.
Accessories
Effects Footswitch; Stereo Cord; Road Bag (MK,RK) 200MP
MIC Stand Kit (MK); Rack Mount Kit(RK)
Operating Instructions MK/RK
2
