User manual CARVER PT1800

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[. . . ] pt1250/pt1800/pt2400 Professional Stereo Power Amplifier Safety Information 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 The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. 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 Input Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Output Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Polarity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 70V Distribution Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Clipping Eliminator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Installation pt1800/pt2400 Location and General Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Rear Support for Road Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Thermal Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 AC Power Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Magnetic Leakage Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Input Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Output Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Polarity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Dual Mono. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Bridged Mono. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 70V Distribution Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Clipping Eliminator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Power ON Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Remote Power Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Operating Tips Using the pt1250/1800/2400. . . . . . . . . . . . . . . . . . . . . . . . . . 19 In Case of Difficulty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Care and Service Assistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 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. [. . . ] Polarity Loudspeakers must be connected with consistent polarity for correct phasing between them. Incorrect phasing will do no physical harm, but frequency response will be affected. The key is to make sure that both speakers connected to the speaker terminals are hooked up the same way. Connect (­) at the speaker outputs to (­) on the back of the speaker, and (+) at the speaker outputs to (+) on the back of the speaker. 13 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. Clipping Eliminator This circuit prevents the input signal from exceeding the point where it would drive the amplifier into hard clipping. It has no effect on the signal until it reaches the point where clipping would occur. The larger the input signal the more the signal is reduced to keep the output just below clipping. The Clipping Eliminator circuitry is inactive when the unit is shipped from the factory, but can be activated with the Clipping Eliminator Switch located on the front panel. Note: If the Input Level control(s) are turned down far enough, a sufficiently large input signal can drive the input differential amplifier into clipping. The Clipping Eliminator circuit cannot remedy this kind of clipping. Likewise, it has no effect on clipping that occurs prior to the amplifier inputs (at the mixer or equalizer stage, for example). pt1800/2400Installation Location and General Precautions Observe the following precautions when choosing a location for your amplifier. 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. Protect from heat and allow adequate ventilation. Place away from direct sources of heat, such as heating vents and radiators. All components produce some heat during operation, so make sure that the ventilation holes are not covered and that air is allowed to circulate freely behind, beside and above the unit. Excessive heat is the single greatest source of both short-term and long-term component failure. Mechanical Considerations The pt1800 and pt2400 requires three rack space units (5. 25") and a depth of 12. 75" inside the rack, including the rear supports. [. . . ] It will be necessary for warranty service. If your CARVER Professional product should require service, you may contact the CARVER Professional Technical Service Department by calling (503) 978-3363 or by writing to us at the Factory address shown below. We will then direct you to the nearest in our national network of Authorized Warranty Service Centers or give you detailed instructions on how to return the product to us for prompt action. If you should have questions or comments, please write to the Factory address given below. [. . . ]

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