Koch Powertone III User Manual download pdf (Page 4)

E N G L I S H

Thank you for choosing the POWERTONE-III from KOCH. You now own a "state-of-the-art" all-tube guitar amplifier of the highest

quality. The POWERTONE-III 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 carefully before you switch on the POWERTONE-III and also please fill in the warranty

card and mail it. Thanks and lots of succes with your new POWERTONE-III !

CAUTION:

* BEFORE PUTTING INTO OPERA-

TION 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.

FRONT PANEL FUNCTIONS

[1] INPUT

Input for an electric guitar

[2] CHANNELS SWITCH: Selects Channel-1 or Channel-2 if the

FS-4 Footswitch is not connected.

[3] GAIN: Controls the amount of gain in Channel-1.

A totally clean sound is achieved at lower settings (1-4). At middle

settings (4-7) the sound will get more juicy. At high settings (7-10)

medium overdrive occurs which will produce more sustain and a

subtle distortion. In order to maintain the volume at the same level

the Volume knob [4] has to be turned down.

The best setting also depends on the output level of your pick-ups.

For example to get a clean sound 1-3 will work well for high-output

humbucker pick-ups while 2-4 the best range is for low output

single coils.

[4] VOLUME: Controls the volume level of Channel-1.

[5] BASS, MID & TREBLE: Classic passive tone controls for

Channel-1.

[6] GAIN BOOST: Selects Medium Gain for Crunchy sounds

(down) or High Gain for Lead sounds (up), in Channel-2.

[7] GAIN: Controls the amount of distortion inChannel-2.

A cleaner sound is achieved at lower settings (1-3). At middle

settings (3-6) the sound will get more distorted and harmonically

richer. At high settings (6-10) high-gain overdrive occurs with more

sustain and distortion.

NOTE: If the Gain Boost is switch on, squealing and/or

excessive hum and noise may occur at high Gain settings, due

to microphonic guitar pick-ups and insufficient screening of

guitar-circuitry.

[8] VOLUME: Controls the volume level of Channel-2.

[10] OTS ON: This switch places the OTS circuit in the signal path.

[11] OTS DRIVE: This DRIVE knob controls the amount of (output

tube) saturation of the OTS circuit.

[12] OTS VOLUME: Controls the volume level of the OTS circuit.

NOTE: OTS stands for Output Tube Saturation. The Powertone-III

is equipped with a 0.5 Watt all-tube power amp, not for driving any

speakers but pure for creating new harmonic structures. This

unique feature enables you to add real tube-power-amp distortion

to all your sounds, clean as well as distorted! If CH1 is on, you

can create nice and musical saturation of clean tones; in CH2 you

can really fatten up all your crunchy or even your high-gain

distortion tones.

If the OTS is activated the small tube-power-amp is placed in the

signal path, like it was plugged in as an effects unit in an effects

loop.

[13] DEPTH: Controls the amount of boost in the lower frequency

range of both channels.

[14] PRESENCE: Controls the amount of boost in the upper mid

frequency range of both channels.

[15] VOLUME-I: If activated with the FS-4 footswitch, this

master volume control can be preset at a lower rhythm level.

[16] VOLUME-II: If activated with the FS-4 footswitch, this

master volume control can be preset at a higher solo level.

[17] STANDBY SWITCH: Allows the POWERTONE-III to be placed

in Standby mode (down) or Active mode (up). In Standby mode the

tubes remain hot, but the amplifier is not operational.

[18] BLUE LAMP: Indicates that the Power Switch (back panel) is

switched on.

BACK PANEL FUNCTIONS

[1] POWER SWITCH: Turns AC power On (blue lamp [18] on) and

Off. When the switch is Off the amplifier is completely shut down.

NOTE: When switching the amplifier on, leave the Standby switch

[17] in the down position for 5-10 seconds thus allowing the tubes

to heat up before switching to the "Active" mode (up).

When switching the amplifier off, first switch to "Standby" [17]

mode (down) and allow the amp to dim completely before

switching the power off.

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Koch Powertone III User Manual Page 4

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