Front & Rear Connections, Front Panel

Nady Systems SPA 850 owner manual Front & Rear Connections, Front Panel

FRONT & REAR CONNECTIONS

FRONT PANEL		6
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 INDICATORS
These LEDs illuminate when the power is turned “ON”.
3.	CLIP (PEAK) LED INDICATORS

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. PROTECT LED INDICATORS

These LEDs illuminate if the power amplifier’s output connection is shorted or the load impedance is too low. When either of these LEDs is lit up, turn OFF the power and check the output’s connec- tion to verify that it is correct, then turn ON the power again.

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

6. 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).

BACK PANEL

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.FUSES

Fuse holders for 20A/250V 3AG fuses. If these fuses continuously blow, shut off the unit and have it serviced by qualified service personnel.

9.GROUND LIFT SWITCH

Switch to right to disconnect the chassis from ground if neces- sary to eliminate hum caused by ground loops.

10. 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). A cover plate is provided to ensure that this switch is not accidently reset or tampered with between uses.

SPA 850 specifications

The Nady Systems SPA 850 is a powerful and versatile audio amplifier that caters to a wide range of audio applications, from live performances to installation in venues. This robust product is designed to deliver high-quality sound with remarkable clarity and reliability, making it an excellent choice for musicians, sound engineers, and venue operators.

One of the standout features of the Nady SPA 850 is its impressive power output. With an output of 850 watts at peak performance, it allows users to drive large speakers effectively, ensuring that sound reaches every corner of the space. This makes it ideal for concerts, public speaking events, and theater productions. The amplifier is equipped with built-in protection circuits that safeguard the device against overheating and short circuits, ensuring long-term durability.

The SPA 850 utilizes advanced technology to enhance audio quality. It incorporates a high-efficiency Class D amplifier design, which not only provides exceptional sound fidelity but also contributes to energy efficiency. This means users can enjoy powerful audio performance without excessive power consumption, making it an environmentally friendly option. Furthermore, the low total harmonic distortion ensures that the output sound remains clear and undistorted, even at high volumes.

This unit includes versatile connectivity options to accommodate various audio sources. It is equipped with multiple input channels, including XLR and 1/4-inch inputs, allowing for seamless integration with microphones, instruments, and other audio devices. The adjustable gain controls make it easy to optimize sound levels for different sources, providing flexibility for a wide range of applications.

The Nady SPA 850 also features a compact and durable design, making it suitable for both portable and fixed installations. Its lightweight construction facilitates easy transport, while the sturdy build ensures that it can withstand the rigors of frequent use in various environments.

Additionally, the amplifier is designed with user-friendly controls and indicators, making it accessible even for those new to audio equipment. The straightforward layout allows for quick adjustments, ensuring users can focus on delivering an outstanding audio experience.

In summary, the Nady Systems SPA 850 is a remarkable audio amplifier that combines power, efficiency, and versatility. Its robust features and advanced technologies make it an attractive choice for anyone seeking reliable sound amplification in diverse settings.