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

B&H # NASPA850 Mfr # SPA 850
Usually ships in 7-14 business days

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This is a special order item. Est. arrival at B&H is 7-14 business days (subject to availability). Your order will be charged at the time of shipment.

International Orders*
For international orders, credit cards will be charged at time you place your order.

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Not eligible for free Expedited Shipping
You Pay: $217.49
Product Highlights
  • Rackmount Chassis
  • Stereo, Parallel, and Bridged Mono Modes
  • XLR and 1/4" Inputs
  • Speakon and Binding Post Outputs
  • Daisy-Chain Capability
  • Ground-Lift Switch
  • Clip Limiter and Low-Cut Filter
  • Protection Circuitry
  • Variable-Speed Cooling Fan

The SPA 850 from Nady 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.

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
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 (WxDxH) 19 x 15.7 x 3.5" (483 x 400 x 89mm)
Weight 29.9 lbs (13.6kg)
Nady SPA 850 Rackmount Stereo Power Amplifier (350W/Channel @ 4 Ohms)
  • Power Cord
  • 1-Year Limited Warranty
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