Crate Amplifiers GFX-20 User's Manual
Contents
1. GFX cU EDITAR AMPLIFIER WITH DIGITAL SIGNAL PROCESSING d I OWNER S MANUAL Congratulations You are now the proud owner of the Crate GFX 20 guitar amplifier This small but versatile amplifier features two separate channels one crystal clear and the other with our patented Flex Wave distortion combined with a three band EQ and an easy to operate DSP section which lets you dial in a variety of digital effects such as delay flange chorus and reverb A special damping circuit simulates the current source type output of a tube amp giving you solid state reliability combined with classic tube sounds Your GFX 20 is Musician Made in the U S A using only the best components Extensive testing at the hands and ears of skilled technicians and musicians insures you that this amplifier is the absolute best it can be In order to get the most out of your new amplifier we strongly urge you to go over the information contained in this manual before you begin playing And thank you for choosing CRATE CRATE Amplifier OVERORIVE a CLEAN mr EQUALIZATION 10 U OVERDRIVE LEVEL 1 2 3 1 INPUT Connect your guitar here using a shielded instrument cable OVERDRIVE CHANNEL A high gain chan nel giving you sounds from a slight edge to serious overdrive 2 GAIN This control sets the amount of compression and distortion from the amplifi er With the control towards far left t2. 46dB 6dB 1kHz 25dB 80Hz 19dB Y 900Hz 23dB 5kHz gt 500B gt 650B gt 1 2 volts RMS min 400Hz 10 Crate Custom Design 4 ohm 120 VAC 60Hz 20VA 100 115VAC 50 60Hz 20VA 230VAC 50 60Hz 20VA 15 H x 16 75 W x 9 5 D 21 Ibs 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 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 10 BERS Aue ee OF ine SHOCK DO NOT REMOVE COVE R SERVICEABLE PARTS INSIDE REFER SERVICING 10 QUALIFIED SERVICE PERSONNEL PRECAUCION ATTENTION RIESGO DE CORRIENTAZO RISQUE D ELECTROCUTION NO ABRA NE PAS OUVRIR PRECAUCION PARA aed EL RIESGO DE INCENDIOS O DESCARGAS ELECTRICAS NO PERMITA QUE ESTE APARATO QUEDE EXPUESTO A LA LLUVIA O LA HUMEDAD PARA DISMINUOIR EL E DE CORRIENTAZO NO ABRA LA CUBIERTA NO HAY PIEZAS ADENTRO QUE EL USARIO PUEDO REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS ATTENTION PROTEGEZ CET APPAREIL DE LA PLUIE ET DE L HUMIDIT E REPARATION S ADRESSER if TECHNICIEN QUALIFIE IMPORTANT SAFETY INSTRUCTIONS READ FOLLOW HEED AND KEEP ALL INSTRUCTIONS AND WARNINGS e DO NOT OPERATE NEAR ANY HEAT SOURCE AND DO NOT BLOCK ANY VENTILATION OPENINGS ON THIS APPARATUS FOR PROPER OPERATI
3. ICACION DE SIMBOLOS GRAFICOS EXPLICATION DES SYMB LES GRAPHIQUES 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 DANGEROUS VOLTAGE VOLTAJE PELIGROSO DANGER HAUTE TENSION CRATE www crateamps com ay LA C 1998 SLM ELECTRONICS A DIVISION OF ST LOUIS MUSIC 1400 FERGUSON ST LOUIS MO 63133 er P N 47 452 01 03 02
4. ON THIS UNIT REQUIRES 3 75mm OF WELL VENTILATED SPACE AROUND HEATSINKS AND OTHER AIR FLOW PROVISIONS IN THE CABINET e DO NOT USE THIS APPARATUS NEAR SPLASHING FALLING SPRAYING OR STANDING LIQUIDS e CLEAN ONLY WITH LINT FREE DAMP CLOTH AND DO NOT USE CLEANING AGENTS e ONLY CONNECT POWER CORD TO A POLARIZED SAFETY GROUNDED OUTLET WIRED TO CURRENT ELECTRICAL CODES AND COMPATIBLE WITH VOLTAGE POWER AND FREQUENCY REQUIREMENTS STATED ON THE REAR PANEL OF THE APPARATUS e PROTECT THE POWER CORD FROM DAMAGE DUE TO BEING WALKED ON PINCHED OR STRAINED e UNPLUG THE APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME e ONLY USE ATTACHMENTS ACCESSORIES STANDS OR BRACKETS SPECIFIED BY THE MANUFACTURER FOR SAFE OPERA TION AND TO AVOID INJURY e THIS APPARATUS DOES NOT OPERATE NORMALLY AND REQUIRES SERVICE WITH ANY PHYSICAL DAMAGE FROM IMPACT OR ANY EXPOSURE TO MOISTURE e SERVICE MUST BE PERFORMED BY QUALIFIED PERSONNEL e OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS CONTINUED EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS USER CAUTION IS ADVISED AND EAR PRO TECTION IS RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME 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 EXPLANATION OF GRAPHICAL SYMBOLS EXPL
5. he sound will have a thick compressed quality As you turn the control to the right the amount of distortion increases Crate s exclusive Flex Wave circuitry uses sequen tial cascading gains to deliver distortion which is rich in harmonics and touch sensi tive Use this control along with the Level 3 to create a wide variety of sounds 3 LEVEL This control sets the output vol ume level from the Overdrive channel in the far left position there will be no output as you turn the control to the right the output increases Use this control along with the Gain control 2 to create a wide variety of sounds 4 OVERDRIVE SELECT When this push button switch is pressed in the Overdrive channel is engaged The clean channel is selected when this switch is out CLEAN CHANNEL A normal gain channel designed to give you crystal clear sounds to medium distortion 4 LEVEL 5 LEVEL This control sets the output vol ume level from the Clean channel in the far left position there will be no output as you turn the control to the right the output level increases The far right setting is maximum output as you increase the level roll back the Low control 6 EQUALIZATION 6 LOW Adjust the low frequency output level with this control turning the control to the left reduces the low frequency output turning it to the right increases the low fre quency output The Low control allows a total range of 25dB of bo
6. n nect the GFX 20 to an external speaker with a rated impedance of at least 4 ohms using this jack The internal speaker is disconnect ed whenever an external speaker is used s HEADPHONES SPEAKER 12 ON LED The word ON will glow when you turn on the GFX 20 showing you that the amplifier is activated and ready to play 13 POWER This heavy duty rocker type switch is used to turn the amplifier ON in the left position off in the right position The ON LED 12 works with this switch as a visual indicator 14 POWER CORD Rear panel not shown This heavy duty grounded three wire power cord is to be plugged into ONLY a safely wired grounded 120 volt 60 cycle AC power outlet DO NOT attempt to defeat the ground connection of this cable If your GFX 20 was purchased outside the United States see the unit s rear panel for its power rating and follow the above guidelines WARNING DO NOT attempt to use headphones in the Speaker jack Permanent hearing damage could result TE GFX 20 Amplifier GFX 20 TECHNICAL SPECIFICATIONS Output Power Rating Gain Overdrive Channel Gain Clean Channel Tone Control Range Low Tone Control Range Mid Tone Control Range High Signal To Noise Overdrive Channel Signal To Noise Clean Channel Maximum Signal Accepted Internal Speaker Input Power Requirements Size and Weight gt 20 watts RMS 5 THD 4 ohms 120VAC 86dB 6dB 1kHz
7. ost or cut at 80Hz Due to the massive amount of low end avail able you may want to roll off the bass at high volumes 7 MID Adjust the mid frequency output level with this control the center position is flat no boost or cut Turning the control to the left reduces the midrange output turning it to the right increases the midrange output The Mid control allows for 19dB of boost or cut at 900Hz 8 HIGH Adjust the high frequency output level with this control in the center position the high frequency output will be flat no boost or cut Turning the control to the left reduces the high frequency output turning it to the right increases the high frequency out put The High control allows a total range of 23dB of boost or cut at 5KHz CRATE Amplifier BYPASS REV 2 a D MODE 10 9 DSP MODE Select the type of digital effect s desired with this control Each cat egory and its central location is called out delay flange etc by the markings around the control with variations as follows Bypass DSP off e Slapback delay e Long delay w regeneration e Flange Slow Chorus Fast Chorus e Chorus w small room reverb e Small room reverb e Large room reverb 10 HEADPHONES For private practice sessions plug a pair of stereo headphones into this jack The internal speaker is discon nected whenever headphones are being used 11 EXTERNAL SPEAKER You may co
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