Boss Audio Systems OC-20G User Manual

Thank you, and congratulations on your choice of BOSS OC-20G GK Effect.

Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY” and “IMPORTANT NOTES” (p. 18; p. 21).

These sections provide important information concerning the proper operation of the unit. Additionally, in order to feel assured that you have gained a good grasp of every feature provided by your new unit, Owner’s manual should be read in its entirety. The manual should be saved and kept on hand as a convenient reference.

Main Features

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New kind of effect for use with GK pickups and GK-Ready guitars.

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Six independent selectable octave processors: on for each string.

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Built-in distortion for ultra-heavy sound.

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Send and return for direct guitar signal.

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The controls and pedals provide simple and intuitive operation.

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Can run on battery power (six AA type).

Installing Batteries

Insert the included batteries as shown in figure, being careful to orient the batteries correctly.

fig.02

• When turning the unit upside-down, get a bunch of newspapers or magazines, and place them under the four corners or at both ends to prevent damage to controls. Also, you should try to orient the unit so no controls get damaged.

• When turning the unit upside-down, handle with care to avoid dropping it, or allowing it to fall or tip over.

• Make sure the “+” and “-” ends of the batteries are oriented correctly.

• When the batteries run down, the POWER indicator gets dim. If this happens, replace with new batteries.

• When replacing the batteries, use six AA type.

• Do not mix fresh batteries with used ones, or mix batteries of different types. Doing so can result in fluid leakage.

• Battery life can vary depending on battery type.

Continuous usage time under battery power is about 6 hours with alkaline batteries and about 2 hours with carbon batteries. (This may vary according to usage conditions.)

Making the Connections

About the GK-2A

To use the OC-20G with a guitar equipped with the GK-2A (or other GKcompatible guitar), you will need an optional GK cable. Refer to the GK-2A Owner’s Manual for instructions on installing the GK-2A.

S1/S2 Switch

The GK-2A’s S1/S2 switches correspond to this unit’s MASTER On/Off pedal and Distortion On/Off pedal, respectively.

Selection Switch

Set to the “MIX” position. Note that this unit processes tones using the instrument’s divided pickup signal (signal output when SYNTH is selected).

No sound is produced when the following settings are combined.

GK-2A This unit’s settings

SYNTH MASTER: OFF GUITAR MASTER: ON + NORMAL PU MIX: OFF (rear panel)

SYNTH VOL Knob

Controls the volume when MASTER ON is selected.

Connecting

fig.03

Guitar with GK-2A

GK-compatible guitar

AC Adaptor

PSA-series (sold separately)

or other

Guitar Amp

Making the Connections

• To get the best performance from the instrument, set your amp to “Clean” (no distortion).

• When connecting the instrument to a guitar amp, make the necessary adjustments to get the most suitable tone. When recording direct, use this with a COSM amp (GT-3, GP-20 etc.).

• When connecting a GK cable, insert the cable completely until the connector is securely locked. When disconnecting, press the connector’s lock while you detach the cable.

* Always turn the amp volume down completely before connecting and disconnecting cords. * To prevent malfunction and/or damage to speakers or other devices, always turn down the

volume, and turn off the power on all devices before making any connections.

* If there are batteries in the unit while an AC adaptor is being used, normal operation will

continue should the line voltage be interrupted (power blackout or power cord disconnection).

Turning On the Power

Be sure to observe the following order when connecting devices and switching on the power to your equipment. By turning on devices in the wrong order, you risk causing malfunction and/ or damage to speakers and other devices.

➝

Connect the GK-2A

* When the unit is running on battery power, the power comes on when you insert the connector

plug into the OUTPUT jack.

* Always make sure to have the volume level turned down before switching on power. Even with

the volume all the way down, you may still hear some sound when the power is switched on, but this is normal, and does not indicate a malfunction.

* When operating on battery power only, the unit’s indicator will become dim when battery

power gets too low. Replace the battery as soon as possible.

(Connect the AC Adaptor) ➝ Connect the Amp ➝ Turn On Amp Power

Operating Instructions

Using the Pedals

“MASTER: ON” and “DISTORTION: OFF” are selected when the power is turned on.

fig.04

When at “ON” When at “OFF”

Illuminated

Master is toggled on and off by stepping on the MASTER On/Off pedal. When switched on, the GK effect sound is output. When off, the output from the divided pickup is muted, and the sounds from the normal pickup (or the sounds input to GUITAR RETURN) are output without change.

➝

Extinguished

When at “ON” When at “OFF”

Illuminated

Distortion is toggled on and off by stepping on the Distortion On/Off pedal. When Master is off, you can switch the distortion on and off in order to prepare the settings.

Distortion is not applied to the output from the normal pickup.

➝➝➝

Extinguished

Operating Instructions

Panel Operations

In order to follow along with the instructions given here, you should start out by having Master switched ON (depress the MASTER On/Off pedal and confirm that the MASTER ON/OFF indicator has lighted). Also, step on the Distortion On/Off pedal to switch OFF distortion (DISTORTION ON/OFF indicator extinguished).

You should make GK LEVEL, OCTAVE LEVEL, DISTORTION, TONE, and LEVEL adjustments after first aligning the knob to the center position.

fig.05

Turn the OCTAVE LEVEL knob to adjust

the volume of the sound at the octave.

Try switching the MASTER

Select the tone for

the GK sound (the sound at the original pitch).

You can select from six different tones.

On/Off pedal on and off as you get the balance between the GK sound and octave sound, adjusting the levels until they are roughly the same.

Turn the

DISTORTION knob to adjust the distortion.

Turn the Level knob to adjust

the volume level.

Switch the Distortion On/Off pedal on and off and adjust until the volume levels are roughly the same.

Turn the STRING SELECT

knob to select the string to which the octave sound is to be added.

You can select from six different settings, from all strings to only the sixth string.

Turn the GK

LEVEL knob to adjust the volume of the sound at the original pitch.

Press the Distortion On/Off

pedal to turn the distortion on (DISTORTION ON/OFF indicator lit).

Turn the TONE

knob to adjust the tone.

Part Names and Functions

Front Panel

OCTAVE

fig.06

TYPE Knob

Select the tone for the GK Direct sound (the sound at the original pitch).

ACOUSTIC HARD:

ACOUSTIC MEDIUM:

ACOUSTIC SOFT: Richly resonant acoustic guitar

ELECTRIC REAR S: ELECTRIC REAR H: ELECTRIC FRONT H:

Bright and lively acoustic guitar sound.

Acoustic guitar sound between HARD and SOFT.

sound with body. Rear single coil pickup tone. Rear humbucking pickup tone. Front humbucking pickup tone.

OCTAVE LEVEL Knob

Adjusts the volume of the octave sound.

STRING SELECT Knob

Select the strings to which the octave sound is to be added.

The octave sound is added to all of the strings.

ALL: 2–6: The octave sound is added to strings 2–6. 3–6: The octave sound is added to strings 3–6. 4–6: The octave sound is added to strings 4–6. 5–6:

The octave sound is added to strings 5 and 6.

6: The octave sound is added only to the

sixth string.

GK LEVEL Knob

Adjusts the volume of the GK direct sound.

Part Names and Functions

DISTORTION

fig.07

DISTORTION Knob

Adjusts the amount of distortion.

TONE Knob

Adjusts the tone quality of the distortion sound.

LEVEL Knob

Adjusts the distortion volume.

+ 16 hidden pages