User manual SMART DEVICES SR 230

[. . . ] 2 Follow all operating and use instructions. 3 Remove power from this product before cleaning. 4 Use only a slightly damp cloth for cleaning. 5 To avoid potential fire and shock hazards, do not use this product near water or damp places. [. . . ] 8 Copyright 2001 by SMART Devices, Inc. 5945 Peachtree Corners East Norcross, GA 30071-1337 1-800-45-SMART or 770-449-6698 Part of the patented circuitry in this amplifier is utilized under license from Peter Hochstein. This product has a serial number located on the bottom. Please record this serial number for your records. SERIAL # _______________ 3 INTRODUCTION The SMART SR 230 and 2X150 are premium quality MOSFET amplifiers designed for those who demand the very best. Constructed of the finest materials and with superior American craftsmanship, these amplifiers will provide the best audio amplification with a long and trouble free life. The Model SR 230 is a hybrid design utilizing a 6922 dual triode valve input stage driving the amplifier modules. The sweet sound of tubes combined with the legendary MOSFET output stage makes music come to life. The Model 2X150 is the same amplifier without the valve input stage. For those who prefer a more neutral character without the tube sound, this is the amplifier of choice. Both models are rated at 150 Watts per channel at 8 Ohms, and 240 Watts per channel at 4 Ohms. In addition, Mono Bridged operation is built in, and in this mode, the amplifier will deliver 500 Watts into a single 8 Ohm load. If you have difficulty inserting wires into the post holes, simply remove the fuse holder caps temporarily to obtain more room in which to work. Mono Bridge Switch Power Fuse Speaker Fuses Ground Lift Switch Line Inputs Power Connector Amplifier Outputs Input Level Controls 5 OPERATION POWER SWITCH The ON/OFF rocker switch is located on the lower right area of the front panel. It is an illuminated switch which lights when turned on. Built-in inrush current limiting prevents heavy current surges during turn on. LED INDICATORS LED level indicators, 4 per channel, are near the lower left area of the front panel. These give an indication of the power levels being delivered to the speakers. The green LED's come on at very low signal levels and serve to indicate signal presence. The next 2 LED's up are set to come on at approximately 5 Watts and 50 Watts. The top red LED's are set to come on when peak levels approaching 150 Watts are achieved. These levels are calibrated for 8 Ohm loads and are designed to indicate properly for program material rather than test measurement signals. SETTING INPUT LEVELS This amplifier has input level controls on the back panel. In most cases these will be turned all the way up. [. . . ] If you have any connections to other equipment from the speaker connection (not likely, but possible) you will have to disconnect the other equipment when using MONO BRIDGED operation. Use ONLY the Channel 1 input for MONO BRIDGED mode and turn the Channel 2 Input Level Control all the way down (counterclockwise). 6 Connecting a Speaker for Mono Bridged Operation Note that only the + output posts are used + 1 FUSES + 2 - Replace fuses only with the types and ratings indicated. The power fuse is a slow-blow type such as a MDL8, 250 Volt fuse or equivalent. [. . . ]