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SZ SERIES
POWER AMPLIFERS
SZ1120
SZ1240
SZ1360
POWER
POWER
POWER
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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 ATTENTION: Pour éviter tout risque d’électrocution ou d’incendie, ne pas exposer or moisture. To reduce the hazard of electrical shock, do not remove cover or back. cet appareil à la pluie ou à l’humidité. Pour éviter tout risque d’électrocution, ne No user serviceable parts inside. Please refer all servicing to qual
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Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SZ Series Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SZ Series Layout - Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 SZ Seri
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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
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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. • Built-in 70/100 volt output transformers with flat frequency response from 70Hz to 18kHz provide constant voltage
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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. 3: Protection
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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. 4: LOW-Z (outp
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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. To create your installation plan, you need to consider sev- eral design parameters including what sound sources
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Designing an Installation Plan Now, take some time to consider where you need to Using Active Speakers have sound in your particular installation. After you In a larger installation, you may use a combination of have decided where you need to create sound zones, passive speakers connected to your SZ Series amplifier you can consider your speaker selection, but first along with some active, or self powered speakers in a decide where you are going to locate your equipment different zone. When u
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Designing an Installation Plan Using A Constant Voltage Speaker System - continued Another example is connecting four of the Samson The same principle is applied in constant voltage dB300i with the transformers wired for 25 watts to audio systems where a transformer is connected to the each channel of the SZ Series amplifier. amplifier’s output to step up the voltage while lowering the output current, which allows you to use long runs of Following the wiring diagram on the rear of the lower
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Setting Up and Using Your SZ Series 4. If you are using outdoor horn speakers, switch on the High Setting up your SZ Series is a simple procedure which takes Pass Filter. only a few minutes: HPF 1. Remove all packing materials (save them in case of need 400Hz for future service) and decide where the amplifier is to be OFF ON physically placed—it can be used free-standing or mounted in a standard 19” rack, requiring only two rack spaces. When 5. On the rear panel of the SZ Series, turn t
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The SZ Series Protection Circuitry As noted in the “Guided Tour” section of this manual, the SZ Series front-panel PROTECT 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. CLIP The following conditions will cause the Protection LED to go on: -20 dB • Initial power-up: For approximately five seconds after initial power-up, the protec- tion circuitry is activated an
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SZ Series Connections The following diagrams illustrate various wiring set ups for 4 ohm, 8 ohm and 70 Volt operation. 8 Ohm 8 Ohm 4 Ohm 4 Ohm 8 Ohm Operation (One 8 Ohm speaker per amplifer) 4 Ohm Operation (Two 8 Ohm speakers per amplifer) 70 Volt Operation (Four speakers per amplifer with their line transformers set to 25 watt) 10
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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. (The db300i's are specially treated so they'r
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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. Male XLR to Female XLR (balanced) Hot (2) Hot Hot Hot (2) Common (1) Common Common Common (1) 2 1 1 2 1 2 2 1 3 3 3 3 End View Solder Points Solder Points End View Cold Cold (3) Cold Cold (3) Female XLR Male XLR Male XLR to 1/4-inch (Balanced) Male XLR to1/4-i
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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. Distan
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Specifications Specifications Rated Output (at T.H.D 1.0%, 1kHz) SZ1120 120Watt SZ1240 240Watt SZ1360 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 1.0% Cooling Variable speed fan Operating Temperature/Humidity 0°~40°C at 95% non-condensing Power Consumptions at full power SZ1120 185W SZ12
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Block Diagram 15
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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.com
