POWER POWER SZ SERIES POWER POWER AMPLIFERS SZ1120 SZ1240 SZ1360
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Safety Instructions/Consignes de sécurité/Sicherheitsvorkehrungen/Instrucciones de seguridad WARNING: To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture. To reduce the hazard of electrical shock, do not remove cover or back. No user serviceable parts inside. Please refer all servicing to qualified personnel.
Table of Contents Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SZ Series Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SZ Series Layout - Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
SZ Series Features POWER The Samson SZ Series power amplifiers have been developed using the latest technology in amplifier design. Here are some of their main features: • Each SZ Series amplifier delivers reliable, clean power operation at 70/100 volts and 4 Ohms, with their rated power output of 120 watts for the SZ1120, 240 watts for the SZ1240 and 360 watts for the SZ1360.
SZ Series Layout - Front Panel 1 2 3 4 5 1 POWER 7 6 1: Handle - For easy transport while carrying, or while rack mounting, the SZ amplifier features two heavy duty, die cast handles located conveniently on the left and right side of the front panel. 2: Fan Vent - The SZ series amplifers stay cool thanks to the forced-air cooling vents. Cool air is drawn through the front panel fan, reducing the temperature of the internal components while forcing the heat out the rear vents.
SZ Series Layout - Rear Panel 1: AC INPUT - Connect the supplied heavy-gauge 3-pin “IEC” power cable here. 2: DC 24V INPUT – A two circuit Euroblock socket is provided for connecting 24 volt emergency back-up power. 3: CONSTANT VOLTAGE (output connector) - Use this Euroblock to connect the amplifier to one of the 25, 70 and 100 volt outputs if you are using a constant voltage system. See page 13 in this manual for more information about wiring and interconnection instructions.
Designing an Installation Plan Designing an Installation Plan If you are a professional installer, you’ll probably want to skip over this section, however if you are setting up your system for the first time, this section can help make your installation a little bit easier. Before you start plugging, stripping and connecting wires, it a good idea to have a clear installation plan.
Designing an Installation Plan Now, take some time to consider where you need to have sound in your particular installation. After you have decided where you need to create sound zones, you can consider your speaker selection, but first decide where you are going to locate your equipment rack. Using Active Speakers In a larger installation, you may use a combination of passive speakers connected to your SZ Series amplifier along with some active, or self powered speakers in a different zone.
Designing an Installation Plan Using A Constant Voltage Speaker System - continued The same principle is applied in constant voltage audio systems where a transformer is connected to the amplifier’s output to step up the voltage while lowering the output current, which allows you to use long runs of lower gauge wire to connect to a series of speakers with step down transformers.
Setting Up and Using Your SZ Series Setting up your SZ Series is a simple procedure which takes only a few minutes: 1. Remove all packing materials (save them in case of need for future service) and decide where the amplifier is to be physically placed—it can be used free-standing or mounted in a standard 19” rack, requiring only two rack spaces.
The SZ Series Protection Circuitry As noted in the “Guided Tour” section of this manual, the SZ Series front-panel Protection LED indicates the activity of the relay speaker connection circuitry. When the Protection LED is lit, this circuitry is active, and all connected speakers are muted.
SZ Series Connections The following diagrams illustrate various wiring set ups for 4 ohm, 8 ohm and 70 Volt operation.
SZ Series System Set Up The following is a typical constant voltage system setup for a small restaurant using four SZ1120 power amplifiers along with an S zone feeding several audio zones with paging and music. The first two SZ amps are connected to four wall-mounted speakers in each of the Dining Rooms with their transformers set to a 25 watt tap. The third SZ amp powers two speakers in the outside Bar area with their transformers set to 50 watt.
SZ Series Input Wiring Guide SZ Series Input Wiring Guide There are several ways to interface the SZ Series amplifers, depending on your exact system set-up. Follow the cable diagrams below for connecting to the input of your amplifier.
SZ Series Output Wiring Guide SZ Series Output Wiring Guide There are several ways to interface the SZ Series amplifers, depending on your exact system set-up. Follow the cable diagrams below for connecting to the output of your amplifier. 4 and 8 Ohm Wiring Guide 25 Volt Wiring Guide 70 Volt Wiring Guide 100 Volt Wiring Guide Follow the guidelines below to select the appropriate size wire based on the distance from the amplifier to the speaker. The wire sizes apply to the 4-ohm tap.
Specifications Specifications Rated Output (at T.H.D 1.0%, 1kHz) SZ1120 SZ1240 SZ1360 120Watt 240Watt 360Watt Gain Control -12dB ~ 0dB Input Sensitivity (at Balanced line) 1.0 ± 0.1Vrms / 10Kohm High-pass Filter(at 400Hz) -3dB Frequency Response +1.5 / -3 dB at 70Hz~18kHz S/N Ratio Better than 90dB T.H.D at 1/2 rated output, 1kHz Less than 1.
Block Diagram 15
Samson Technologies Corp. 45 Gilpin Avenue Hauppauge, New York 11788-8816 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 631-784-2201 www.samsontech.
