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Boss Audio Systems OC-20G - page 1
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 gai ...
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Boss Audio Systems OC-20G - page 2
2 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 ge ...
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Boss Audio Systems OC-20G - page 3
3 Making the Connections About the GK-2A To use the OC-20G with a guitar equipped with the GK-2A (or other GK- compatible 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 ...
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Boss Audio Systems OC-20G - page 4
4 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 ca ...
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Boss Audio Systems OC-20G - page 5
5 Operating Instructions Using the Pedals fig.04 “MASTER: ON” and “DISTORTION: OFF” are selected when the power is turned on. 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 fr om the divided pickup is muted, and the sounds from the normal pickup (or ...
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Boss Audio Systems OC-20G - page 6
6 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 extinguishe ...
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Boss Audio Systems OC-20G - page 7
7 Part Names and Functions Front Panel OCTAVE fig.06 OCT A VE LEVEL Knob Adjusts the volume of the octave sound. STRING SELECT Knob Select the strings to which the octave sound is to be added. ALL: The octave sound is added to all of the strings. 2–6: The octave sound is added to strings 2–6. 3–6: The octave sound is added to strings 3–6. 4 ...
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Boss Audio Systems OC-20G - page 8
8 Part Names and Functions DISTORTION fig.07 TONE Knob Adjusts the tone quality of the distortion sound. DISTORTION Knob Adjusts the amount of distortion. LEVEL Knob Adjusts the distortion volume. ...
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Boss Audio Systems OC-20G - page 9
9 Part Names and Functions fig.08 Master On/Off Pedal Each press of the pedal switches Master on or off. Distortion On/Off Pedal Each press of the pedal switches distortion on or off. POWER Indicator This lights up when the power is on. If this gets dim or fails to light up when the unit is running on battery power , it means that the batteries are ...
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Boss Audio Systems OC-20G - page 10
10 Part Names and Functions Rear Panel fig.9 GUIT AR RETURN Jack This is an input jack for connecting another effects device, electric guitar , or other instrument. When connected to this jack, you can use sounds other than the normal pickup when Master is off, and for the Mix sounds when Master is on. (refer to p.1 1, 12) OUTPUT Jack This jack is ...
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Boss Audio Systems OC-20G - page 11
11 Application Examples Using in Combination with Other Effect Devices fig.10 External Effector OUTPUT INPUT Guitar Amp Guitar with GK-2A or other GK-compatible guitar AC Adaptor PSA-series (sold separately) ...
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Boss Audio Systems OC-20G - page 12
12 Application Examples Using in Combination with Another GK EFFECT (WP-20G) fig.11 US-20 GK IN WP-20G OC-20G AC Adaptor PSA-series AC Adaptor PSA-series Guitar Amp Guitar with GK-2A or other GK-compatible guitar (sold separately) (sold separately) ...
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Boss Audio Systems OC-20G - page 13
13 Application Examples Using in Combination with the GR-33 fig.12 US-20 GR-33 P ower Amp + Speaker guitar amp simulator: ON GK GK IN MIX OUT RETURN Guitar with GK-2A or other GK-compatible guitar AC Adaptor PSA-series (sold separately) ...
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Boss Audio Systems OC-20G - page 14
14 Troubleshooting The power doesn’t come on. ❍ Is the external device connected correctly to the OUTPUT jack? ➔ Check the connections again. * When running off batteries, the unit won’t switch on unless there’s something plugged into the OUTPUT jack. This helps conserve the batteries. ❍ Have the batteries run down? ➔ Replace with fre ...
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Boss Audio Systems OC-20G - page 15
15 Troubleshooting No effects are being applied. ❍ Is the GK-2A’s selection switch set to “MIX?” ➔ When set to “ GUITAR ” or “ SYNTH, ” the necessary signals may not be input to the unit, which may prevent effects from being applied. ❍ No effects are applied to sounds input to GUITAR RETURN and normal pickup sounds. Noise is pro ...
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Boss Audio Systems OC-20G - page 16
16 Sample Settings Warm Octave Sound fig.13 Acoustic Sound (String 5, 6: Bass) fig.14 Heavy Distortion Sound fig.15 ...
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Boss Audio Systems OC-20G - page 17
17 Specifications OC-20G: GK EFFECT Controls Master On/Off Pedal Distortion On/Off Pedal TYPE Knob STRING SELECT Knob OCTAVE LEVEL Knob GK LEVEL Knob DISTORTION Knob TONE Knob LEVEL Knob NORMAL PU MIX Switch Indicator POWER Indicator (serves also as battery check indicator) MASTER ON/OFF Indicator DISTORTION ON/OFF Indicator Connectors GUITAR OUT J ...
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Boss Audio Systems OC-20G - page 18
18 USING THE UNIT SAFELY 001 • Before using this unit, make sure to read the instructions below, and the Owner ’ s Manual. ......................................................................................... 002c • Do not open (or modify in any way) the unit or its AC adaptor. ............................................................. ...
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Boss Audio Systems OC-20G - page 19
19 Read this information ”USING THE UNIT SAFELY“ 008b • Use only the specified AC adaptor, and make sure the line voltage at the installation matches the input voltage specified on the AC adaptor ’ s body. Other AC adaptors may use a different polarity, or be designed for a different voltage, so their use could result in damage, malfunction ...
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Boss Audio Systems OC-20G - page 20
20 019 • Batteries must never be recharged, heated, taken apart, or thrown into fire or water. ......................................................................................... 101b • The unit and the AC adaptor should be located so their location or position does not interfere with their proper ventilation. ............................ ...
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Boss Audio Systems OC-20G - page 21
21 Read this information “IMPORTANT NOTES” IMPORTANT NOTES 291a In addition to the items listed under “USING THE UNIT SAFELY” on page 18–20, please read and observe the following: Power Supply: Use of Batteries 301 • Do not use this unit on the same power circuit with any device that will generate line noise (such as an electric motor o ...
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Boss Audio Systems OC-20G - page 22
22 IMPORTANT NOTES Maintenance 401a • For everyday cleaning wipe the unit with a soft, dry cloth or one that has been slightly dampened with water. To remove stubborn dirt, use a cloth impregnated with a mild, non- abrasive detergent. Afterwards, be sure to wipe the unit thoroughly with a soft, dry cloth. 402 • Never use benzine, thinners, alco ...
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Boss Audio Systems OC-20G - page 23
23 This product complies with the requirements of European Directive 89/336/EEC. For EU Countries For Canada This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. NOTIC ...
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Boss Audio Systems OC-20G - page 24
G6017291 ...
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