AMPLIFIERS OWNER’S MANUAL SPA Series Stereo Power Amplifiers
SPA SERIES STEREO POWER AMPLIFIER Congratulations on your choice of stereo power amplifiers — you have purchased one of the finest stereo amplifiers on the market today. This unit was developed using the expertise of professional sound engineers and working musicians. You will find that your new NADY AUDIO SPA 850/1400/2400 has superior performance and greater flexibility than any other amplifiers in its price range. Please read this manual carefully to get the most out of your new unit.
WARNING An equilateral triangle enclosing a lightening flash/arrowhead symbol is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure which may be of sufficient magnitude to constitute a risk of electric shock. ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR An equilateral triangle enclosing an exclamation point is intended to alert the user to the presence of important operating and service instructions in the literature enclosed with this unit.
FRONT AND REAR CONTROLS 4 1 2 3 1 FRONT PANEL 5 1. POWER SWITCH To turn the unit ON or OFF, press the upper or lower portion of this button. Before turning on the amplifier, check all connections and turn down the level controls. A momentary muting is normal when turning the amplifier on or off. amplifier’s output are within 3DB of clipping.
FRONT AND REAR CONTROLS (Note: Do not use both unbalanced and balanced cables in the same set-up as that can unbalance all the connections when daisy-chaining, resulting in hum.) 11. BALANCED INPUT CONNECTORS (1/4” TRS & XLR) These 1/4” (6.3mm) TRS (Tip/Ring/Sleeve) phone jacks and XLR jacks are compatible with balanced inputs and are wired as Tip/Pin 3 = (+), Ring/Pin 2 = (-), and Sleeve/Pin 1 = Ground. Normal maximum input level at clipping is 1.15V RMS (+ 4dB). Input impedance is 10K Ohms.
INSTALLATION Rack Mounting The SPA Series amplifiers are designed for standard 19” rack mounting as well as “stack” mounting without a cabinet. Use 4 screws and washers for mounting to the front rack rails. It is also a good idea to support the amps also in the rear, especially for mobile use where the amps will be subjected to shocks. Internal Fuses for SPA 850/1400 Amplifier Cooling Also pay close attention to the cooling requirements.
CONNECTIONS The following instructions describe the most common ways to install your amplifier into a sound system. 1. Turn off the amplifier power switch before making any connections. 2. The SPA Series amplifiers maybe operated in one of three modes (stereo, bridged-mono, and parallel mono). Refer to the following wiring diagrams for the speaker connections you wish to make.
CONNECTIONS • Parallel (Mono) Mode To put the amplifier in parallel-mono mode, first turn the amplifier off, then slide the mode selector switch (13) to the left “PARALLEL (MONO)” position and properly connect the input/output wiring as shown. A signal into any input jack will drive both channels directly. You can patch the input signal on to any other amps suing any of the remaining input jacks. (Note: Do not connect a speaker load less than 2 ohms as it can damage your amplifier.
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SPECIFICATIONS POWER SPECIFICATIONS SPA 850 SPA 1400 SPA 2400 2Ω 425 800 1400 EIA out power 4Ω 350 + 350 500 + 500 750 + 750 1Hz, THD maximum 1% 8Ω 200 + 200 300 + 300 500 + 500 Bridged 8Ω 600 1000 1600W 4Ω 850 1400 2400 Both channels ELECTRICAL SPECIFICATIONS SPA 850 SPA 1400 SPA 2400 INPUT SENSITIVITY 1.15V (+3.4dBU) 1.15V (+3.4dBU) 1.
SERVICE FOR YOUR NADY AUDIO PRODUCT (U.S.) Should your NADY AUDIO product require service, please contact the Nady Service Department via telephone at (510) 652-2411, or e-mail at service@nadywireless.com. (International) For service, please contact the NADY AUDIO distributor in your country through the dealer from whom you purchased this product. DO NOT ATTEMPT TO SERVICE THIS UNIT YOURSELF AS IT CAN BE DANGEROUS AND WILL ALSO VOID THE WARRANTY. NADY SYSTEMS, INC.
