Crate Amplifiers CA120D Stereo Amplifier User Manual
Contents
1. Button 2 Button 3 Button 1 Turns Feedback Filter 1 on and off Turns Feedback Filter 2 on and off Togg es between DSP settings 22 23 CA120D Acoustic Amplifier 4 5 7 8B Y UNENE OONO FEEDBACK FILTERS MADE IN THE U S A by SLM ELECTRO DSP A B BANK AUX IN GND EFF RET LIFT LOW Z BAL Co LEVEL HIGH Z BAL HIGH VOLUMES THE U S GOVERNMENT HAS SPECIFIED ACCEPTABLE NOISE EXPOSURE LEVELS REFER TO THESE GUIDELINES FOR ALLOWABLE EXPOSURE TIMES NICS 1400 FERGUSON AVENUE ST LOUIS MO 63133 23 24 25 26 27 28 29 DSP A B Bank Footswitch Connect the three button footswitch to this jack for remote control of two DSP settings 1 With footswitch button 3 s LED illuminated select one of the DSP settings 2 Step on footswitch button 3 the LED will go out select a differ ent DSP setting 3 Step on footswitch button 3 again the LED illuminates and the DSP automatically changes back to the setting chosen in step 1 4 Step on footswitch button 3 again the LED goes out and the DSP automatically changes back to the setting chosen in step 2 Effects Aux In Eff Ret When using an external signal processor or any line level signal drum machine keyboard etc connect the output of the device to this jack by means of a shielded signal cable Effects Send When using an external2. ACOUSTIC CA120D Acoustic Amplifier User s Guide Table of Contents About the Crate Acoustic CA120D The Front Panel ccccccccccsccccceees To Eliminate Instrument Feedback The DSP Section cc cece ccccccsccccceees 3 4 The R at Panels sss20s0sscetdeocsiaceseeetssaceues 6 6 7 System Block Diagram 0 cc cee eee e eens Technical Specifications back cover Manufacturer s Name Production Facility Production Facility Shipping Facility Office Facility Product Type Declaration Of Conformity 33 Effective 01 01 2001 SLM Electronics 1901 Congressional Drive St Louis MO 63146 USA 700 Hwy 202 W Yellville AR 72687 USA 1400 Ferguson Ave St Louis MO 63133 USA 1400 Ferguson Ave St Louis MO 63133 USA Audio Amplifier Complies with the following Standards Safety EMC 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 MOISTURE TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL EN60065 E60065 C22 2 UL6500 and or UL813 Directive 89 336 EEC EN55103 EN55013 EN61000 and or FCC 47CFR 15B clA Supplementary information provided by SLM Electronics R amp D Engineering 1901 Congressional Drive St Louis M
3. finest components Trained craftsmen assemble and cover every cabinet by hand The finished product is tested and played by skilled musicians technicians It is only after the amplifier has passed this meticulous design assembly performance approval process that we allow it to be shipped to our customers The CA120D Acoustic Amplifier Designed to be the best so you can sound your best To get this amplifier to sound its best read this owner s guide prior to its use To keep this amplifier looking its best avoid abrasive cleansers Wipe the cabinet clean using a slightly dampened cloth Never use brass cleaners on the hardware since they could damage their protective coatings 2 MID CONTOUR NOTE Channel 1 and Channel 2 are independent of each other up 10 to the Effects and Master sections The text below 1 10 applies to both channels Low Z The signal from a low impedance microphone may be con nected here by means of a shielded balanced microphone cable ter minated with an XLR connector This jack has 15 volts phantom power applied to pins 2 and 3 Mics not requiring phantom power will not be affected Gain 1 This serves as the input level control for the XLR Input jack 1 For the best signal to noise ratio set this control so the Peak LED 5 flashes on strong signals High Z The signal from your acoustic instrument may be connected here by means of a shielded signal cable This inp
4. FROM DAMAGE DUE TO BEING WALKED ON PINCHED OR STRAINED e ONLY USE ATTACHMENTS ACCESSORIES STANDS OR BRACKETS SPECIFIED BY THE MANUFACTURER FOR SAFE OPERATION AND TO AVOID INJURY UNPLUG THE APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME aN e WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE DO NOT EXPOSE THIS UNIT TO RAIN OR 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 PERMA NENT HEARING IMPAIRMENT OR LOSS USER CAUTION IS ADVISED AND EAR PROTECTION IS RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME EXPLANATION OF GRAPHICAL SYMBOLS DANGEROUS VOLTAGE IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL EXPLICACION DE SIMBOLOS GRAFICOS A VOLTAJE PELIGROSO A ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES EXPLICATION DES SYMBOLES GRAPHIQUES DANGER HAUTE TENSION REFERREZ VOUS AU MANUAL D UTILISATION About the Crate Acoustic CA120D esigned for the performing artist Je CA120D Acoustic Amplifier gives you more of what you want More power More clarity More control And more freedom Imagine microphone quality sound without feedback And without being chained to a mic stand More power a 120 watt RMS power ampli fier drives a Studio Monitor style 12 sub woofer for plenty of
5. O 63146 USA Tel 314 569 0141 Fax 314 569 0175 PRECAUCION ATTENTION RIESGO DE CORRIENTAZO RISQUE D ELECTROCUTION NO ABRA NE PAS OUVRIR PRECAUCION PARA REDUCIR EL RIESGO DE INCENDIOS O DESCARGAS ELECTRICAS NO PER ATTENTION PROTEGEZ CET APPAREIL DE LA PLUIE ET DE L HUMIDITE AFIN D EVITER TOUT MITA QUE ESTE APARATO QUEDE EXPUESTO A LA LLUVIA O LA HUMEDAD PARA DISMINUOIR EL RISQUE D INCENDIE OU D ELECTROCUTION POUR REDUIRE D ELECTROCUTION NE PAS ENLEVER RIESGO DE CORRIENTAZO NO ABRA LA CUBIERTA NO HAY PIEZAS ADENTRO QUE EL USARIO LE COUVERCLE AUCUNE PIECE INTERNE N EST REPRABLE PAR L UTILISATEUR POUR TOUTE PUEDO REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS REPARATION S ADRESSER A UN 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 OPERATION THIS UNIT REQUIRES 3 75CM 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
6. ds This almost always means the musician must sacrifice sound quality in his quest to do away with feedback But since Crate s feedback elimination circuit isolates only the offending frequency instrument feedback from the CA120D can be eliminated without affecting the overall sound The DSP Section The CA120D features Crate s On Board Digital Signal Processing DSP technology that was designed specifically for use with acoustic instruments and vocals This provides a large selection of digital reverbs effects and delays Select the type of effect desired by rotating the Mode control 15 The effects are described below When a footswitch is used in the DSP A B Back Footswitch jack 23 a separate DSP setting can be stored and recalled for each of the footswitch s two button positions LED on LED off Refer to the steps on page 5 item 23 CA120D Acoustic Amplifier If you experience feedback while playing depress the Feedback Filters On switch This actives the automatic feedback control circuit Depress the Feedback Filter 1 switch to isolate and control the offending frequency If feedback occurs again while the Filter 1 switch is depressed depress the Filter 2 switch to isolate and control the second offending frequency The LEDs above the switches illuminate when the switches are depressed When a footswitch is used in the Feetback Filters Footswitch jack 22 the ON LED illuminates when the plug is inserted into th
7. e jack and the front panel switches are rendered inoperative CEFFECTS gt DELAY 11 L2 om REVIDLY om M AA L1 A y D o CH3 N l DBLR MULTI DSP MODE LEVEL EFF RET The following chart provides a list of the DSP settings along with a brief description of each effect Reverb R average room reverb S small dark hall reverb M medium hall reverb L large hall reverb Delay S 100 milisecond delay M 200 milisecond delay L1 335 milisecond delay L2 500 milisecond delay Rev Dly M_ reverb with 250 milisecond delay L1 reverb with 400 milisecond delay L2 reverb with 550 milisecond delay Multi Ch1 chorus effect Ch2 chorus 375 milisecond delay reverb Ch3 425 milisecond delay with chorus reverb Dblr adds second signal slightly out of sync with original Bypass effects off J phantom power effects o soro o P g line out mi level fot switc aux in P P eff ret E k i cd gt ell re input pul a gain E high pass i feedback Z K ae filters 1 on off low pass g 1 ow ireq tweeter ae foot e a cut switch Ma ner M external speaker NOTE Feedback circuit activated when footswitch plug is inserted into Feedback Filters Footswitch jack Technical Specifications Output Power Rating Channels 1 amp 2 Low Mid High Input Impedance Input Sensitivity Sens to Eff Send Line out Max Input S
8. ignal CD Input Input Impedance Input Sensitivity Max Input Signal AuxEff Return Input Impedance Input Sensitivity Max Input Signal Eff Send Out Impedance Line Out Out Impedance Feedback Filters Internal Woofer Internal Tweeter Internal Crossover Power Requirements Size and Weight CA120D Acoustic Amplifier 120 watts lt 1 THD 15dB 80Hz 15 30dBdB from 450Hz 1 2kHz Contour 15dB 10kHz 3 3M ohm High Z 3k ohm Low Z smV High Z 2mV Low Z 6mV High Z 3mV Low Z 6V RMS 17V peak to peak 22k ohm 150mV 6V RMS 17V peak to peak 11k ohm 80mV RMS 6V RMS 17V peak to peak 2 2k ohm 220 ohm Low Z 2 2k ohm High Z 10Hz to 4 8kHz range 15dB cut per filter 12 w polypropylene cone rubber surround 450z magnet 2 voice coil 4 ohms 175w RMS 95dB 1w 1m High efficiency Piezo 110dB 1w 1m Passive type 120VAC 60Hz 160VA 100 115VAC 50 60Hz 160VA 230VAC 50 60Hz 160VA 18 H x 17 1 2 W x 15 1 2 D 45 Ibs www crateamps com 2004 SLM Electronics A Division of St Louis Music Co 1400 Ferguson Avenue St Louis MO 63133 47 942 01 021604
9. r Panel 19 20 21 22 19 20 CRATE CAleoD 120 WATTS EXTERNAL SPEAKER Q Q Power Use this switch to turn the amplifier on top of the switch depressed and off bottom of the switch depressed The power switch illuminates when the amplifier is on AC Line Cord The grounded power cord should only be plugged into a grounded power outlet that meets all applicable 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 External Speaker Use this jack to connect the amplifier to an external speaker cabinet This jack is wired in series with the internal speakers which remain active when an external speaker is connected Feedback Filters Footswitch Connect the three button footswitch to this jack for remote control of the feedback filters The Feedback Filters ON LED 14 front panel illuminates and the feedback circuit is activated when a footswitch is connected to this jack Footswitch button 1 controls Feedback Filter 1 button 2 controls Filter 2 See illustration below Note This is a STEREO jack tip Filter 1 ring Filter 2 sleeve is ground Use only a footswitch equipped with a stereo 1 4 plug CA120D Rear Panel NOTE The Feedback 0 circuit is activated when a footswitch is plugged into the Feedback Filters Footswitch jack gt FOOTSWITCH
10. sP EFF IE DSP EN __MODE LEVEL 15 16 17 18 The Master Section part one 11 12 13 14 CD Input Use these RCA jacks to connect a CD or tape player to the amplifier Use the CD Level control 12 to adjust the level of the player CD Level Use this control to adjust the signal level at the CD Input jacks 11 Tweeter Cut Use this control to reduce the output level of the inter nal high frequency driver In the fully counter clockwise position the tweeter is at its full output level As you rotate the control clockwise the tweeter level decreases Adjust this control to best suit your play ing environment Feedback Filters Use these switches to activate the CA120D s advanced feedback elimination circuitry For complete details see the section entitled To Eliminate Feedback on page 6 The Effects Section 15 16 v Mode Use this control to select the type of Digital Signal Processing effect applied to the output signal For a listing of the effects please see the section entitled The DSP Section on page 6 DSP Level Use this control to adjust the amount of internal DSP effect Aux In Eff Ret Use this control to adjust the mix of the line level signal applied to the Effects Aux In Eff Ret jack 24 page 5 with the main input signal The Master Section part two 18 Level Use this control to set the overall output level of the amplifier CRATE ACOUSTIC The Rea
11. signal processor connect this jack to the input of the effect by means of a shielded signal cable Line Out Level Use this control to adjust the output level of the line out signal This control works independently from the amplifier s master level control High Z Bal Line Out Use this jack to connect a high impedance line level signal to a house sound board a recording console or an exter nal power amplifier by means of an 1 4 stereo plug terminated cable Ring is signal tip is signal and sleeve is ground Gnd Lift This switch when depressed electronically disconnects both of the Line Out jacks 27 29 chassis ground connections If you experience excessive noise when using the Line Out jacks depress this switch Low Z Bal Line Out Use this jack to connect a low impedance line level signal to a house sound board a recording console or an exter nal power amplifier by means of an XLR terminated cable Pin 1 is ground pin 2 is signal and pin 3 is signal To Eliminate Instrument Feedback One of the most common problems encountered when amplifying acoustic instruments especially in small environments is feedback Acoustic instruments typically have inherent qualities which cause reso nant feedback at specific frequencies Instrument tone controls and sound board equalizers are helpful in getting rid of the problem but they typi cally operate around relatively wide frequency ban
12. ut will accommo date a piezo pickup or an active system Gain 2 This serves as the input level control for the High Z jack 3 For the best signal to noise ratio set this control so the Peak LED 5 flashes on strong signals Peak This LED flashes when the signal level into the preamp approaches clipping Adjust the Gain controls 2 4 until a strong signal causes this LED to flash Low This serves as the bass control Adjust this control to get the best sounding bass response for this channel Excessive boost of the low control can cause an unnatural howling and should be avoided Mid This serves as the midrange control Adjust this control to get the best projection and midrange tones for your instrument The cen ter point of the mid control is chosen by the setting of the Contour control 8 Contour Use this control to set the center point of the Mid control 7 Set this control at the frequency which gives you the most natu ral sounding midrange tones High This serves as the treble control Adjust this control so your high notes and harmonic overtones are lively but not overpowering DSP Eff Send Use this control to adjust the amount of internal Digital Effect and or external effect if used 3 500Hz MID CONT HIGH CA120D Acoustic Amplifier 10 1 12 13 14 FEEDBACK FILTERS 7 ON 1 2 J E E E CEFFECTS gt aH yw REIDLY OA cS r E fe ey s hoa A f ry 1 pair vr WULT 0 D
13. volume and low end punch More clarity a specially designed tweeter provides clean crisp highs and natural mid range blend A tweeter level control allows you to adjust the high frequency output to suit your taste More control two separate channels each with its own gain tone and reverb effects controls An automatic feedback elimination circuit with two filter select controls lets you kill feedback without sacrificing sound quali ty The filters can be controlled by means of a footswitch provided with the unit A pair of CD Input jacks allows you to play along with a compact disc cassette tape or a rhythm machine Still more Footswitch jacks on the rear panel provide control for the feedback circuit as well as two tracking DSP presets Level controllable XLR and 1 4 balanced line outs allow you to patch into house sound boards or recording consoles plus an effects loop line in line out setup allows connection of external effects An external speaker jack lets you connect the amplifier to another separate speaker cabinet j CA120D Acoustic Amplifier Enough already Not for us The CA120D features Crate s Digital Signal Processing DSP for a variety of digital reverbs effects and delays specifically designed for acoustic instruments The CA120D was designed evaluated and tweaked by music loving engineers Each amplifier is produced by skilled assemblers using sophisticated assembly machines and the
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