User manual PARASOUND HCA3500

[. . . ] O W N E R ' S M A N U A L HCA-3500 Ultra High Cur rent Power Ampl if ier t Power Amplifier HCA-3500 Ultra High Curren Power Left Power Right Designed in California by John Curl -1- Table of Contents Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure #1 HCA-3500 Front and Rear Panel Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Ventilation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] DO NOT RESTRICT ADEQUATE VENTILATION. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN Fuse T15A/250 V Power Consumption: 1200 W AC 120V 50/60Hz Power Consumption: 1200 W Fuse T15A/250 V Main Power Fuse Carry Handle IEC AC Cord Connector -4- Introduction Congratulations on your purchase of this precision audio component and thank you for your selection of Parasound. Your Parasound HCA-3500 was designed by renowned circuit designer John Curl and is built using only the finest precision components available for optimum musical quality and performance. Each channel of the amplifier has its own power supply including an independent 1. 4 kVA toroidal power transformer and 97, 600 uF of filter capacitance. This dual-mono configuration provides the high levels of power needed for some of today's more sophisticated speaker systems. The inherently low output impedance of the HCA-3500 easily maintains control of your loudspeakers even during demanding impedance variations. Unique circuit topology of the direct coupled HCA-3500 includes balanced JFET input transistors, MOSFET drivers and ultra high current output devices. The output delivers a generous 15 watts of pure class A operation. Additionally, there are no inductors or capacitors in the signal path. These design refinements reduce high odd-order harmonic distortion, improve overall clarity and preserve low-level musical details. Please take a few moments to read these instructions so that you may fully understand the capabilities of your new Parasound power amplifier. Unpacking Your HCA-3500 Carefully unpack your amplifier and remove all the enclosed accessories. These accessories include two 12 AWG AC cords, rack mount hole plugs, and this manual. Be sure to inspect the unit for any possible shipping damage. If you see any, contact your Parasound Dealer immediately. Save all the packing material in case you need to ship the amplifier for repair. Before you proceed, find the serial number located on the rear panel of your amplifier and record it here for reference: Serial #____________________ Date of Purchase____________________ Installing Your HCA-3500 Locate your amplifier away from heat sources such as air ducts and radiators. Always mount the amplifier horizontally and make sure that your cabinet or shelf can support its weight. It is best to provide a separate shelf for your amplifier rather that stacking it directly above or below your other components. The HCA-3500 occupies four rack spaces (7") in a standard 19 inch equipment rack. When rack mounting the HCA-3500, have someone help support the unit while you bolt the component to the rack rails. Be sure to use heavy duty mounting bolts and nylon shoulder washers on both sides of the faceplate to avoid scratching the amplifier's front panel and also to help prevent ground loops. Contact Middle Atlantic Products at (201) 839-1011 to obtain any additional rack mounting hardware you may need. -5- Ventilation Requirements To insure safe and reliable operation, it is very important that the amplifier has plenty of ventilation to prevent overheating and automatic shut down from its thermal protection circuitry. [. . . ] To avoid the risk of electric shock, do not remove the top cover. The amplifier's exterior can easily be cleaned with a soft cloth moistened only with a few drops of water or glass cleaner. Main Power Fuses There is an external fuse for each channel on the rear panel. These fuses protect the unit from possible damage to internal parts. [. . . ]