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Power-Tech .1 Series
Power-Tech 1.1
Operation Manual
Power-Tech 2.1
Power-Tech 3.1
Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during
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Power-Tech .1 Series Power Amplifiers Important Safety Instructions 1) Read these instructions. TO PREVENT ELECTRIC SHOCK DO NOT REMOVE 2) Keep these instructions. TOP OR BOTTOM COVERS. NO USER SERVICE- 3) Heed all warnings. ABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. 4) Follow all instructions. 5) Do not use this apparatus near water. À PRÉVENIR LE CHOC ÉLECTRIQUE N’ENLEVEZ 6) Clean only with a dry cloth. PAS LES COUVERCLES. IL N’Y A PAS DES PAR- 7) Do not block any
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Power-Tech .1 Series Power Amplifiers Table of Contents 5 Advanced Features and Options ......................................... 13 Important Safety Instructions .............................................. 2 Table of Contents ................................................................. 3 5.1 Protection Systems .................................................... 13 5.1.1. ODEP ................................................................. 13 1 Welcome ...
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Power-Tech .1 Series Power Amplifiers 1 Welcome 2 How to Use This • Safe with any load. Bridge-Mono and Parallel-Mono modes make it easy to opti- Manual Congratulations on purchasing a Crown mize the amplifier’s performance for a wide Power-Tech™.1 Series amplifier. Power-Tech .1 range of loads. This manual provides you with the necessary Series amplifiers are compact, professional information to safely and correctly set up and • Complete protection against shorted out- power amplifiers e
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Power-Tech .1 Series Power Amplifiers 3 Setup 3.1 Unpack Your Amplifier 3.2 Install Your Amplifier 3.3 Ensure Proper Cooling When using an equipment rack, mount units Please unpack and inspect your amplifier for CAUTION: Before you begin, make sure any damage that may have occurred during your amplifier is disconnected from the directly on top of each other. Close any open spaces in rack with blank panels. DO NOT transit. If damage is found, notify the transpor- power source, with power swit
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Power-Tech .1 Series Power Amplifiers 3 Setup 3.4 Choose Input Wire and Connectors Crown recommends using pre-built or profes- sionally wired, balanced line (two-conductor plus shield), 22-24 gauge cables and connec- tors. If you chose the MT-BB input barrier strip option, use bare wire or spade lugs at the ampli- fier inputs. Otherwise use either 3-pin male XLR connectors or TRS ¼-inch phone connectors. Figure 3.3 shows connector pin assignments for balanced wiring, and Figure 3.4 shows
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Power-Tech .1 Series Power Amplifiers 3 Setup 3.5 Choose Output Wire and Con- nectors Crown recommends using pre-built or profes- sionally wired, high-quality, two-conductor, heavy gauge speaker wire. Use bare wire, a dual banana plug or spade lugs on the amplifier end of each speaker cable (Figure 3.5). To prevent the possibility of short-circuits, wrap or other- wise insulate exposed loudspeaker cable con- nectors. Using the guidelines below, select the appropri- ate size of wire based on
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Power-Tech .1 Series Power Amplifiers 3 Setup 3.6 Wire Your System 3.6.3 Parallel-Mono Mode Turn down the Level controls (fully counter- CAUTION: Parallel-Mono wiring requires clockwise) and turn off the amplifier before wir- installation of a jumper wire. Do not ing it as described below. Refer to Figure 3.6. switch to Stereo or Bridge-Mono mode until this output jumper wire is removed. 3.6.1 Stereo Mode IMPORTANT: The Channel 2 IOC indicator Set the back panel stereo/mono switch to Ste
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Power-Tech .1 Series Power Amplifiers 3 Setup 3.7 Set Input Sensitivity 3.8 Connect to AC Mains 4 Operation The input sensitivity switch inside the amplifier Connect your amplifier's power cord to the AC is set to 0.775 volt RMS at the factory. (Factory mains power source (power outlet). 4.1 Precautions setting for international models is 1.4V). It can Your amplifier is protected from internal and WARNING: The third prong of this con- be changed to 1.4 volts or a voltage gain of 26 extern
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Power-Tech .1 Series Power Amplifiers 4 Operation 4.2 Front Panel Controls and Indicators C. Enable Indicator Enable indicator shows the on/off status of the low- The diagram below explains the controls and indicators voltage supply. on the front panel of the Power-Tech .1 Series. D. Power Switch A. Level Controls Power switch (and circuit breaker for the Power-Tech Continuously variable level controls for each channel. 1.1, Power-Tech 2.1 and 220/240 VAC Power-Tech B. SPI/IOC Indicator 3
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CTs Multi-Channel Power Amplifiers 4 Operation 4.3 Back Panel Controls and Connec- G. Reset Switch tors Circuit breaker reset switch (100/120 VAC Power-Tech 3.1 only) The diagram below explains the controls and connec- tors on the back panel of the Power-Tech .1 Series. H. Power Cord F. Stereo/mono Switch I. XLR Input Connectors Stereo/mono switch for selecting Stereo, Bridge-Mono Balanced XLR connectors for input. or Parallel-Mono modes. J. 1/4-inch Input Connectors 1/4-inch balanced phone
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CTs Multi-Channel Power Amplifiers This page intentionally left blank. page 12 Operation Manual
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Power-Tech .1 Series Power Amplifiers 5 Advanced Features and Options NOTE: For detailed information about 5.1.2 Ultrasonic and Radio Fre- 5.1.4 Transformer Thermal Protection these Crown amplifier features, please quency Protection consult the Crown Amplifier Application An amplifier's slew rate only needs to be large This activates in the rare case where the unit's Guide, available on the Crown website transformer temperature rises to unsafe levels. enough to deliver the maximum voltage a
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M B-T1B Power-Tech .1 Series Power Amplifiers 5 Advanced Features and Options Again, this should be possible only when oper- ating outside rated conditions, as when the amplifier is used to drive a 1-ohm load, or when driving a severely clipped signal. A Power-Tech .1 Series amplifier will not blow its fuse or trip its breaker unless something is wrong. In the rare event that an internal fuse blows, please refer the unit to a qualified tech- nician. If a breaker trips, try to identify and
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Power-Tech .1 Series Power Amplifiers 6 Troubleshooting CONDITION: No power to the CONDITION: No sound. amplifier. POSSIBLE REASON: POSSIBLE REASON: • The amplifier has just been turned on and is • The amplifier's Power switch is off. still in the 4-second turn-on delay. • The amplifier is not plugged into the power • The amplifier is in drive protection mode. This receptacle. can occur with improper source signals like infrasonic square waves or input overloads • The amplifier's low-vol
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Power-Tech .1 Series Power Amplifiers 7 Specifications Minimum Guaranteed Power Power-Tech 1.1 Power-Tech 2.1 Power-Tech 3.1 120 VAC, 60 Hz Units, Stereo mode, per channel, both channels driven 1 kHz with 0.1% THD Stereo, 4 ohms per ch. 305 460 760 Stereo, 8 ohms per ch. 220 325 540 120 VAC, 60 Hz Units, Bridge mono mode 1 kHz with 0.1% THD 8 ohms 605 910 1,525 16 ohms 445 660 1,090 120 VAC, 60 Hz Units, Parallel mono mode 1 kHz with 0.1% THD 2 ohms 605 920 1,530 4 ohms 440 655 1,080 Perfo
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Power-Tech .1 Series Power Amplifiers 7 Specifications Performance (continued) Power-Tech 1.1 Power-Tech 2.1 Power-Tech 3.1 AC Line Current 100 and 120 VAC units 6 A 10 A 15 A 220 and 240 VAC units 3 A 5 A 7 A Ventilation Flow-through ventilation from Flow-through ventilation from Flow-through ventilation fr
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Power-Tech .1 Series Power Amplifiers 8 Service shipping pack, however we still recom- Crown amplifiers are quality units that rarely 8.2.2 Factory Service mend using a Crown Supplied Shipping require servicing. Before returning your unit for To obtain factory service, fill out the service Container. Minimum recommended servicing, please contact Crown Factory Ser- information page found in the back of this man- requirements for materials are as follows: vice to verify the need for servicing
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Power-Tech .1 Series Power Amplifiers 9 Warranty UNITED STATES & CANADA SUMMARY OF WARRANTY est, insurance, closing costs, and other finance FROM ANY DEFECT IN THE NEW CROWN charges less a reasonable depreciation on the PRODUCT. THIS INCLUDES ANY DAMAGE TO Crown International, 1718 West Mishawaka Road, product from the date of original purchase. War- ANOTHER PRODUCT OR PRODUCTS RESULT- Elkhart, Indiana 46517-4095 U.S.A. warrants to ranty work can only be performed at our autho- ING FROM SUCH
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Power-Tech .1 Series Power Amplifiers 9 Warranty WORLDWIDE EXCEPT USA & CANADA SUMMARY OF WARRANTY replacement, or refund. We may not elect refund DISCLAIMER OF CONSEQUENTIAL AND Crown International, 1718 West Mishawaka Road, unless you agree, or unless we are unable to pro- INCIDENTAL DAMAGES Elkhart, Indiana 46517-4095 U.S.A. warrants to vide replacement, and repair is not practical or YOU ARE NOT ENTITLED TO RECOVER FROM US you, the ORIGINAL PURCHASER and ANY SUB- cannot be timely made.
