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Related Manuals for Carver pt1250
Summary of Contents for Carver pt1250
- Page 1 Professional Stereo Power Amplifier...
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Page 2: Table Of Contents
Introduction ...1 Unpacking and Paperwork ...1 Features and Specifications pt1250...2 pt1800...4 pt2400...6 Controls and Functions pt1250...8 pt1800/2400...10 Installation pt1250 Location and General Precautions...12 Mechanical Considerations ...12 Rear Support for Road Applications ...12 Thermal Considerations...12 AC Power Considerations ...12 Magnetic Leakage Considerations...12... -
Page 3: Introduction
Their rugged construction and low profile make it ideal for sustaining the abuses of the road with reliability and space-saving economy. The pt1250 is rated at 625 watts per channel into 4 ohms and 465 watts per channel into 8 ohms. The pt1800 is rated at 900 watts per channel into 4 ohms and 600 watts per channel into 8 ohms. -
Page 4: Pt1250
High-efficiency linear tracking output design Dual-stage slow power-up High power to weight ratio (1250 watts/11 pounds) Independent CH 1/CH 2 protection circuits will pt1250 instantaneously activate if one of the following fault conditions is detected: Excessive High Frequency Over Temperature Short Circuit D.C. - Page 5 • features Continuous Average Output Power, both channels driven: 465 watts per channel into 8 ohms from 20Hz to 20kHz, with no more than 0.5% THD; 625 watts per channel into 4 ohms from 20Hz to 20kHz, with no more than 0.5% THD Parallel-mono operation: 100 watts into 4 ohms from 20Hz to 20kHz, with...
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Page 6: Pt1800
•... - Page 7 Power Output: Both channels: driven (20Hz-20kHz) 8 ohm/ch. 600 watts 4 ohm/ch. 900 watts 2 ohm/ch. 1100 watt Power Output: Series mono operation (20Hz-20kHz) 8 ohm 1800 watts 4 ohm 2200 watts Signal to Noise Ratio: >100dB (from rated power @ 4 /A weighted) Frequency Response: 20Hz to 20kHz...
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Page 8: Pt2400
•... - Page 9 Power Output: Both channels driven (20Hz-20kHz) 8 ohm/ch. 750 watts 4 ohm/ch. 1200 watts 2 ohm/ch. 1500 watts Power Output: Series mono operation (20Hz-20kHz) 8 ohm 2400 watts 4 ohm 3000 watts Signal to Noise Ratio: >100dB (from rated power @ 4 /A weighted) Frequency Response: 20Hz to 20kHz...
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Page 10: Controls And Functions
8dB. 2. LEFT/RIGHT VOLUME CONTROLS 10-step attenuators that adjust the relative output level of the pt1250. The amount of attenuation corresponds to the front-panel marking, in dB. In parallel mono-mode, only the LEFT level control is active. - Page 11 The fan speed is proportional to the amplifier power output. 8. FUSE AC power line fuse for the pt1250. For the 120-volt pt1250, use only one of the following, 10 ampere slo- blo fuses: Bussman MDA 10-amp, Little Fuse 3AB 10-amp, Schurter SPT (001.2534) 10-amp. For the 230- volt model, use only: Bussman MDA 5-amp, Little Fuse 3AB 5-amp, Schurter SPT (034.5239) 5-amp.
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Page 12: Pt1800/2400
Controls And Functions 1. POWER SWITCHES Channel 1 and Channel 2 power switches independently power up each channel. The slow start up feature of each power supply allows both switches to be pushed simultaneously. 2. SEQUENCE SWITCHES These switches make it possible to sequentially turn on and off amplifiers in one rack or multiple racks of units. A group of amplifiers can be powered up with the power switch on a designated master amplifier or remotely via a +5 to +15 VDC voltage source. - Page 13 8. XLR POLARITY SWITCH The XLR Polarity Switch conveniently configures both XLR connectors for Pin 3 +, (Pin 2-) or Pin 2 +, (Pin 3-). [the clear security cover can be installed after switches are set.] 9. INPUT CONNECTORS The pt2400/pt1800 amplifier comes equipped with XLR and Barrier inputs. The XLR connector is wired in parallel with the barrier strip connector on each channel.
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Page 14: Location And General Precautions
When several amplifiers are mounted together in a rack, you may need to provide air inlets from the outside of the rack. The pt1250 is fan cooled. The fan is internally mounted so that it draws air in from the rear and exhausts it out the front. - Page 15 This is infinitely preferable to breaking the ground pin off the power cord. The pt1250’s XLR connector uses the American wiring convention (pin 3 hot). Note that the pin 3 of the XLR connector corresponds to the tip connection on the TRS phone jack. All input connectors are connected in parallel; you can parallel the amplifier inputs by patching an unused input connector to its counterpart on the other channel.
- Page 16 The amplifier delivers 300-watts per channel to the 70-volt system. Transformers are still required at each loudspeaker (as is the case with all 70-volt systems). By re-calculating the tap power ratings on the step-down transformers used at the loudspeaker end, the pt1250 can deliver additional power beyond 300 watts.
- Page 17 AC Power Considerations Ensure that the pt1800/pt2400 is plugged into an outlet capable of supplying the correct voltage specified for your model and enough current to allow full-power operation of all the amplifiers plugged into it. The current demand of a power amplifier varies depending on several factors, including the impedance of the load, the output level of the amplifier, and the crest factor and duty cycle of the program material.
- Page 18 This will insure that the resistance of the speaker wire is less than 5% of 4 ohms, resulting in a transmission loss of less than 0.5 dB. The multi-way binding posts can accept spade lug, bare wire or banana connections. Be sure that all the fine strands of the wire are twisted together and contained within the connector.
- Page 19 CAUTION: In bridged mono operation, the output connections are actually a balanced output configuration. This means that both output terminals have voltage present (neither one may be grounded). 70 Volt Distribution Systems The pt2400/pt1800 have the capability of driving a 70 volt distribution system directly without the need for step up transformers.
- Page 20 Fig. 3 shows a typical set up in a 3 rack with 3 amplifiers. In this case the top amplifier is the master amplifier. Its channel 1 power switch controls the power up and power down sequence for the whole rack and possibly additional racks.
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Page 21: Operating Tips
In Case of Difficulty If you’re having trouble or suspect a problem with the pt1250/1800/2400, try some simple troubleshooting before contacting an Authorized Carver Professional Service Center. -
Page 22: Care And Service Assistance
Assistance C a re: Wipe off the pt1250/1800/2400 front panel and chassis from time to time with a soft, dry cloth. If you have something stubborn to remove, use a mild dish soap or detergent sparingly applied to a soft cloth. Don’t use alcohol, ammonia, or other strong solvents. -
Page 23: Warranty Information
Warranty Information Professional Power Amplifiers: 5 years WHAT IS COVERED: THIS WARRANTY COVERS DEFECTS IN MATERIALAND WORKMANSHIP ONLY. This limited Warranty DOES NOT extend to: 1) Damage caused by shipment, 2) damage caused by accident, misuse, abuse, failure to perform owner maintenance, or operation contrary to the instructions in the Carver Professional owner’s manual, 3) units on which the serial number has been defaced, modified or removed and 4) damage resulting from modification or attempted repair by any other person than authorized by Carver Professional. - Page 24 18 0 Year Performance Warranty Guarantee Made In America A Division Of Phoenix Gold International, Inc. 9300 North Decatur Portland OR 97203 Tel: 503.978.3344 Fax: 503.978.3302 Part #8100.0089 Rev. B...
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