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Nady (SPA-850) 850W Power Amplifier



 | Catalog #: 55022693


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Product Summary

Amp up your performance.

Complete your stereo system with a terrific amplifier. Offering top power, quality performance and full professional operating features in a roadworthly compact chassis, the SPA-850 is perfect for even demanding sound reinforcement installation and touring applications. Take full advantage of 2x350W of power at 4ohms, 2x425W of power at 2ohms, with a bridged mono of 600W at 8ohms and 850W at 4ohms.

  • Enjoy XLR and 0.25" TRS inputs with switchable 30Hz low-cut filter and detent volume controls
  • DC/thermal overload protection, short circuit and speaker protection on each channel for security
  • Continuous, variable-speed fan helps keep your system cool
  • LED channel indicators provide easy output monitoring
Pricing and availability: Please note that all prices are subject to change without prior notice. Prices advertised on this site are for online orders only. Prices on some items may differ from those advertised in RadioShack stores. All merchandise may not be available at all stores, and all stores may not participate in all sales promotions. We recommend you contact the store to confirm product availability and price.


Usually ships in 1 - 3 business days

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Other ways to get it

By phone: 1-800-843-7422

Manufacturer Warranty

  • Parts: 12 month
  • Labor: 12 month
Tech Specs

Customer Reviews


by PowerReviews
Nady (SPA-850) 850W Power Amplifier

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 3 customers

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Displaying reviews 1-3

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(2 of 2 customers found this review helpful)


works for me !!!

By Dejae Ford

from Columbia, sc

About Me Gearhead, Practical


  • Durable
  • Easy to Install
  • Easy To Use


    Best Uses

      Comments about Nady (SPA-850) 850W Power Amplifier:

      i am using 2 chained emulators for guitar and it runs to my 400watt carvin 4 x 12 cab and my 3way 400watt monitor. VERY LOUD even in a 20 x 20 room with drums, bass, and vocals... and we play METAL..

      i never turn it up past 5 or 6 to get the volume i need.

      (3 of 3 customers found this review helpful)


      would not buy........

      By frank

      from saint louis, missouri

      About Me Practical


      • Easy To Use


      • Poor Performance

      Best Uses

        Comments about Nady (SPA-850) 850W Power Amplifier:

        nady usually makes really good products....however, someone must of been sleeping on the job... remember, if you want some real powerful your research...

        (5 of 8 customers found this review helpful)


        what happened to the good old radioshack

        By crazy cork

        from sw nys

        About Me Auto Professional


        • None


        • Poor Performance
        • Rms wattsmy donkey

        Best Uses

        • Paper Weight

        Comments about Nady (SPA-850) 850W Power Amplifier:

        it won't power my 901s
        nor my klh
        my old out of date 60w fish has more power.
        sounds like an old fashion hand held transistor radio when hooked to some cheap speskers that they managed to meekly power.
        i even bridged it and what a disappointment

        Displaying reviews 1-3

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