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Introduction
Thank you for purchasing the SZ240 and SZ480 constant voltage power amplifiers from Samson
Technologies! The Samson SZ Series amplifiers have been designed to provide robust, clean output with
low distortion and wide dynamic range, along with the dependability demanded by the most profes-
sional design engineers and audio installers. The two-channel SZ240 and the four-channel SZ480 are both
enclosed in a convenient 2 rack-space chassis and feature highly efficient Class D power cores with univer-
sal power supplies that operate from 100 – 240 volts, at 50 or 60 Hz. Each of the SZ amp channels reach full
power of 120 watts at 4 ohms, but they can also run at 70 or 100 volts thanks to their internal, high perfor-
mance, toroidal matching transformers. Front panel controls and displays include a Power switch with LED
indicator, as well as independent channel input level controls. The SZ amplifiers include front panel Signal,
Peak and Protection LED indicators to help you set the correct operating levels. Plus, the SZ amplifiers
include a selectable Limiter on each channel to help guarantee a clean signal. Euro block input and output
connectors are provided to insure easy connections and maximum flexibility. To keep the SZ amplifiers
running cool, their designs employ internal wind tunnels with forced-air cooling via an internal fan, which
greatly reduces the chance of thermal and overheating problems. Multi-stage protection for power-up, over-
heating, over-current, short circuit, low output impedance and DC voltage, assures high reliability under
the most demanding situations. The SZ amps are road tough with their all steel chassis, 19-inch rack mount
design and convenient carry handles facilitating easy installation in any rack. Optimized for commercial
installations, houses of worship, live sound venues and for driving small and medium-sized live PA systems,
the SZ amplifiers will deliver reliable power. The SZ series’ advanced technology, clear sound and reliable
performance makes them ideal for any small PA or any distributed sound system installation.
In this manual, you’ll find a detailed description of the features of the SZ Amplifiers, as well as a guided tour
through the front and rear panels, step-by-step instructions for using the unit, suggested applications and
full specifications.
You’ll also find a warranty card enclosed—please don’t forget to fill it out and mail it so that you can receive
online technical support and so we can send you updated information about other Samson products in the
future. Also, be sure to check out our website (www.samsontech.com) for complete information about our
full line of Samson audio products.
With proper care and adequate air circulation, your SZ amplifer will operate trouble free for many years. We
recommend you record your serial number in the space provided below for future reference.
Serial number: _______________________________
Date of purchase: _____________________________
Should your unit ever require servicing, a Return Authorization number (RA) must be obtained before ship-
ping your unit to Samson. Without this number, the unit will not be accepted. Please call Samson at 1-800-
3SAMSON (1-800-372-6766) for a Return Authorization number prior to shipping your unit. Please retain the
original packing materials and if possible, return the unit in the original carton and packing materials. If you
purchased your Samson product outside the United States, please contact your local distributor for warranty
information and service.
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