Are you the type of musician who settles for nothing less than the absolute best? Then youve come to the right place. BOSS new Twin Pedal Series gives guitarists and bassists unrestricted access to some of the finest effects on the planet, with programmable memories and simple, knob-based controls. Designed using the most advanced components and innovative technologies, Twin Pedals are perfect for discriminating musicians who simply want the best that BOSS has to offer.
s s s s Extremely high-quality guitar and bass effects pedals with simple knob-based controls Professional sound quality using select components and advanced construction throughout Durable metal chassis construction with same height as BOSS compact pedals Five-year limited warranty
22 Killer Amp Models Right Beneath Your Feet!
The GP-20 Amp Factory starts where other pedals leave off, taking you far beyond overdrive and distortion with a variety of incredible COSM Guitar Amp models designed for live performance 22 in all! Thanks to its simple knob-based controls, two-channel operation, and outputs designed for connection to a standard guitar amp, the brilliant GP-20 can turn any guitar amp into a three-channel tonal monster. For recording applications, the GP-20 even includes a convenient digital output.
q COSM Amp Modeling pedal with 22 amp models optimized for live performance q 2-channel operation (Manual/Memory) plus Bypass turns any guitar amp into a 3-channel amp q Output Select switch permits connection to guitar amps or line-level systems q 4 onboard speaker cabinet simulations plus digital output for recording

s COSM Amp Types

From British classics to modern American screamers, the GP-20 gives you lots of amp models to choose from.

s Speaker/Cabinet Types

VARIATION ON
This is a sound with flat response. This is a persistent, fat, midrange sound suited to blues. This is a lead sound with a distinctive midrange. This models a Fender Twin Reverb with brightness on. This models a Fender Pro Reverb. This models a Matchless D/C-30. This models the clean sound of a VOX AC-30TB. This models the sound of a Marshall 1959 with Inputs I and II connected in parallel. This models the sound of a Marshall with a modified midrange boost. This models the rhythm channel of a Peavey 5150.
JC CLEAN CRUNCH LEAD BLACK PANEL TWEED AMERICAN COMBO BRIT COMBO VINTAGE STACK R-FIER STACK MODERN STACK METAL STACK

VARIATION OFF

This is the sound of the Roland JC-120. This is a crunch sound that can produce natural distortion. This is powerful metal sound with high gain. This models a Fender Twin Reverb. This models a Fender Bassman 4 10" combo. This models a MESA/Boogie combo amp. This models the lead sound of the VOX AC-30TB. This models the sound of Input I on a Marshall 1959. This models a Soldano SLO-100. This models the lead channel of a Peavey EVH5150.
Select the speaker cabinet to best match the amp model youve selected and the actual amp youre using live.
ORIGINAL 4 12'' 4 10'' 2 12'' 1 12'' OFF

Features

Note that speaker cabinet type depends on amp models. This is an optimal speaker cabinet for a large enclosed amp with four 12-inch speakers. This is a distinctive open-back speaker cabinet with four 10-inch speakers. This is a general open-back speaker cabinet with two 12-inch speakers. This is a compact open-back speaker cabinet with one 12-inch speaker. No speaker-cabinet modeling is carried out.
This models the lead channel of a MESA/Boogie Dual Rectifier. This models the rhythm channel of a MESA/Boogie Dual Rectifier.
* The trademarks listed above are trademarks of their respective owners, which are separate companies from Roland and BOSS. Those companies are not affiliated with Roland and BOSS, and have not licensed or authorized the BOSS GP-20 Amp Factory. Their marks are used solely to identify the equipment whose sound is simulated by the BOSS GP-20.

GP-20 REAR PANEL

GP-20 Specifications
q Nominal Input Level 20 dBu q Input Impedance 1 M q Nominal Output Level 20 dBu q Output Impedance 1 k q Recommended Load Impedance 10 k or greater q Dynamic Range 108 dB (IHF-A typ.) q Controls ON/OFF Pedal, MANUAL/MEMORY Pedal, GAIN Knob, BASS Knob, MIDDLE Knob, TREBLE Knob, PRESENCE Knob, MASTER Knob, MODEL Knob, SPEAKER CABINET Knob, VARIATION Button, MEMORY/WRITE Button, OUTPUT Select Switch q Indicators POWER Indicator (serves also as battery check indicator), ON/OFF Indicator, MANUAL Indicator, MEMORY Indicator, VARIATION Indicator q Connectors INPUT Jack, OUTPUT Jack, DIGITAL OUT Jack (RCA PIN type), AC Adaptor Jack q Power DC 9V: Dry battery (AA type) 6, AC Adaptor q Power Consumption 85 mA (9 V max.) (Expected battery life under continuous use; Carbon: 9 hours, Alkaline: 25 hours. These figures will vary depending on the actual conditions of use.) q Dimensions 173 (W) 158 (D) 57 (H) mm, 6-13/16 (W) 6-1/4 (D) 2-1/4 (H) inches q Weight 1.1 kg/2 lbs. 7 oz. (including batteries) q Accessories Owner's Manual, Roland Service (Information sheet), Dry battery (AA type) 6 (We recommend that alkaline batteries be used when replacing the batteries.) * 0 dBu = 0.775 Vrms

EQ-20 REAR PANEL

EQ-20 Specifications
q Memories 9 q Nominal Input Level 20 dBu (GUITAR/BASS), +4 dBu (GUITAR AMP SEND/RETURN) q Input Impedance 1 M q Nominal Output Level 20 dBu (GUITAR/BASS), +4 dBu (GUITAR AMP SEND/RETURN) q Output Impedance 1 k q Recommended Load Impedance 10 k or greater q Residual Noise Level 100 dBu or less (IHF-A typ./All Sliders max.) q Variable Range Equalizer Control: /+15 dB, Level Control: /+15 dB q Display Custom LCD (backlit LCD) q Controls EFFECT ON/OFF Pedal, MANUAL/MEMORY Pedal, Equalizer Sliders (30 Hz, 60 Hz, 120 Hz, 200 Hz, 400 Hz, 800 Hz, 1.6 kHz, 3.2 kHz, 6.4 kHz, 12.8 kHz), LEVEL Slider, SELECT Button, LIGHT Button, LEVEL Switch q Indicators POWER Indicator (serves also as battery check indicator), EFFECT ON/OFF Indicator, MANUAL Indicator, MEMORY Indicator, PEAK Indicator q Connectors INPUT Jack, OUTPUT Jack, AC Adaptor Jack q Power DC 9V: Dry battery (AA type) 6, AC Adaptor q Power Consumption 120 mA (9 V max.) (Expected battery life under continuous use; Carbon: 3.5 hours, Alkaline: 12 hours. These figures will vary depending on the actual conditions of use.) q Dimensions 173 (W) 158 (D) 57 (H) mm, 6-13/16 (W) 6-1/4 (D) 2-1/4 (H) inches q Weight 1.1 kg/2 lbs. 7 oz. (including batteries) q Accessories Owner's Manual, Roland Service (Information sheet), Dry battery (AA type) 6 (We recommend that alkaline batteries be used when replacing the batteries.) * 0 dBu = 0.775 Vrms

RC-20 REAR PANEL

RC-20 Specifications
q Nominal Input Level INPUT: 20 dBu (variable), MIC: 40 dBu (variable), AUX IN: 10 dBu q Input Impedance INPUT: 1 M, MIC: 1 k, AUX IN: 47 k q Nominal Output Level OUTPUT: 20 dBu q Output Impedance 1 k q Recommended Load Impedance 10 k or greater q Internal Memory Recording Time: 5 min. 30 sec. (max.), 10 loop phrases + 1 one-shot phrase (max.) q Controls REC/PLAY/OVERDUB Pedal, STOP/ TAP TEMPO Pedal, INST Knob, MIC Knob, PHRASE SELECT Knob, GUIDE Knob, LEVEL Knob, REVERSE Button, TAP TEMPO Button, WRITE Button, EXIT Button, AUTO START Button, MODE Button q Indicators POWER, REC, PLAY, OVERDUB, PEAK, PHRASE USED, MEMORY FULL, LOOP QUANTIZE, TAP TEMPO, REVERSE, WRITE, EXIT, AUTO START, INST & MIC, NORMAL, CENTER CANCEL, FLAT AMP SIMULATE q Connectors INST Jack, MIC Jack, AUX IN Jack (Stereo miniature phone type), PHRASE SHIFT Jack, REVERSE Jack, OUTPUT Jack q Power DC 9V: Dry battery (AA type) 6, AC Adaptor q Power Consumption 85 mA (9 V max.) (Expected battery life under continuous use; Carbon: 9 hours, Alkaline: 25 hours. These figures will vary depending on the actual conditions of use.) q Dimensions 173 (W) 158 (D) 57 (H) mm, 6-13/16 (W) 6-1/4 (D) 2-1/4 (H) inches q Weight 1.2 kg/ 2 lbs. 7 oz. (including batteries) q Accessories Owner's Manual, Roland Service (Information sheet), Dry battery (AA type) 6 (We recommend that alkaline batteries be used when replacing the batteries.), Sound Library for RC-20 (Sample Phrase CD) * 0 dBu = 0.775 Vrms

OPTIONS

AC Adaptor

(PSA-Series)

Footswitch (Unlatch Type)

Pedal Switch

Once a musical instrument generates sound vibrations, it reaches the human ear through various mediating objects, each of which significantly affects the sound. The material and configuration of the instrument, the electric/electronic/ magnetic amplifying system, the air and the reverberation of the room all affect the final sound. Sound modeling, the latest DSP technology, "virtually" reconstructs these objects. Roland's breakthrough Composite Object Sound Modeling (COSM) uses the advantages of multiple modeling methods and succeeds in accurately emulating existing sounds, as well as producing sounds that have never before been created.
Visit us online at http://www.bosscorp.co.jp/
All specifications and appearances are subject to change. All trademarks used in this catalog are the property of their respective companies.
Printed in Japan Feb. 2001 RAM-3376 ERK-GEN-SE BF-3