Crown Power-Tech 1.1 Operation Manual Download Page 23 | Manualshive

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Power-Tech .1 Series

Power Amplifiers

page 23

Operation Manual

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Summary of Contents for Power-Tech 1.1

Page 1: ...n or maintenance The information provided in this manual was deemed accurate as of the publication date However updates to this informationmay have occurred To obtain the latest version of this manual please visit the Crown website at www crownaudio com Trademark Notice Crown Amcron and ODEP are registered trademarks of Crown International Grounded Bridge is a trademark of Crown International Othe...

Page 2: ...long periods of time 14 Refer all servicing to qualified service person nel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped 15 To reduce the risk of fire or electric shock...

Page 3: ...9 Startup Procedure 9 4 Operation 9 4 1 Precautions 9 4 2 Front Panel Controls and Indicators 10 4 3 Back Panel Controls and Connectors 11 5 Advanced Features and Options 13 5 1 Protection Systems 13 5 1 1 ODEP 13 5 1 2 Ultrasonic and Radio Frequency Protection 13 5 1 3 Drive Protection 13 5 1 4 Transformer Thermal Protection 13 5 1 5 Fuses and Circuit Breakers 13 5 2 Option 14 5 2 1 MT BB 14 6 Tr...

Page 4: ...mbine to pro vide performance and reliability that sur pass all traditional designs Safe with any load Bridge Mono and Parallel Mono modes make it easy to opti mize the amplifier s performance for a wide range of loads Complete protection against shorted out puts mismatched loads overheating input output DC and high frequency over load full internal fault protection Balanced phone jack inputs in p...

Page 5: ...the Important Safety Instruc tions found at the beginning of this man ual 3 2 Install Your Amplifier CAUTION Before you begin make sure your amplifier is disconnected from the power source with power switch in the off position and all level controls turned completely down counterclock wise Use a standard 19 inch 48 3 cm equipment rack See Figure 3 1 for amplifier dimensions You may also stack amps...

Page 6: ...B 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 inch phone connectors Figure 3 3 shows connector pin assignments for balanced wiring and Figure 3 4 shows connec tor pin assignments for unbalanced wiring NOTE Custom wiring should only be per formed by qualified personnel Figure 3 3 Balanced Input Connector Wirin...

Page 7: ...f 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 the distance from amplifier to speaker CAUTION Never use shielded cable for output wiring Distance Wire Size up to 25 ft 16 gauge 26 40 ft 14 gauge 41 60 ft 12 gauge 61 100 ft 10 gauge...

Page 8: ...Mono mode NOTE The Channel 2 level control should be set fully counter clockwise when oper ating the amplifier in Bridge Mono mode 3 6 3 Parallel Mono Mode CAUTION Parallel Mono wiring requires installation of a jumper wire Do not switch to Stereo or Bridge Mono mode until this output jumper wire is removed IMPORTANT The Channel 2 IOC indicator will remain lit when operating in Paral lel Mono mode...

Page 9: ... glow 4 Turn up the level of your audio source to an optimum level 5 Turn up the Level controls on the amplifier until the desired loudness or power level is achieved 6 Turn down the level of your audio source to its normal range If you ever need to make any wiring or installa tion changes don t forget to disconnect the power cord For help with determining your system s opti mum gain structure sig...

Page 10: ...SPI IOC Indicator Dual function indicator for each channel flashes green for signal presence SPI and yellow if any distortion exceeds 0 05 IOC Figure 3 8 Power Tech 1 Series Front Panel Controls and Indicators C Enable Indicator Enable indicator shows the on off status of the low voltage supply D Power Switch Power switch and circuit breaker for the Power Tech 1 1 Power Tech 2 1 and 220 240 VAC Po...

Page 11: ... Series F Stereo mono Switch Stereo mono switch for selecting Stereo Bridge Mono or Parallel Mono modes G Reset Switch Circuit breaker reset switch 100 120 VAC Power Tech 3 1 only H Power Cord I XLR Input Connectors Balanced XLR connectors for input J 1 4 inch Input Connectors 1 4 inch balanced phone jacks for input 4 Operation Figure 3 9 Power Tech 1 Series Back Panel Controls and Connectors ...

Page 12: ...CTs Multi Channel Power Amplifiers page 12 Operation Manual This page intentionally left blank ...

Page 13: ...rarily removes output drive to protect the amplifier and its loads Drive pro tection can be activated in two situations First if dangerous subsonic frequencies or direct current DC is detected in the amplifier s out put drive protection will activate The amplifier resumes normal operation when it no longer detects dangerous output Activating this pro tection is very unlikely but improper source si...

Page 14: ...n be reset using the front panel power switch The circuit breaker for a Power Tech 3 1 can be reset using the back panel reset switch If the problem persists refer the unit to an authorized Crown Service Center 5 2 Option 5 2 1 MT BB The MT BB is an accessory panel that provides barrier strip input connectors An MT BB accessory might be desirable in applications requiring bare wire or spade lug co...

Page 15: ...e 4 second turn on delay The amplifier is in drive protection mode This can occur with improper source signals like infrasonic square waves or input overloads that excessively clip the input signal The breaker has tripped First disconnect your speakers from the affected channel s one by one to determine if one of the loads is shorted Reset the breaker and apply an input signal If the signal presen...

Page 16: ...0 05 0 05 0 05 Total Harmonic Distortion THD at rated power at 20 kHz 0 1 0 1 0 1 Intermodulation Distortion IMD 60 Hz and 7 kHz at 4 1 from 163 milliwatts to full bandwidth power 0 05 0 05 0 05 Damping Factor 10 Hz to 400 Hz 1000 1000 1000 Crosstalk below rated power 20 Hz to 1 kHz 60 dB 60 dB 60 dB Controlled Slew Rate 13 volts ms 13 volts ms 13 volts ms Input Impedance nominally balanced nomina...

Page 17: ...g for rapid uniform heat dissipation Internal heat sinks with forced air cooling for rapid uniform heat dissipation Dimensions Width Height Depth EIA Standard 19 inch 48 3 cm rack mount EIA RS 310 B 3 5 inches 8 9 cm 16 inches 40 6 cm EIA Standard 19 inch 48 3 cm rack mount EIA RS 310 B 3 5 inches 8 9 cm 16 inches 40 6 cm EIA Standard 19 inch 48 3 cm rack mount EIA RS 310 B 3 5 inches 8 9 cm 16 in...

Page 18: ...f you prefer you may prepay the cost of ship ping and Crown will reimburse you Send cop ies of the shipping receipts to Crown Factory Service to receive reimbursement Your repaired unit will be returned via UPS ground Please contact us if other arrange ments are required 8 2 3 Factory Service Shipping Instructions 1 Before sending a Crown product to the factory for service first call the Crown Fac...

Page 19: ...center or our factory All expenses in remedying the defect including surface shipping costs in the United States will be borne by us You must bear the expense of shipping the product between any for eign country and the port of entry in the United States including the return shipment and all taxes duties and other customs fees for such for eign shipments HOW TO OBTAIN WARRANTY SERVICE You must not...

Page 20: ...r est insurance closing costs and other finance charges less a reasonable depreciation on the product from the date of original purchase War ranty work can only be performed at our autho rized service centers We will remedy the defect and ship the product from the service center within a reasonable time after receipt of the defec tive product at our authorized service center HOW TO OBTAIN WARRANTY...

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Page 22: ...Power Tech 1 Series Power Amplifiers page 22 Operation Manual ...

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