Crest_Audio_CA_Series_Owners_Manual电路图.pdf

OWNERS MANUAL PROFESSIONAL POWER AMPLIFIERS Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier Professional Power Amplifier RadioFans.CN 收音机爱 好者资料库 1. Save the carton and packing material even if the equipment has arrived in good condition. Should you ever need to ship the unit, use only the original factory packing. 2. Read all documentation before oper- ating your equipment. Retain all doc- umentation for future reference. 3. Follow all instructions printed on unit chassis for proper operation. 4. Do not spill water or other liquids into or on the unit, or operate the unit while standing in liquid. 5. Make sure power outlets conform to the power requirements listed on the back of the unit. 6. Do not use the unit if the electrical power cord is frayed or broken. The power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular atten- tion to cords and plugs, convenience receptacles, and the point where they exit from the appliance. 7. Always operate the unit with the AC ground wire connected to the electri- cal system ground. Precautions should be taken so that the means of ground- ing of a piece of equipment is not defeated. 8. Mains voltage must be correct and the same as that printed on the rear of the unit. Damage caused by connec- tion to improper AC voltage is not cov- ered by any warranty. 9. Have gain controls on amplifiers turned down during power-up to pre- vent speaker damage if there are high signal levels at the inputs. 10. Power down B. Objects have fallen, or liquid has been spilled into the equipment; C. The equipment has been exposed to rain; D. The equipment does not appear to operate normally, or exhibits a marked change in performance; E. The equipment has been dropped, or the enclosure damaged. 22. To obtain service, contact your nearest Crest Audio Service Center, Distributor, Dealer, or Crest Audio at 201.909.8700 (USA). Important Precautions This symbol is used to alert the oper- ator to follow important operating procedures and precautions detailed in documentation. This symbol is used to warn opera- tors that uninsulated “dangerous volt- ages” are present within the equip- ment enclosure that may pose a risk of electric shock. RadioFans.CN 收音机爱 好者资料库 Crest Audio CA Series Power AmplifiersPage 3 Models CA2, CA4, CA6, CA9, CA12, CA18 Introduction Unpacking Installation and Mounting Front Panel Rear Panel Internal Configuration and Control Operation Connecting Power / Circuit Size Requirements Cooling Requirements Connecting Inputs Connecting Outputs Mode Selection Stereo /Parallel/Bridged Mono Connections TourClassProtection Features User Precautions Speaker Protection Recommended Speaker Cabling Maintenance User Responsibility Service and Repair 5 5 5 6 7 8 9 9 9 10 10 10 12 14 15 15 15 16 16 16 Power Amplifier Owners Manual Table of Contents Appendix ASpecifications Appendix BCA Block Diagram Appendix CWire Gauge Charts Appendix DRear Panel Symbols - Legend Appendix ECA18 Power Amplifier - Special Functions RadioFans.CN 收音机爱 好者资料库 Page 4Crest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 Professional Power Amplifier Front height 5.25 133mm Front width 19 / 483mm CA12, CA18 Front View Professional Power Amplifier Front height 3.5 89mm CA2-9 Front View Rear the unused connectors may be used for “loop through” con- nection to other amplifiers. NOTE: Unbalanced “Tip/Sleeve” plugs may be used with the balanced TRS “Tip/Ring/Sleeve” connectors. The “ring” terminal or negative input will be connected to ground internally. When using three-pole (stereo) TRS connec- tors, make sure that the ring connection is made either to the cold () output of the source equipment, or to ground. Incorrect connections may cause a 6dB loss in level. 15. Fan Inlet Ports this indicates that the temperature sensing circuits are operating normally. The fan speed increases only as required by heat sink temperatures, keeping fan noise to a minimum. Under extreme thermal load, the fans will force a very large volume of air through the heat sinks. If either heat sink surpasses the maximum allowed temperature, the sensing circuit will open the output relay, disconnecting the load from that channel. If the power transformer overheats, another sensing circuit opens both channel output relays until the transformer cools to a safe temperature. IMPORTANT: To ensure optimum cooling, periodically clean the amplifier fan filters (removable without tools). Also make certain that there is enough space around the front of the amplifier to allow the cooling air to escape. If the amplifier is rack-mounted, do not use doors or covers on the front of the rack; the exhaust air must flow out without resistance. If the amplifiers are to be housed in racks with closed backs, allow at least one (1) standard rack space of opening in the front of the rack for every four amplifiers. Crest Audio CA Series Power AmplifiersPage 9 Models CA2, CA4, CA6, CA9, CA12, CA18 Connecting Inputs. Use either the XLR or 1/4-inch input connectors on the rear to supply audio signals to your Crest Audio CA Series amplifier. Both connectors accept balanced and unbalanced audio connections. (The CA Series amplifiers are configured standard with “Pin 2 hot” on XLR inputs. Please note that some other Crest Audio amplifiers are configured with “Pin 3 hot”). The unused connector can be used to jumper the audio input to another amplifier input. For more information, see the sections on Balanced 1/4 (TRS) in addition, both must be adjusted to the same setting. Either the 1/4 (TRS) or XLR input may be used. NOTE: The channel B input connectors (XLR and/or TRS) may be used to “loop thru” the channel A signal when in parallel or bridged mono mode. Use extreme caution when operating the amplifier in Bridged Mono Mode. Never ground either side of the speaker cable when the amplifier is in Bridged Mono Mode; both sides are “hot.” If an output patch panel is used, all connections must be isolated from each other and from the panel. The recommended minimum nominal load impedance in the Bridged Mono Mode is 4 ohms, which is the equivalent to driving both channels separately at 2 ohms. Driving bridged loads of less than the recommended minimums will activate the IGM circuitry, resulting in a loss of power, and may also lead to a thermal protect condition. See figures on pages 12 the reduced acoustical damping could cause a ported speaker to “bottom out” even at moderate power. Consult the speaker system specifications to determine its frequency limits, and employ a roll-off filter if necessary. Recommended Speaker Cabling The wire gauge charts will assist you in determining the optimum copper wire gauge for your speaker cables. Remember that the speaker cable resistance robs amplifier power in two ways: through power lost directly to resistance (often referred to as I2R loss), and through increased total load resistance, which decreases the amount of power available from the amplifier. The charts (Appendix C) give cable length fig- ures in feet/AWG wire gauges and in metric values. Crest Audio CA Series Power AmplifiersPage 15 Models CA2, CA4, CA6, CA9, CA12, CA18 Maintenance A CA Series amplifier requires no routine maintenance other than occasional cleaning or replacement of the fan intake filters on the rear of the amplifier. (This operation does not require any tools). Filters must be kept clear and clean to ensure proper ventilation through the unit. If the amplifier is used in an extremely dusty or smoky environment, the filter should be cleaned or changed frequently and the unit should be peri- odically “blown free” (using compressed air) of any foreign matter that may penetrated through the filter. Users will not need to make any internal adjustments to the amplifier during its lifetime. There are no user- serviceable parts or adjustments that require opening the power amplifier. Cover removal exposes the risk of shock, so refer all servicing to qualified service technicians authorized by Crest Audio. User Responsibility Your CA Series amplifier is very powerful and can be potentially dangerous to loudspeakers and operators alike. It is your responsibility to read the section titled “Important Precautions” and make sure that the amplifier is installed, wired, and operated properly as instructed in this manual. Many loudspeakers can be easily damaged or destroyed by overpowering, especially with the high power available from a bridged amplifier. Read the section on Speaker Protection and always be aware of the speakers continuous and peak power capabilities. Crest Audio is not responsible for damage to loudspeakers for any reason. Service and Repair In the unlikely event that your amplifier develops a problem, it must be returned to an authorized distributor, service center or shipped directly to our factory. To obtain service, contact your nearest Crest Audio Service Center, Distributor, Dealer, or any of the worldwide Crest Audio offices. For contact information, reach Crest Audio Inc. Customer Service directly at: TEL. 201.909.8700 (USA) Fax. 201.909.8744 (USA). Because of the complexity of the design and the risk of electrical shock, all repairs should be attempted only by qualified technical personnel. If the unit needs to be shipped back to the factory, it must be sent in its original carton. If improperly packed, your amplifier may be damaged. For those with Internet access, please visit the Crest Audio website at: Page 16Crest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 Appendices Appendix ACrest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 Appendix A - Amplifier Specifications 1kHz, 0.01% THD+N 8 Stereo Power 4 Stereo Power 2 Stereo Power 8 Bridged Mono Power 4 Bridged Mono Power 20Hz-20kHz, 0.1% THD+N 8 Stereo Power 4 Stereo Power 2 Stereo Power 8 Bridged Mono Power 4 Bridged Mono Power Max RMS Output Voltage (each channel) Max Peak Output Voltage Frequency Response (+0 / -0.3dB, 1W/8) Power Bandwidth (rated power at 4, 1%THD+N) TourClass Protection THD+N (rated power, 4/1kHz) SMPTE IMD (rated power, 8, 60 Hz Rear panel: signal ground lift CA18: XLR polarity & input sens./voltage gain switches) Two rear panel variable speed DC fans, filters detatchable without tools CA2CA4CA6CA9CA12CA18 GainSensGainSensGainSensGainSensGainSensGainSens Factory StandardX45.775VX61.775VX68.775VX86.5.775VX97.5.775VX115.775V Option 1X40.866VX401.12VX401.32VX401.66VX401.87VX402.24V Option 2X201.73VX202.24VX202.65VX203.32VX203.74VX204.47V Crest Audio CA Series Power AmplifiersAppendix B Models CA2, CA4, CA6, CA9, CA12, CA18 Appendix B - CA Block Diagram BRIDGED - PARALLEL - STEREO SWITCH R T 2 3 1 2 3 1 R T 2 / 3 PIN 2 / 3 + JUMPER (REAR PANEL SWITCH ON CA18) + -INVERTED NON-INVERTED PREAMP PREAMP ATTENUATOR ATTENUATOR AMP FRONT END AMP FRONT END OUTPUT STAGE OUTPUT STAGE OUTPUT RELAY OUTPUT RELAY 2 / 3 PIN 2 / 3 + JUMPER (REAR PANEL SWITCH ON CA18) + - INVERTED NON-INVERTED B B + A - A + - CHANNEL A CHANNEL B PREAMP INCORPORATES INPUT SENSITIVITY/VOLTAGE GAIN JUMPER (REAR PANEL SWITCH ON CA18) Appendix CCrest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 Stranded Cable Lgth. (m) 2 5 10 30 Wire Gauge (mm2) 0.3 0.5 0.75 1.5 2.5 4 0.5 0.75 1.5 2.5 4 6 0.5 0.75 1.5 2.5 4 6 0.75 1.5 2.5 4 6 10 Power Loss (8 ohm load) 2.9% 1.74 1.16 0.58 0.35 0.22 4.3% 2.9 1.45 0.87 0.55 0.37 8.24% 5.6 2.9 1.74 1.09 0.73 15.5% 8.2 5.1 3.2 2.2 1.31 Power Loss (4 ohm load) 5.6% 3.4 2.3 1.16 0.70 0.44 8.2% 5.6 2.9 1.74 1.09 0.73 15.5% 10.8 5.6 2.9 1.74 1.09 0.73% 15.5 9.8 6.3 4.3 2.6 Power Loss (2 ohm load) 10.8% 6.7 4.5 2.3 1.39 0.87 15.5% 10.8 5.6 3.4 2.2 1.45 28% 19.9 10.8 6.7 4.3 2.9 45% 28 18.2 12.0 8.2 5.1 Appendix C - Wire Gauge Chart (Metric) Crest Audio CA Series Power AmplifiersAppendix C Models CA2, CA4, CA6, CA9, CA12, CA18 Stranded Cable Lgth. (ft.) 5 10 40 80 Wire Gauge (AWG) 18 16 14 12 10 18 16 14 12 10 18 16 14 12 10 8 18 16 14 12 10 8 Power Loss (8 ohm load) 0.81% 0.51 0.32 0.20 0.128 1.61% 1.02 0.64 0.40 0.25 6.2% 4.0 2.5 1.60 1.01 0.60 11.9% 7.7 5.0 3.2 2.0 1.20 Power Loss (4 ohm load) 1.61% 1.02 0.64 0.40 0.25 3.2% 2.0 1.28 0.80 0.51 11.9% 7.7 5.0 3.2 2.0 1.20 22% 14.6 9.6 6.2 4.0 2.4 Power Loss (2 ohm load) 3.2% 2.0 1.28 0.80 0.51 6.2% 4.0 2.5 1.60 1.01 22% 14.6 9.6 6.2 4.0 2.4 37% 26 17.8 11.8 7.7 4.7 Appendix C - Wire Gauge Chart (Imperial) Appendix DCrest Audio CA Series Power Amplifiers Models CA2, CA4, CA6, CA9, CA12, CA18 A B B A + + + A A B B B A A B XLR Pin + 2 3 GAIN dBu 40 x20 x + 1 3- 2+ A A B AB A Input Connection Section Output Connection Section XLR Connector Polarity Indicator TRS Connector Polarity Indicator Mode Selection Switch - Bridged Mono Position Mode Selection Switch - Parallel Position Mode Selection Switch - Stereo Position Chassis Ground Lift Switch - Ground Lifted Position Chassis Ground Lift Switch - Grounded Position Gain Select Switch (CA18) XLR pin hot (+) select switch (CA18) Speakon Output Connector - Channel A Stereo/Parallel Speakon Output Connector - Channel B Stereo/Parallel Speakon Output Connector - Bridged Mono 5-Way Binding Post Output Connection - Channel A Stereo/Parallel 5-Way Binding Post Output Connection - Channel B Stereo/Parallel 5-Way Binding Post Output Connection - Bridged Mono Appendix D Rear Panel Symbols - Legend Crest Audio CA Series Power AmplifiersAppendix E Models CA2, CA4, CA6, CA9, CA12, CA18 Appendix E CA18 Power Amplifier - Special Functions XLR Pin + GAIN dBu 40 x20 x A B + AB A A A B A A B B A B B A + + + Designed & manufactured in the USA by: Crest Audio Inc. 100 Eisenhower Dr. Paramus, New Jersey 07652 USA 2 3 1 3 2 XLR Pin + GAIN dBu 40 x20 x A B + 2 3 1 3 2 AB A A A B A A B B Designed & manufactured in the USA by: Crest Audio Inc. 100 Eisenhower Dr. Paramus, New Jersey 07652 USA B A NL4FC B A The CA18 rear panel features external switches for the following: XLR Pin+ Switch: This switch configures XLR input connection polarity. Either pin 2 or pin 3 may be selected as the “hot” (+) pin. Amplifiers are shipped pin 2 “hot” (+) from the factory. Gain Switch: This switch permits the amplifier to be configured for the standard input sensitivity (.775V for rated power 8), or for optional voltage gains of X40 or X20. Refer to the specifications for input sensitivity values at optional voltage gains of X40 and X20. NOTE: on the 5-way Output Binding Post version of the CA18, two pairs of 5-way binding posts are provid- ed for each channel, so that paralleling of speakers is possible. XLR Pin (+) SwitchGain Switch CA18 Binding Post Version - Rear View CA18 Speakon Version - Rear View ALWAYS power down the amplifier before changing settings with either the XLR Pin+ switch or the Gain switch! Crest Audio Inc. 100