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Nady SPA 850 Pro Stereo Power Amplifier

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Product 482049
Product Price $0.00
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The Nady SPA 850 Pro Stereo Power Amp has a power rating of 350W/ch @ 4 ohms, 425W @ 2 ohms. Bridged mono: 600W @ 8 ohms, 850W @ 4 ohms. The Nady SPA...Click To Read More About This Product

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Perfect for even the most demanding installation and touring applications.

The Nady SPA 850 Pro Stereo Power Amp has a power rating of 350W/ch @ 4 ohms, 425W @ 2 ohms. Bridged mono: 600W @ 8 ohms, 850W @ 4 ohms. The Nady SPA 850 includes a continuously variable-speed fan with back-to-front air flow, user-defeatable clip limiter, switchable 30Hz low-cut filter, balanced XLR and 1/4" TRS inputs, detent volume controls, stereo or bridged mono operation, binding post and Neutrik Speakon outputs, and ground-lift switch. Amplifier protection features include soft-start turn on, noise-free on/off, built-in DC offset, independent DC and thermal overload protection, short circuit and speaker protection, and built-in current limiter. Parallel outputs allow daisy chaining. Clip and signal LED indicators for each channel. Durable steel casing. 2 rackspaces.

  • 350W/ch @ 4 ohms, 425W @ 2 ohms. Bridged mono: 600W @ 8 ohms, 850W @ 4 ohms
  • Continuously variable-speed fan with back-to-front air flow
  • User-defeatable clip limiter
  • Switchable 30Hz low-cut filter
  • Balanced XLR and 1/4" TRS inputs
  • Detent volume controls
  • Stereo or bridged mono operation,
  • Binding post and Neutrik Speakon outputs
  • Ground-lift switch
  • Soft-start turn on
  • Noise-free on/off
  • Built-in DC offset
  • Independent DC and thermal overload protection
  • Short circuit and speaker protection,
  • Built-in current limiter
  • Parallel outputs allow daisy chaining
  • Clip and signal LED indicators for each channel
  • Durable steel casing
  • 2 rackspaces

Review Snapshot

by PowerReviews

(based on 10 reviews)

Ratings Distribution

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Reviewed by 10 customers

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It's cheap and it works!

By 60srocker

from The Heart of Dixie

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What can I say? It amplifies! It sounds good! It's loud! It was cheap!



By Tommy MidNight

from Lancaster,PA

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Good quality Amp. Good sound for live performance.GOOD JOB NADY AUDIO!!!


has good sound quality

By Southern Thunder

from Cutler, IL

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The fan runs backward but still seems to do the job, though be a problem when installed in a rack.


Great Sound For the Money

By Adam Hjermenrud

from Louisville KY

I have had this amp for 6 years and aside from some noise in the volume controls (Expected, and who uses them anyway?) this amp has proformed right along side much more expensive amps (a Peavey is in the rack above, and a Phonic 2500 & 1500 below) I has been abused, overheated, overworked, and under ohmed and still does not hesitate to perform this amp is not as transparent as some (hissing with no signal) but certainly gets the job done. This unit is perfect for the working band on a budget.


Good solid amp

By shreddman

from Rocky Mtns

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I've had it a year, and I can really depend on it. Never even staticed or crackled, clean controls, good selection of modes. Tough unit; a little big/heavy, but - for this amount of money, it's way better than what else is out there, and to me, just as good as the ones that cost a lot more. I'd have Crowns if EMG would return my phone calls, but for a workin' guy, this thing is great.


Autoramp feature is excellent, best amp I have!

By Rockin-Ron H.

from Chesapeake, VA

This is great power for the dollar. Nady has included many of the professional features needed in today's amplifier products. I use the 2-ohm per side stereo mode to power four 4-ohm subs. I do not know about other Nady amps, but this one is a winner!


Road Use, high school band promotion use.

By Dan-D_reN

from cincinnati, OH

I have used this thing for every type of gig imaginable, and it has preformed well. I would recomend using the Speak-on connections over the bannanna clips, its a little more expensive, but saves a crap load of money on bent clips in the long run. The amp has been veaten to hell and back, and it hasnt died yet. It surged once (my fault)and blew a fuse or 2. that is my only negative responce is placement and ease of taking the housing off.


Really great buy!!!

By Roy Schryver

from old lyme, CT

I was so surprised at how good this amp was. I am a music teacher and need a reliable, durable product because I use it daily. Nice sound!


Good on a budget

By StvUndef

from Bel Air MD

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I needed 2 new amps to go with my 2 CE1000?s. I couldn?t afford 2 more crowns, but theses are half as much as a CE1000. I am using one bridged mono for the 15? on my mains. Half of the other is driving my horns, and the other half my monitors. This amp can take a 2-ohm load without a sweat. I was worried when the manual said the airflow was back to front, thinking this would mess up my rack with the CE1000?s, but they actually go air in the front, out the back. Overall a good amp for the price.


Withstands the Test of Time

By Thamusicdoctor

from Shasta Lake, CA

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I have used this amplifier for the last three years as a mobile DJ. I have two of them (one for satellites and one for the subs). I just ordered two PR15 Peaveys and will be eager to see how the Nady powers them. These Amps are 110 percent reliable and sound awesome. Not one problem in the three years I have had them.

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