pt1250/pt1800/pt2400 Professional Stereo Power Amplifier
CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR BACK) NO USER-SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL Introduction ..........................................................1 Unpacking and Paperwork ...................................1 Features and Specifications pt1250...............................................................2 pt1800...............................................................4 pt2400..
Introduction Congratulations on your purchase of a new Carver Professional Power Amplifier. It is backed by state-of-the-art engineering and manufacturing techniques to bring you the best in quality craftsmanship and reliable performance. The pt1250, pt1800 and, pt2400 are specially designed for pro touring applications. Their rugged construction and low profile make it ideal for sustaining the abuses of the road with reliability and space-saving economy.
pt1250 • features ● ● ● ● ● ● ● ● ● ● ● 2 465W per channel into 8 ohms 625W per channel into 4 ohms XLR and 1/4” TRS input connectors Accepts balanced or unbalanced lines Heavy-duty 5-way speaker binding posts Independent CH 1 and CH 2 Level Controls with 11 detented positions Internally configurable for Parallel Mono mode for single channel low impedance operation Highly efficient Pulse Width Modulated (PWM) power supply High-efficiency linear tracking output design Dual-stage slow power-up High pow
• 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 no more than 0.5% THD 70-volt stereo: 600 watts per channel 70-volt parallel mono: 750 watts Frequency Response: 20Hz to 20kHz (±0, -0.
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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 @ 4Ω/A weighted) Frequency Response: 20Hz to 20kHz ±0.5dB Channel Seperation: >55db @ 1kHz Slew Rate: 25V/µs THD: 4Ω 20-20kHz (at 900W) < 0.5% IM Distortion: <0.1% Damping Factor: >200 @ 1kHz Sensitivity: 1.
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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 @ 4Ω/A weighted) Frequency Response: 20Hz to 20kHz ±0.5dB Channel Seperation: >55db @ 1kHz Slew Rate: 25V/µs THD: 4Ω 20-20kHz (at 1200W) < 0.5% IM Distortion: <0.1% Damping Factor: >200 @ 1kHz Sensitivity: 1.
1 2 3 4 5 pt1250 Controls And Functions 1. CLIPPING ELIMINATOR Pressing this switch turns on the clipping eliminator circuit. In this mode, the amplifier output remains undistorted even when overdriven by 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. 3. POWER SWITCH This turns the amplifier on. 4.
6 7 8 9 10 11 6. POWER CORD Connect to a properly configured outlet providing the line voltage specified for your model. 7. FAN SPEED Push-button switch that sets the idle speed of the cooling fans. For normal usage, use the low-speed position. 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 sloblo fuses: Bussman MDA 10-amp, Little Fuse 3AB 10-amp, Schurter SPT (001.2534) 10-amp.
1 2 3 4 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.
5 9 6 7 11 8 10 12 14 13 15 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. Channel 1 is used to drive both channels in either mono configuration. 10.
pt1250 Installation Location and General Precautions Observe the following precautions when choosing a location for your amplifier. A. Do not expose the unit to rain or moisture. If a fluid or foreign object should enter the unit, disconnect the power plug and contact an authorized dealer or service center. Do not pull out the plug by pulling on the cord; grasp the plug firmly. B. Protect from heat and allow adequate ventilation. Place away from direct sources of heat, such as heating vents and radiators.
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. For balanced operation: 1/4-inch phone jack: Use a 3-conductor TRS 1/4” phone plug.
70V Distribution Systems The pt1250 has sufficient output voltage capability in stereo mode to drive 70-volt distribution systems without using a step-up transformer at the amplifier. 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.
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.
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. If even one strand is loose and can touch the adjacent terminal, a short circuit may result. Class I (NEC) wiring must be used.
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. pt2400 in stereo 1200W/channel. pt1800 in stereo 700W/Channel. For minimum wire loss, use appropriate wire size for the length of distance travelled.
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. Channel 2 may be used as an optional backup for channel 1. All other amplifiers have power switches turned off and sequence switches turned on. Each amplifier channel controls the next amplifier channel in succession via an internally generated +11.
Operating Tips Using the pt1250/pt1800/pt2400 Once the amplifier has been installed and wired into the system, you are ready to use it. Here are some tips to help you get the most from it. • Verify that all switches (Stereo / Mono, Clipping Eliminator and Level Defeat) have been set to the mode that you want.
Distortion Distortion is usually caused by excessive loss in the input controls (the mixer/equalizer/crossover can’t produce enough output), overdriving resulting in output clipping, or current limiting caused by excessively low load impedances. 1. Check the setting of the Input Level controls. If set too low, the preceding piece of equipment may not have sufficien output to overcome the loss. 2.
Warranty Information Professional Power Amplifiers: 5 years WHAT IS COVERED: THIS WARRANTY COVERS DEFECTS IN MATERIALAND WORKMANSHIP ONLY.
18 0 DAY Performance Guarantee Made In America 5 Year Warranty 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.
