Koch Studiotone XL - Handbuch (Seite 4)

Thank you for choosing the STUDIOTONE-XL from KOCH. You now own a "state-of-the-art" all-tube guitar amplifier of the
highest quality. The STUDIOTONE-XL has been designed and built by people who - from their own experience as
musicians - take guitar sound and quality very seriously. That is why this product was designed and built with the utmost
care in order to meet all professional standards. Our goal was not only to design an amp which sounds fantastic and is easy
to operate, but also to build it in such a way that it will serve you loyally for many years to come.
Please take your time to read this manual care fully before you switch on the STUDIOTONE-XL and also please fill in the
warranty card and mail it. Thanks and lots of succes with your new STUDIOTONE-XL !
CAUTION:
 BEFORE PUTTING INTO OPERATION READ THESE OPERATING
INSTRUCTIONS CAREFULLY.
 NO USER SERVICEABLE PARTS INSIDE.
 REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY.
WARNING:
 TO REDUCE THE RISKS OF ELECTRICAL SHOCK, DO NOT REMOVE
THE COVER.
 TO REDUCE THE RISK OF FIRE OR SHOCK HAZARD, DO NOT
EXPOSE AMPLIFIER TO RAIN OR MOISTURE.
 THIS APPARATUS MUST BE EARTHED.
 TUBES ARE HOT. DO NOT TOUCH DURING OPERATION.
STUDIOTONE-XL FRONT PANEL
[1] INPUT: Input for all types of instruments, e.g. guitars
with single-coil, humbucker or active pickups.
[2] CHANNELS SWITCH: Selects the Clean, OD /
Overdrive or the OD+ / Overdrive-Boost channel, if no
external channel switch (e.g. the optional FS2-ST
footpedal) is connected to the ‘Remote Channel Switch’
jack [3] on the rear panel.
[3] H/M/L SWITCH: Selects High, Medium or Low
gain in the OD+ channel.
[4] VOLUME: Controls the volume level of the Clean
channel.
[5] GAIN: Controls the amount of distortion in the OD /
Overdrive and in the OD+ / Overdrive-Boost channel.
Accurate pre and post shaping circuitry prevent the low
end from getting muddy even at the highest settings.
NOTE: High gain settings (GAIN knob over “5” in the
OD+ channel) may cause squealing and/or excessive
hum and noise, due to microphonic guitar pick-ups
and insufficient screening of guitar-circuitry.
[6] VOLUME OD: Controls the volume level of the
OD / Overdrive channel.
[7] VOLUME OD+: Controls the volume level of the
OD+ / Overdrive-Boost channel.
[8] BASS, MID & TREBLE: Classic (post-distortion)
passive tone controls for all three channels.
[9] VOICING SWITCHES:
MID SHIFT: Shifts the operating frequency of the Treble
control from the standard frequency of 2 KHz (“0”) down to
800Hz (“+”), thus creating a very natural and musically
sounding boost in the middle frequencies.
BRIGHT: With this 3-position switch a filter can be
activated that cuts (“-“) or boosts (“+”) the high
frequencies. In the middle position (“0”) the filter is off.
[10] REVERB: Controls the amount of the Spring
Reverb signal mixed with the original dry signal.
[11] STANDBY SWITCH: Allows the STUDIOTONE-XL to
be placed in Standby (green LED off) or Active (green
LED on) mode. In Standby mode the tubes remain hot, but
the amplifier is not operational.
The green LED monitors the internal HT power supply for
the tubes. If the amp is switched from the Active to the
Standby mode, the green LED slowly dims indicating that
the HT power supply slowly loses power. The
STUDIOTONE-XL remains (partly) operational until the
LED is completely off.
[12] POWER SWITCH: Turns AC power On (red LED on)
and Off (red LED off). When the switch is Off the amplifier
is completely shut down.
NOTE: When switching the amplifier On, leave the
Standby switch
[9] in the “Off” position for 5-10 seconds
thus allowing the tubes to heat up before switching to the
Active mode.