www.crateamps.com
©1998 SLM ELECTRONICS, ADIVISION OF ST. LOUIS MUSIC, 1400 FERGUSON, ST. LOUIS, MO. 63133
P/N 47-452-01 • 03/02
GFX-20 Amplifier
Crate continually develops new products, as well as improves existing ones. For this reason, the
specifications and information in this Crate manual are subject to change without notice.

Output Power Rating >20 watts RMS @ 5% THD 4 ohms, 120VAC

Gain, Overdrive Channel 86dB +/-6dB @ 1kHz

Gain, Clean Channel 46dB +/-6dB @ 1kHz

Tone Control Range, Low 25dB @ 80Hz

Tone Control Range, Mid 19dB @ 900Hz

Tone Control Range, High 23dB@ 5kHz

Signal To Noise, Overdrive Channel >50dB

Signal To Noise, Clean Channel >65dB

Maximum Signal Accepted >1.2 volts RMS min. @ 400Hz

Internal Speaker 10” Crate Custom Design 4 ohm

Input Power Requirements 120 VAC, 60Hz, 20VA

100/115VAC, 50/60Hz, 20VA

230VAC, 50/60Hz, 20VA

Size and Weight: 15” H x 16.75” W x 9.5” D, 21 lbs.

The GFX-20 is covered with a durable black Tolex material: wipe it clean with a lint-free cloth. Never
spray cleaning agents onto the cabinet. Avoid abrasive cleansers which could damage the finish.

GFX-20 TECHNICAL SPECIFICATIONS

IMPORTANTSAFETY INSTRUCTIONS

•READ, FOLLOW, HEED, AND KEEPALL INSTRUCTIONS AND WARNINGS.
•DO NOTOPERATE NEAR ANY HEATSOURCE AND DO NOTBLOCK ANY VENTILATION OPENINGS ON THIS APPARATUS. FOR
PROPER OPERATION, THIS UNITREQUIRES 3” (75mm) OF WELL VENTILATED SPACE AROUND HEATSINKS AND OTHER AIR
FLOW PROVISIONS IN THE CABINET.
•DO NOTUSE THIS APPARATUS NEAR SPLASHING, FALLING, SPRAYING, OR STANDING LIQUIDS.
���CLEAN ONLYWITH LINT-FREE DAMP CLOTH AND DO NOTUSE CLEANING AGENTS.
•ONLYCONNECT POWER CORD TO APOLARIZED, SAFETYGROUNDED OUTLET WIRED TO CURRENTELECTRICAL CODES AND
COMPATIBLE WITH VOLTAGE, POWER, AND FREQUENCYREQUIREMENTS STATED ON THE REAR PANELOF THE APPARATUS.
•PROTECTTHE POWER CORD FROM DAMAGE DUE TO BEING WALKED ON, PINCHED, OR STRAINED.
•UNPLUG THE APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME.
•ONLYUSE ATTACHMENTS, ACCESSORIES, STANDS, OR BRACKETS SPECIFIED BYTHE MANUFACTURER FOR SAFE OPERA-
TION AND TO AVOID INJURY.
•THIS APPARATUS DOES NOTOPERATE NORMALLYAND REQUIRES SERVICE WITH ANY PHYSICALDAMAGE FROM IMPACTOR
ANYEXPOSURE TO MOISTURE.
•SERVICE MUSTBE PERFORMED BY QUALIFIED PERSONNEL.
•OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO HIGH SOUND
PRESSURE LEVELS CAN CAUSE PERMANENTHEARING IMPAIRMENT OR LOSS. USER CAUTION IS ADVISED AND EAR PRO-
TECTION IS RECOMMENDED IF UNITIS OPERATED AT HIGH VOLUME.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOIS-
TURE. TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
"IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL"
“ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES.”
"REFERREZ-VOUS AU MANUAL D'UTILISATION"
EXPLANATION OF GRAPHICAL SYMBOLS:
EXPLICACION DE SIMBOLOS GRAFICOS:
EXPLICATIONDES SYMBÔLES GRAPHIQUES:
"DANGEROUS VOLTAGE"
“VOLTAJE PELIGROSO”
"DANGER HAUTE TENSION"
==
PRECAUCION
RIESGO DE CORRIENTAZO
NO ABRA
PRECAUCION: PARA REDUCIR EL RIESGO DE INCENDIOS O DESCARGAS
ELECTRICAS, NO PERMITA QUE ESTE APARATO QUEDE EXPUESTO A LA
LLUVIA O LA HUMEDAD. PARA DISMINUOIR EL RIESGO DE CORRIENTAZO.
NO ABRA LA CUBIERTA. NO HAY PIEZAS ADENTRO QUE EL USARIO PUEDO
REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS.
ATTENTION
RISQUE D'ELECTROCUTION
NE PAS OUVRIR
ATTENTION: PROTÉGEZ CET APPAREIL DE LA PLUIE ET DE L'HUMIDITÉ
AFIN D'ÉVITER TOUT RISQUE D'INCENDIE OU D'ÉLECTROCUTION. POUR
REDUIRE D'ELECTROCUTION NE PAS ENLEVER LE COUVERCLE. AUCUNE
PIECE INTERNE N'EST REPRABLE PAR L'UTILISATEUR. POUR TOUTE
REPARATION, S'ADRESSER A UN TECHNICIEN QUALIFIE.