PL PROFESSIONAL POWER AMPLIFIERS CLIP PL CLIP SIGNAL SIGNAL PROTECT PROTECT ACTIVE CH A PROFESSIONAL POWER AMPLIFIER ACTIVE CH B -6 -6 -10 9001 -10 -3 -3 -15 -15 -1 -30 -80 -1 -30 -80 0dB 0dB CLIP CLIP SIGNAL SIGNAL PROTECT PROTECT ACTIVE CH A 8001 PROFESSIONAL POWER AMPLIFIER ACTIVE CH B PL -6 -6 -10 -10 -3 -3 -15 -15 -1 -30 -80 -1 -30 -80 0dB 0dB PL CLIP CLIP SIGNAL SIGNAL PROTECT PROTECT ACTIVE CH A -6 -10 ACTIVE CH B -6 -10 -3 -15 7001 PROF
Important Precautions This symbol is used to alert the operator to follow important operating procedures and precautions detailed in documentation. This symbol is used to warn operators that uninsulated “dangerous voltages” are present within the equipment enclosure that may pose a risk of electric shock. 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.
Power Amplifier Owner’s Manual PL Table of Contents 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 TourClass® Protection Features User Precautions Speaker Protection Recommended Speaker Cabling Maintenance User Responsibility Service and Repair Appendix A Appendix B Appendix C Ap
PL PL8001, PL9001 Front Dimensions CLIP Front height 5.25" 133mm PL CLIP SIGNAL SIGNAL PROTECT PROTECT ACTIVE CH A PROFESSIONAL POWER AMPLIFIER ACTIVE CH B 9001 -6 -6 -10 -10 -3 -3 -15 -15 -1 -30 -80 -1 -30 -80 0dB 0dB Front width 19" / 483mm PL3301-PL7001 Front Dimensions Front height 3.
PL Introduction Congratulations on your purchase of a new PL Series professional power amplifier, and thank you for your confidence in Crest Audio products. You are among the growing number of audio professionals who have made Crest Audio one of the world’s leading suppliers of professional and commercial/industrial audio systems. For your safety, please read the Important Precautions section before installing and operating the amplifier.
PL Front Panel 1 2 3 4 5 6 7 8 PL CLIP CLIP SIGNAL SIGNAL PROTECT PROTECT ACTIVE CH A ACTIVE CH B -6 -10 9 -6 -10 -3 -15 7001 PROFESSIONAL POWER AMPLIFIER -3 -15 -1 -30 -80 0dB -1 -30 -80 0dB 1. Rack Mounting Ears. Two front panel mounting holes are provided on each mounting ear. 2. Rack Handles. Rack handles are removable by removing screws on back of rack ears. Never try to hold the circuit breaker/power switch in the “ON” position if it won’t stay there itself! 3.
PL Rear Panel See Appendix E for information specific to model PL9001. + + Designed & manufactured in the USA by: A AB • • Crest Audio Inc. 100 Eisenhower Dr.
PL 13-14. Balanced 1/4" (TRS) & XLR Input Connectors. Tip - Positive (+) 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 connectors, 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.
PL Operation Connecting Power / Circuit Size Requirements. PL Series amplifier power requirements are rated at: a) “idle” b) 1/8th power (“typical” music conditions) c) 1/3rd power (“continuous” music conditions) d.) maximum rated power (circuit breaker limited). The maximum power current draw rating is limited only by the front panel circuit breaker. Consult the specifications in the Appendices section for figures on the current that each amplifier will demand.
PL Connecting Inputs. Use either the XLR or 1/4-inch input connectors on the rear to supply audio signals to your Crest Audio PL Series amplifier. Both connectors accept balanced and unbalanced audio connections. (The PL 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.
PL Mode Selection. The three-position, recessed Mode Select switch (located on the rear panel) configures the amplifier for either Stereo, Parallel or Bridged Mono Mode. Amplifiers are factory-configured for Stereo Mode. Stereo Mode. In Stereo Mode, both channels operate independently, with their input attenuators controlling their respective levels. Signal at Channel A’s input produces output at Channel A’s output, while signal at Channel B’s input produces output at Channel B’s output.
PL Stereo Mode Connections NOTE: the Binding Post version of the PL9001 features two pair of 5-Way Output Binding Posts.
PL TourClass® Protection Every model in the PL Series incorporates TourClass protection features. Derived from Crest Audio’s extensive experience with the world’s largest sound rental companies, the TourClass group of circuits sets the industry standard for assured protection of internal amplifier circuits and all connected loads. ACL (Active Clip Limiting). At the amplifier’s full power limit, or clipping point, ACL will be activated. This is indicated by illumination of the Clip LED.
PL User Precautions Speaker Protection All loudspeakers have electrical, thermal, and physical limits which must be observed to prevent damage or failure. Cone or compression drivers can be damaged (sometimes to the point of failure) from excessive power, low frequencies applied to high frequency drivers, severely clipped waveforms, and DC voltage. All PL Series amplifiers automatically protect speakers from DC voltages and subsonic signals. For more information, see the TourClass Protection section.
PL Maintenance A PL 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.
PL Appendices
PL Appendix A - Amplifier Specifications 1kHz, 0.01% THD+N PL3301 PL4601 PL6001 PL7001 PL8001 PL9001 8Ω Stereo Power 160W 250W 400W 600W 700W 1000W (.03% THD+N) 4Ω Stereo Power 250W 435W 600W 900W 1200W 1800W (.03% THD+N) 2Ω Stereo Power N/A 500W 750W 1000W 1400W 2500W (.03% THD+N) 8Ω Bridged Mono Power 500W 830W 1200W 1800W 2400W 3600W (.03% THD+N) 4Ω Bridged Mono Power N/A 1000W 1500W 2000W 2800W 5000W (.
PL Appendix B - PL Block Diagram R T CHANNEL A PREAMP + NON-INVERTED 2 † 2/3 3 - 1 OUTPUT STAGE INVERTED PIN 2 / 3 + JUMPER (REAR(REAR PANELPANEL SWITCH ON PL9001) SWITCH A + A - AMP FRONT END ON CA18) BRIDGED PARALLEL STEREO R SWITCH OUTPUT RELAY † PREAMP INCORPORATES INPUT SENSITIVITY/VOLTAGE GAIN JUMPER (REAR PANEL SWITCH SWITCHON ONPL9001) CA18) (REAR PANEL + † - ATTENUATOR OUTPUT STAGE PREAMP T CHANNEL B B NON-INVERTED + 2 3 ATTENUATOR AMP FRONT END OUTPUT RELAY 2/3
PL Appendix C - Wire Gauge Chart Stranded Cable Lgth. (ft.) Wire Gauge (AWG) Power Loss (8 ohm load) Power Loss (4 ohm load) Power Loss (2 ohm load) 5 18 16 14 12 10 0.81% 0.51 0.32 0.20 0.128 1.61% 1.02 0.64 0.40 0.25 3.2% 2.0 1.28 0.80 0.51 10 18 16 14 12 10 1.61% 1.02 0.64 0.40 0.25 3.2% 2.0 1.28 0.80 0.51 6.2% 4.0 2.5 1.60 1.01 40 18 16 14 12 10 8 6.2% 4.0 2.5 1.60 1.01 0.60 11.9% 7.7 5.0 3.2 2.0 1.20 22% 14.6 9.6 6.2 4.0 2.4 18 16 14 12 10 8 11.9% 7.7 5.0 3.2 2.0 1.20 22% 14.
Appendix D Rear Panel Symbols - Legend PL Input Connection Section XLR Connector Polarity Indicator 2+ 1 3- TRS Connector Polarity Indicator + A Mode Selection Switch - Bridged Mono Position AB A Mode Selection Switch - Parallel Position A B A B Mode Selection Switch - Stereo Position A B Chassis Ground Lift Switch - Ground Lifted Position Chassis Ground Lift Switch - Grounded Position GAIN Gain Select Switch (PL9001) Ø 40x 20x dBu XLR Pin + 2 XLR pin hot (+) select switch (PL9001) 3 Outpu
PL Appendix E PL9001 Power Amplifier - Special Functions The PL9001 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 @ 8Ω), or for optional voltage gains of X40 or X20.
PL Notes Crest Audio PL Series Power Amplifiers Models PL3301, PL4601, PL6001, PL7001, PL8001, PL9001 Appendix E
Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652 USA TEL: 201.909.8700 FAX: 201.909.8744 http://www.crestaudio.com Printed in USA C4400009 v. 1.1 10/22/97 © 1997 Crest Audio, Inc. Choice of touring professionals.
