Page 2 - Service Information; impor tant precautions
1 Save the carton and packing materials! Should you ever need to ship the unit,use only the original factor y packing. For replacement packaging, call Crest Audio’sCustomer Service Department directly. 2 Read all documentation beforeoperating your equipment. Retain all documentation for future refer...
Page 3 - table of contents; features overview; contents
p. 1 table of contents 1 2 3 4 5 6 7 how to use this manual p.2 introduction p.3 installation p.5 unpackingmountingcooling and ventilationpoweringmaintenance features overview p.11 front panelrear panel operation modes p.17 stereoparallelbridged connections p.21 inputoutput safety p.27 tourclass pro...
Page 4 - Pro II owner’s manual; how to use this manual; conventions; actions; tasks; warnings; note
p. 2 Pro II owner’s manual how to use this manual 1 conventions terms official Crest Audio features and each indicator or control on the amplifier will appear as: terms actions specific actions or selections the user can execute will appear as: actions tasks are broken down into steps 123 warnings i...
Page 5 - introduction; welcome; while drawing significantly smaller peak currents from the; manufacturing facili-
p. 3 introduction 1 welcome Congratulations on your purchase of a new Pro II Series professionalpower amplifier, and thank you for your confidence in Crest Audio prod-ucts. You are among the growing number of audio professionals who havemade Crest Audio one of the world’s leading suppliers of profes...
Page 7 - installation; unpacking
p. 5 installation 2 unpacking mounting cooling andventilation powering maintenance / what to do with the shipping carton / proper rack-mounting technique / keeping the amplifier cooled / grounding the amplifier / required AC line voltages / routine maintenance practices
Page 8 - If the packing materials are in good condition, please save them.
Pro II owner’s manual p. 6 installation 2 unpacking Please inspect the amplifier carefully immediately after unpacking. If you findany damage, notify your supplier/dealer immediately. Only the shipper mayfile a damage claim with the carrier for damage incurred during shipping. Besure to save the car...
Page 9 - mounting
p. 7 installation 2 mounting All Pro II Series amplifiers mount in standard 19-inch racks. Four front-panelmounting holes are provided on each amplifier. Rear mounting ears give addi-tional support, and use of rear supports is highly recommended in all mobileand touring sound systems. Handles are fi...
Page 10 - cooling and ventilation; Drawn in by dual 105; fans on the rear panel,
Pro II owner’s manual p. 8 installation 2 To ensure optimum cooling of the amplifier,periodically clean its fan filters. These are removablewithout tools. Make certain that there isenough space around thefront of the amplifier to allow the heated air toescape. If the amplifier israck-mounted, do not...
Page 11 - powering
p. 9 installation 2 powering Unless otherwise specified when ordered, Pro II amplifiers shipped to cus-tomers are configured as follows: North America 90 –255 VAC @ 50–60 Hz Europe 180 –255 VAC @ 50–60 Hz Asia 180 –255 VAC @ 50–60 Hz Australasia 180 –255 VAC @ 50–60 Hz South America 90 –255 VAC @ 50...
Page 13 - front panel; location of connectors and controls
p. 11 features overview 3 front panel rear panel / location of connectors and controls / legend of panel symbols
Page 15 - Protect; mode
p. 13 features overview 3 front panel 1 Rack Mounting Ears Two front-panel mounting holes are provided on each mounting ear. 2 Rack Handles 3 Fan Outlet Grills Pro II Series amplifiers are cooled by two, rear-mounted fans. Cool airflows over the heat sinks and exhausts through the front grills. Make...
Page 16 - rear panel; Output Connectors; hot; Mode Selection Switch; rear panel legend
Pro II owner’s manual p. 14 features overview 3 rear panel 1 Output Connectors Pro II Series power amplifiers are supplied with both high-current five-way binding posts and Speakons installed. Binding posts: one pair perchannel. Speakons: one connector per channel, plus a third connectorconfigured f...
Page 17 - XLR
p. 15 features overview 3 rear panel 3 Female Balanced XLR Input Connectors 4 Male Balanced XLR Input Connectors These connectors accept input signals on balanced male and female XLR input plugs. Connectors for each channel are in parallel; any unused XLR connectors may be used for daisy-chaining in...
Page 19 - stereo; choosing the appropriate mode
p. 17 operation modes 4 stereo parallel bridged / choosing the appropriate mode / switching between operation modes / keeping the amplifier cooled / special considerations when using bridged mode
Page 20 - mode selection; parallel; input on Channel A may be used. Individual channel attenuators; The channel B input connectors (male or female
Pro II owner’s manual p. 18 operation modes 4 mode selection The three-position, recessed Mode Select switch (located on the rear panel)configures the amplifier for Stereo, Parallel or Bridged mode. Amplifiers arefactory-configured for Stereo mode. stereo In Stereo mode, both channels operate indepe...
Page 23 - input; proper wiring schemes for connectors:
p. 21 connections 5 input output / proper wiring schemes for connectors: XLR speakonbinding post / correct signal paths: stereo, parallel, and bridged
Page 24 - connnections; inputs; outputs; female; male; bridged mono
Pro II owner’s manual p. 22 connnections 5 inputs Use either male or female XLR connectors on the rear to supply audio sig- nals to the inputs of your Crest Audio Pro II Series amplifier. Pro II Series amplifiers are configured standard with pin 2 hot on XLR inputs. The input XLR polarity switch can...
Page 25 - stereo mode; parallel mode; five-way binding post connectors; bridged mono mode; five-way binding post connectors
p. 23 connections 5 stereo mode five-way binding post connectors parallel mode five-way binding post connectors bridged mono mode five-way binding post connectors Unused XLR connectors can be utilized to daisy-chain a signalsource to additional amplifiers. Unused XLR connectors can be utilized to da...
Page 26 - speakon output connectors; speakon output connectors
Pro II owner’s manual p. 24 connnections 5 stereo mode speakon output connectors parallel mode speakon output connectors bridged mono mode speakon output connectors Unused XLR connectors can be utilized to daisy-chain a signalsource to additional amplifiers. Unused XLR connectors can be utilized to ...
Page 29 - safety; TourClass; the owner’s role in amplifier safety
p. 27 safety 6 user responsibility speaker protection TourClass / the owner’s role in amplifier safety / description of TourClass protection features / protecting your speakers
Page 30 - user responsibility; see the inside-front cover
Pro II owner’s manual p. 28 safety 6 user responsibility Your Pro II Series amplifier is very powerful and can be potentially dan-gerous to loudspeakers and operators alike. It is your responsibility toread impor tant precautions ( see the inside-front cover ) and make sure that the amplifier is ins...
Page 31 - recommended speaker cabling
p. 29 safety 6 speaker protection All loudspeakers have electrical, thermal, and physical limits which must beobserved to prevent damage or failure. Cone or compression drivers canbe damaged ( sometimes to the point of failure ) from excessive power, low frequencies applied to high frequency drivers...
Page 32 - IGM; AutoRamp; circuit; Status; Short Circuit
Pro II owner’s manual p. 30 safety 6 TourClass ® protection Every model in the Pro II Series incorporates TourClass protection fea-tures. Derived from Crest Audio’s extensive experience with the world’slargest sound rental companies, the TourClass group of circuits sets theindustry standard for assu...
Page 33 - DC Voltage; If an amplifier channel detects; voltage at its output terminals, the out-; Subsonic Frequencies
p. 31 safety 6 DC Voltage If an amplifier channel detects DC voltage at its output terminals, the out- put relay will immediately open to prevent loudspeaker damage.The Status LEDs will turn red. Subsonic Frequencies Built-in high pass filtering provides subsonic frequency protection for eachchannel...
Page 35 - service and suppor t; when to get support; suppor t
p. 33 service and suppor t 7 / when to get support / ways to contact Crest Audio suppor t contact us
Page 36 - customer service; customerserve; technical support; techserve; website
Pro II owner’s manual p. 34 service and suppor t 7 suppor t In the unlikely event that your amplifier develops a problem, it must bereturned to an authorized distributor, service center or shipped directly toour factory. To obtain service, contact your nearest Crest Audio Service Center,Distributor,...
Page 38 - specifications
Pro II owner’s manual p. 36 specifications a 800 W 750 W 1400 W 1350 W 2000 W 1900 W 2800 W 2700 W 4000 W 3800 W 92 V rms, 130 V peak each channel 20 Hz –20 kHz , +0 / -0.3 dB , -3 dB @ 135 kHz 20 Hz –20 kHz , +0 / -0.23 dB < 0.05% rated power @ 4 Ω , 1 kHz < 0.01% rated power @ 8 Ω , 60 Hz an...
Page 39 - block diagram
Page 40 - stranded cable length; meters
Pro II owner’s manual p. 38 wire gauge c stranded cable length 0.3 mm 2 0.5 0.75 1.5 2.5 4.0 2.9% 1.74 1.16 0.58 0.35 0.22 5.6% 3.4 2.3 1.16 0.70 0.44 10.8% 6.7 4.5 2.3 1.39 0.87 0.5 mm 2 0.75 1.5 2.5 4 6 4.3% 2.9 1.45 0.87 0.55 0.37 8.2% 5.6 2.9 1.74 1.09 0.73 15.5% 10.8 5.6 3.4 2.2 1.45 0.5 mm 2 0...
Page 41 - feet
p. 39 wire gauge c stranded cable length 18 AWG 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 18 AWG 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 18 AWG 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 ...
Page 42 - owner’s manual
owner’s manual Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652 USA TEL : 201.909.8700 FAX : 201.909.8744 http://www.crestaudio.com *A4400076* v. 1.0 4 / 29 / 98 Ch A Ch B - 80 - 30 - 15 - 10 - 6 - 3 - 1 Ø d B - 80 - 30 - 15 - 10 - 6 - 3 - 1 Ø d B 8 0 0 2 P r o f e s s i o n a l P o w e r A m p...
