Nady SPA-850 Rackmount Stereo Power Amplifier (350W/Channel @ 4 Ohms)

The Nady SPA-850 is a professional power amplifier that offers reliable performance and terrific versatility in a compact rackmount design. The amplifier can operate in stereo, parallel, or bridged mono modes to meet the demands of a variety of applications.

It offers XLR and 1/4″ TRS inputs along with Neutrik Speakon and binding post outputs, allowing you to connect to a wide variety of sound devices and systems. Parallel output connectors let you daisy-chain multiple amplifiers for additional power. In order to deliver the best sound and reliability possible, the amplifier is equipped with a ground-lift switch and a 30Hz low-cut filter to eliminate low frequency hum. A defeatable clip limiter prevents audio from distorting.

A complete array of protection circuitry includes a soft-start turn on, noise-free on/off, DC offset, DC and thermal overload protection, DC servo operation, short circuit and speaker protection, and a current limiter. All of these functions protect your amplifier and your speakers from damage and keep them operating smoothly. A variable-speed cooling fan with back-to-front airflow keeps internal components from overheating.

FEATURES:

Durable steel chassis fits in a standard equipment rack

Switchable stereo, parallel, and bridged mono modes meet the demands of a variety of applications

XLR and 1/4″ TRS inputs, along with Neutrik Speakon and binding post outputs allow you to connect to a wide variety of sound devices and systems

Parallel output connectors let you daisy-chain multiple amplifiers for additional power

Detented volume controls let you make precise adjustments

A ground-lift switch and a 30Hz low-cut filter eliminate low frequency hum

A defeatable clip limiter is provided to minimize distortion

Clip and signal LED indicators on each channel

Protection circuitry includes a soft-start turn on, noise-free on/off, DC offset, DC and thermal overload protection, DC servo operation, short circuit and speaker protection, and a current limiter. All of these functions protect your amplifier and your speakers from damage and keep them operating smoothly

A variable-speed cooling fan with back-to-front airflow keeps internal components from overheating

Switchable 115/230VAC power for international use

SPECIFICATIONS:

Power Rating:

425W @ 2 Ohms

350W/Channel @ 4 Ohms Stereo

200W/Channel @ 8 Ohms Stereo

600W @ 8 Ohms Bridged

850W @ 4 Ohms Bridged

Input Sensitivity: 1.15V (+3.4dBu)

Input Impedance: 10 kOhms, Balanced and Unbalanced

Gain: 30dB

Frequency Response: 25Hz – 25kHz +0/-1dB

Signal-to-Noise Ratio: 100dB

Total Harmonic Distortion (THD): < 0.03%

Input Connectors:

2 x XLR Inputs

2 x 1/4″ TRS Inputs

1 x AC Power Input

Output Connectors:

2 x Neutrik Speakon Outputs

2 x Binding Post Outputs (2 Terminals Each)

Controls Front Panel:

1 x Power Switch

2 x Detented Volume Control Knobs

Controls Rear Panel:

1 x Mode Selector Switch

1 x Ground-Lift Switch

1 x Voltage Selector Switch

1 x Clip Limiter Switch

1 x LF Filter Switch

Indicators:

1 x Green Power LED

2 x Green Signal LEDs

2 x Red Clip LEDs

Cooling: Variable-Speed Fan, Back-to-Front Airflow

Protection:

Full Short Circuit, Open Circuit, Thermal, Ultrasonic, and RF

Protection; Stable into Reactive or Mismatched Loads; On/Off

Muting; Current Limiter (Crowbar)

Power Requirements:

110-120VAC or 220-240VAC, 50/60Hz

11A Fuse

Dimensions: 19 x 15.7 x 3.5″ (483 x 400 x 89mm)

Weight: 29.9 lbs (13.6kg)