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Crate Amplifiers bt25/bt50 Speaker System User Manual

1. 125 150 BASS AMPLIFIER Tha i Ee ee Se es eee 8 USER S GUIDE ct 125 150 Bass Amplifier Table Of Contents MOCO ay ds ft aces ae Geeta Geshe a eat 3 The Front Paneb eke eh 4 5 Some Suggested Settings 6 System Block Diagram 7 Technical Specifications back cover CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOIS TURE EUER NOS SHOCK DO NOT PRECAUCION RIESGO DE CORRIENTAZO NO ABRA PRECAUCION PARA REDUCIR EL aay DE INCENDIOS DESCARGAS ELECTRICAS NO PERMITA QUE ESTE APARATO QUEDE EXPUESTO A LA LLUVIA O LA HUMEDAD PARA DISMINUOIR EL DE CORRIENTAZO RISQUE D ELECTROCUTION NE PAS OUVRIR ATTENTION PROT GEZ CET APPAREIL DE LA PLUIE ET DE L HUMIDIT AFIN D VITER TOUT RISQUE D INCENDIE OU D LECTROCUTION POUR REDUIRE D ELECTROCUTION NE PAS ENLEVER LE COUVERCLE AUCUNE VICEABLE PARTS INSIDE REMOVE COVE R SER NO ABRA LA CUBIERTA NO HAY PIEZAS ADENTRO QUE EL USARIO PUEDO REFER SERVICING 16 QUALIFIED SERVICE PERSONNEL REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS PIECE INTERNE N EST REPRABLE PAR L UTILISATEUR POUR TOUTE REPARATION S ADRESSER UN TECHNICIEN QUALIFIE IMPORTANT SAFETY INSTRU
2. With the switch in the out position the Clean channel is selected When the switch is depressed the Distortion channel is selected The adjacent LED illu minates when the Distortion channel is selected NOTE When using a footswitch when this switch is depressed the footswitch switches between the Distortion channel and the Clean channel when this button is in the out position the Clean channel is always active and the footswitch turns the Distortion channel on and off allowing you a blend of both channels 6 LEVEL Use this control to adjust the output level of the Clean channel and as part of the Octave level con trol see 11 NOTE The BT25 BT50 employs an internal noise gate to keep residual noise to a minimum Regaraless of which channel is selected the Clean channel s Level control 6 must be turned up above 0 in order for the noise gate to trigger 7 LOW Use this control to adjust the low frequency output of the Clean channel 8 LOW MID Use this control to adjust the lower midrange frequency output of the Clean channel 9 HIGH MID Use this control to adjust the upper midrange frequency output of the Clean channel 10 HIGH Use this control to adjust the high frequency output of the Clean channel 11 OCTAVE The BT25 BT50 features internal circuitry which creates a second signal which is one octave lower than the input signal Use this control in conjunction with the Clean channel s Level control 6 to adjust
3. uggested Starting Settings JR LU CY Y AY kd kd ok Li iy NS LOW LOW vm Sw 1 ae e Low LOW LOW LOW 25 50 Bass Amplifier CLEAN LO MID HIMID HIGH CLEAN LO MID HIMID HIGH P l2 12 CLEAN LO MID HIMID HIGH LL LL LL n CLEAN MID HI MIID HIGH CL AN LO MID HI MIID HIGH CLEAN MID HIMID HIGH vm 10 oO 9 5 NES r ah ee 990699 n is ako hak de LA MASTER OCTAVE MASTER LL LL LL LL OOOO de lt LL LL Jo LL GCS GE hl hol hol 5 9 MASTER OCTAVE MASTER MASTER OCTAVE MASTER oh oe ly eoo 5 5 MASTER OCTAVE MASTER ah LL oly a 1 LL e hd ih 246 eo 4 kd MASTER OCTAVE MASTER oy GO i d MASTER OCTAVE MASTER LL LL LL WP lt As Needed B 1 25 750 Bass Amplifier System Block Diagram OCTAVE LEVEL TUNER FOOT SWITCH BUFFER wp gt _ gt LES i QI o LEVEL CHANNEL LOW LOW HIGH HIGH e DISTORTION SHARE LEVEL GAIN POWER AMP 2 EXTERNAL SPEAK
4. CTIONS READ FOLLOW HEED AND KEEP ALL INSTRUCTIONS AND WARNINGS DO NOT OPERATE NEAR ANY HEAT SOURCE AND DO NOT BLOCK ANY VENTILATION OPENINGS ON THIS APPARATUS FOR PROPER OPERATION THIS UNIT REQUIRES 3 75mm OF WELL VENTILATED SPACE AROUND HEATSINKS AND OTHER AIR FLOW PROVISIONS IN THE CABINET DO NOT USE THIS APPARATUS NEAR SPLASHING FALLING SPRAYING OR STANDING LIQUIDS CLEAN ONLY WITH LINT FREE DAMP CLOTH AND DO NOT USE CLEANING AGENTS 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 PROTECT THE 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 ONLY USE ATTACHMENTS ACCESSORIES STANDS OR BRACKETS SPECIFIED BY THE MANUFACTURER FOR SAFE OPERATION AND TO AVOID INJURY AS WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE SERVICE MUST BE PERFORMED BY QUALIFIED PERSONNEL 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 1 OPERATED AT HIGH VOLUME EXPLANATION OF GRAPHICAL SYMBOLS EXPLICACION DE SIMBOLOS GRAFICOS EXPLICATION DES SYMBOLES G
5. ER MASTER sPeaKer EUR ATTENUATOR 2 HEAD PHONES BT25 BT50 Technical Specifications Output Power Rating Gain Distortion Channel Clean Channel CD Inputs Tone Range Low Lo Mid Hi Mid High Signal to Noise Ratio Input Impedance Maximum Signal Accepted Input Power Requirements Internal Speaker Size Type Magnet Voice Coil RMS Rating Impedance Size Weight BT25 BT50 Bass Amplifier BT25 BT50 25W RMS 2 THD 40 120 VAC 50W RMS 2 THD 40 120 VAC 100dB 104dB 60dB 63 33dB 370B 21dB 50Hz 21dB 50Hz 23dB 150Hz 23dB 150Hz 18dB 1kHz 18dB 1kHz 34dB 10kHz 34dB 10kHz 75dB 75dB 220k ohms 220k ohms 15 volts peak to peak 120 VAC 60Hz 45VA 100 115VAC 50 60 2 45VA 230VAC 50 60Hz 45VA 10 Crate Custom 30 07 4 30 watts 4 ohms 19 H x 18 W x 12 1 2 D 37 6 15 volts peak to peak 120 VAC 60Hz 85VA 100 115VAC 50 60Hz 85VA 230VAC 50 60Hz 85VA 12 Crate Custom 30 07 1 5 50 watts 8 ohms 21 18 W x 14 D 46 lbs Specifications subject to change without notice www crateamps com 2003 ST LOUIS MUSIC 1400 FERGUSON ST LOUIS MO 63133 47 376 01 012904
6. RAPHIQUES 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 A 8 7 25 I 50 Bass Amplifier Congratulations You are now the proud owner of the compact but powerful Crate 25 50 Bass Amplifier The BT25 BT50 features two different chan nels distortion channel featuring Crate s exclusive Shape control for quick and easy access to the tone you need and a clean channel with a four band rotary EQ Another unique and valuable feature of this amplifier is the Octave control This feature electronically creates a sec ond signal that is one octave lower than the original signal An active electronic tuner conveniently located on top of the amplifier allows you to get in tune and stay in tune on the fly Front panel jacks are provid ed for connecting a CD player and a pair of headphones thereby opti mizing your practice time Like all Crate products your BT25 BT50 is designed by musicians and built 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 bass amp we urge you to check out the information in this manual before you begin playing And thank y
7. electrical codes and is compatible with the voltage power and frequency requirements stated on the rear panel Do not attempt to defeat the safety ground connection 18 FOOTSWITCH Connect a two button footswitch such as the Crate CFP 2 here for remote control of the channel selection olend see 5 and octave on off When the Channel Switch 5 is depressed the footswitch switches between the Clean channel and the Distortion channel when the switch is in the out posi tion the Clean channel is always active and the footswitch turns the Distortion channel on and off allowing you a blend of both channels 19 EXTERNAL SPEAKER Use this jack to connect the amplifier to an external speaker cabinet BT25 4 ohms minimum 50 8 ohms minimum The internal speaker is disconnected when the external speaker jack is used TUNING INDICATORS FLAT NOTE STRING INDICATORS 5 5 DISTORTION GAIN SHAPE LEVEL LEVEL DISTORTION mm CLEAN Jazz DISTORTION GAIN SHAPE LEVEL ee Ve vere ve o E DISTORTION CL AN LEVEL DISTORTION GAIN SHAPE LEVEL LewveL DISTORTION CL AN Funk DISTORTION GAIN SHAPE LEVEL A V n DISTORTION m CLEAN Solo Fuzz DISTORTION GAIN SHAPE LEVEL Lever DISTORTION m CLEAN Super Fat Fuzz DISTORTION GAIN SHAPE LEVEL A V oh vam aly GSO DISTORTION mm CLEAN EL
8. ou for choosing Crate Declaration Of Conformity 28 Effective 01 01 2001 Manufacturer s Name SLM Electronics Production Facility 1901 Congressional Drive St Louis MO 63146 USA Production Facility 700 Hwy 202 W Yellville AR 72687 USA Shipping Facility 1400 Ferguson Ave St Louis MO 63133 USA Office Facility 1400 Ferguson Ave St Louis MO 63133 USA Product Type Audio Amplifier Complies with the following Standards Safety EN60065 E60065 C22 2 UL6500 and or UL813 EMC Directive 89 336 EEC EN55103 EN55013 EN61000 and or 47CFR 15B Supplementary information provided by SLM Electronics amp D Engineering 1901 Congressional Drive St Louis MO 63146 USA Tel 314 569 0141 Fax 314 569 0175 25 50 Bass Amplifier The Front Panel DISTORTION CLEAN GAIN SHAPE LEVEL LO MID WATTS DISTORTION mm 1 INPUT Use this 1 4 jack to connect your bass to the amplifier by means of a shielded instrument cable 2 GAIN Use this control to adjust the amount of distortion for the Distortion channel As you rotate the control clockwise the amount of distortion increases 3 SHAPE Use this control to adjust the tone of the Distortion channel from a studio V shaped tone to a more live more present sound 4 LEVEL Use this control to adjust the output level of the Distortion channel 5 CHANNEL SWITCH Use this switch to select either channel
9. the level of the octave signal 12 MASTER Use this control to adjust the overall output level of the amplifier 4 25 50 Bass Amplifier MASTER HI MID HIGH OCTAVE MASTER 13 CD Use these RCA jacks to connect the line level or headphones output of a CD player tape deck or rhythm machine to the amplifier The signal level from these jacks is adjusted by the Master control 12 If the signal from the source connected to these jacks 1 too strong use the output level control on the source to adjust the signal to obtain the proper level for a good mix 14 HEADPHONES Use this jack to listen to the amplifier through a pair of stereo headphones The internal speaker is disconnected when the headphones jack is used CAUTION To avoid possible damage to your hearing do not use head phones for extended periods of time at extremely loud listening levels 15 POWER Use this switch to turn the amplifier on and off The adjacent LED illuminates when the amplifi er is turned on 16 ELECTRONIC TUNER top panel This active electronic tuner is on whenever the amplifier is turned on allowing you constant real time tuning The tuner is fully chromatic use the flat and sharp indicators until the LED between them illuminates indicating proper tuning The Rear Panel not shown 17 AC LINE CORD The grounded power cord should only be plugged into a grounded power outlet that meets all applicable

Crate Amplifiers bt25/bt50 Speaker System User Manual

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