User manual PARASOUND HCA806A

[. . . ] O W N E R ' S M A N U A L HCA-80 6A Si x Channel High Current Power Ampl if ier i Amplifier HCA-806A High Current Mult Current Overload Power 1 2 3 4 AC Line 5 Standby 6 Normal -1- Table of Contents Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure #1 and #2 HCA-806A Front and Rear Panel Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Installing and Rack Mounting Your Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] If you are using your HCA-806A in the six channel mode, we suggest the following progression of channel priorities. This is an easy way to remember what you connected to each channel for setting levels or troubleshooting: Recommended Input Connections for Six Channel Operation Use INPUTS 1 and 2 for your front left and right channels Use INPUTS 3 and 4 for your left and surround right channels Use INPUTS 5 for your center channel Use INPUTS 6 for your passive subwoofer Switch Settings for Six Channel Operation: Leave LOOP 1/2 > 3/4 and LOOP 1/2 > 5/6 switches in their OFF positions and both MONO BRIDGE switches in their SEPARATE positions. Four and Five Channel Operation In addition to six channel operation, you can use your HCA-806A in a variety of other configurations depending upon your needs. Spade Lugs If you prefer to use speaker cable with spade lugs, make sure you do not permit the lug to rotate as the terminal is tightened. The limited warranty does not cover terminals that are sheared off as a result of overtightening. Bare Wire If you use bare wire without plugs, be sure to strip off only enough insulation so the bared wire fits into the hole that runs sideways through the terminal's metal shaft. Before inserting the wire, twist all its strands tightly to prevent strays that could cause a short circuit between + and -- terminals or adjacent channel terminals. If you have a soldering iron, it is a good idea to "tin" the bare wire with solder to keep it from unraveling and to prevent oxidation. -7- Mono Bridging -- Channels 3+4 and 5+6 When you bridge channels 3+4 and/or 5+6, your speakers are connected to the bridged channels differently. You bridge by using the red + terminals of the adjacent channel pairs only. Note that bridged connections are made horizontally rather than vertically and that the upper red + terminals have separate markings for bridging. In the bridged mode, channel 4 (and/or 6) output is positive and channel 3 (and/or 5) output is negative. Unbridged speaker connections can be made with standard 3/4" (19 mm) dual banana plugs. However internal space required by the high current protection relays prevent the bridged terminal pair spacing to be close enough to accept 3/4" (19 mm) dual banana plugs. Single banana plugs, spade lugs, or bare wire termination are required. Select MONO BRIDGING (up) or SEPARATE (down) as marked on the rear panel. If you accidentally leave either switch in the mono bridge position, the stereo output will be very weak and distorted. For bridged operation of channels 3+4, use only the input jack and level control for channel 4. For bridged operation of channels 5+6, use only the input jack and level control for channel 6. Minimum Impedance Precautions You may connect loudspeakers with a 4 or 8 nominal impedance for unbridged operation. Your HCA-806A is capable of driving speakers with occasional impedance dips well below 2 . However, Lower nominal impedance loads are not recommended and may cause overheating. The HCA-806A is designed for a minimum 8 nominal impedance for each speaker connected to bridged channels 3+4 or 5+6. [. . . ] We suggest you contact your authorized Parasound Dealer or Installer, or call Parasound Technical Service if you suspect a problem. We may be able to suggest other diagnostic tests you can easily perform yourself and which will save you a lot of trouble. If it is determined that the HCA-806A should be returned to Parasound for inspection and possible servicing, you must first call or write to obtain a Return Authorization number. You will also be asked to repack the unit in its original packing and both of its cardboard cartons for proper protection in transit. [. . . ]