Nady Systems SPA 1400 User Manual

AMPLIFIERS

SPA Series

Stereo Power Amplifiers

OWNER’S MANUAL

SPA SERIES

STEREO POWER AMPLIFIER

Offering top power, superior performance and full professional operating features in a roadworthy compact chassis, the SPA Series are perfect for even the most demanding sound reinforcement installation and touring applications.

The operating instruction in this manual are for the SPA850, SPA 1400 and SPA 2400 power amplifiers. The operation and functions of these units are the same, except as noted.

• Continuously variable speed fan with back-to-front air flow

• Full operating features: user-defeatable clip limiter; switchable 30Hz low-cut filter; balanced XLR and 1/4” TRS inputs; detent volume controls; stereo (dual-channel, parallel-input, or bridged mono operating models with selector switch; binding post and Neutrik Speakon™ outputs; ground-lift switch

• Complete, advanced safety/reliability features: soft-start turn on; noise-free on-off; built-in DC offset; independent DC and thermal overload protection on each channel; short circuit and speaker protection; DC servo operation; built-in current limiter

• Parallel outputs allow “daisy chaining” amps

• ~115V (60Hz)/~230V (50Hz) AC select switch

• Clip and Signal LED indicators for each channel

• Durable double rack space (2U) steel casing

• SPA 850 — 2 x 350W @4Ω, 2 x 425W @2Ω Bridge mono: 600W @ 8Ω, 850W @ 4Ω SPA 1400 — 2 x 500W @4Ω, 2 x 800W @2Ω Bridge mono: 1000W @ 8Ω, 1400W @ 4Ω SPA 2400 — 2 x 750W @4Ω, 2 x 1400W @2Ω Bridge mono: 1600W @ 8Ω, 2400W @ 4Ω

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.

Thanks for selecting NADY AUDIO as your choice in amplifiers.

Date of Purchase __________________________________________ Dealer’s Name ____________________________________________ City______________________________________________________ State____________________Zip ______________________________ Model # __________________________________________________ Serial # __________________________________________________

FEATURES ..................................................................3

WARNING....................................................................4

FRONT AND REAR CONTROLS................................5

INSTALLATION............................................................7

CONNECTIONS ..........................................................8

BLOCK DIAGRAM ......................................................10

SPECIFICATIONS ......................................................11

FEATURES

CONTENTS

WARNING

IMPORTANT SAFETY INSTRUCTIONS

When using this electronic device, basic precautions should always be taken, including the following:

1. Read all instructions before using the product.

2. Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a wet basement, or near a

swimming pool, etc.).

3. This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling.

4. This product, in combination with headphones or speakers, may be capable of producing sound levels that

could cause permanent hearing loss. Do not operate for a long period of time at a high volume level or at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult an audiologist.

5. The product should be positioned so that proper ventilation is maintained.

6. The product should be located away from heat sources such as radiators, heat vents, or other devices

(including amplifiers) that produce heat.

7. The product should be connected to a power supply only of the type described in the operating instructions or

as marked on the product. Replace the fuse only with one of the specified type, size, and correct rating.

8. The power supply cord should: (1) be undamaged, (2) never share an outlet or extension cord with other

devices so that the outlet’s or extension cord’s power rating is exceeded, and (3) never be left plugged into the outlet when not being used for a long period of time.

9. Care should be taken so that objects do not fall into, and liquids are not spilled through, the enclosure’s

openings.

10. The product should be serviced by qualified service personnel if:

A. The power supply cord or the plug has been damaged. B. Objects have fallen into, or liquid has been spilled onto the product. C. The product has been exposed to rain. D. The product does not appear to operate normally or exhibits a marked change in performance. E. The product has been dropped, or the enclosure damaged.

11. Do not attempt to service the product beyond what is described in the user maintenance instructions. All

other servicing should be referred to qualified service personnel.

ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR

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.

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.

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.

(Caution: Always turn on your power amplifier last, after all your other connected equipment, and always turn off your power amplifier before your other connected equipment.)

2. POWER LED INDICATOR

This LED illuminates when the power is turned “ON”.

3. CLIP (PEAK) LED INDICATORS

These LEDs illuminate if any section of the power

amplifier’s output are within 3DB of clipping. Occasional blinking of the LEDs are acceptable, but if they remain on more than intermittently you should turn down either the power amplifier’s level controls or reduce the output level of the preceding component to avoid audible distortion.

4. SIGNAL LED INDICATORS

These LEDs illuminate to confirm the presence of an input signal greater than 100 mV at that channel of the amplifier

5. LEVEL CONTROLS

These control the level of signal coming into each channel. The actual voltage gain of the amplifier is shown in dB. Turn these controls counterclockwise if the peak LEDs illuminate steadily (indicating too strong an input signal).

FRONT AND REAR CONTROLS

1 2 3

FRONT P

ANEL

6. CIRCUIT BREAKER

A bimetallic circuit breaker is provided for protection of the amplifier. Press to reset if it trips. If it continuously trips upon resetting, refer servicing to qualified personnel.

7. POWER CONNECTOR

The cord connector is used to connect the AC power source to your power amplifier.

(CAUTION: DO NOT REMOVE THE CENTER GROUNDING PIN.)

8. GROUND LIFT SWITCH:

Switch to right to disconnect the chassis from ground if necessary to eliminate hum caused by ground loops.

9. AC VOLTAGE SELECTOR SWITCH:

Before plugging in the power cord, check to see that the unit is set for the proper voltage for your area: ~115V (60Hz) or ~230V (50Hz). Acover plate is provided to ensure that this switch is not accidently reset or tampered with between uses.

10. L/R CHANNEL OUTPUT CONNECTORS

(Speakon™ & Binding Posts)

The Speakon™ and binding post (banana jack) outputs are compatible with a speaker load of 2 Ω or greater (4Ω or greater for bridged operation). Connections are as depicted on the rear panel and in the following CONNECTIONS section on page 8 of this manual.

REAR PANEL

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