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Introduction
Thank you for purchasing the SZ series 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 professional design engineers
and audio installers. This manual covers three SZ series models, the SZ1120, the SZ1240 and the SZ1360. All
of the models are single channel amplifiers with the SZ1120 reaching full power of 120 watts at 4 ohms, the
SZ1240; 240 watts at 4 ohms, and the SZ1360; 360 watts at 4 ohms. The amplifiers can also run at 25, 70 or
100 volts thanks to their internal, high performance matching transformers making them ideal solution for
Constant Voltage systems. The SZ series are enclosed in a convenient 2 rack-space chassis and feature reli-
able linear amplifier design. Rear panel controls include input Level Adjust from –12 to 0 dB and a High Pass
Filter at 400Hz to use with announcement horn speakers. A front panel Signal, Peak and Protection LED indi-
cators to help you set the correct operating levels. Standard XLR Input and Link connectors, plus Euroblock
speaker output connectors are provided to insure easy connections and maximum flexibility. To keep the
SZ series amplifiers running cool, their designs employ internal wind tunnels with forced-air cooling via an
internal fan, greatly reducing 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 series amplifiers 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 including schools, houses of worship, office buildings and live sound
venues, the SZ series amplifiers will deliver reliable power. The SZ Series’ advanced technology, clear sound
and reliable performance makes them ideal for any small public address or distributed sound system instal-
lation.
In this manual, you’ll find a detailed description of the features of the SZ series amplifers, 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 series 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.