QSC RMX 850 Power Amp  

Item #: 
127474181760971464
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The QSC RMX 850 Power Amp combines their rugged high-output designs with the latest circuit technology to deliver unmatched performance at a breakthrough price. The RMX amps require only 2 rackspaces ... Click To Read More About This Product

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Overview

The QSC RMX 850 Power Amp combines their rugged high-output designs with the latest circuit technology to deliver unmatched performance at a breakthrough price. The RMX amps require only 2 rackspaces and feature 1/4" TRS, XLR, and barrier strip balance inputs; binding post and Neutrik Speakon outputs; front-mounted gain controls for easy access; independent and defeatable clip limiters; selectable low-frequency filters (30Hz or 50Hz) that protect speakers and increase headroom; signal and clip LED indicators; independent DC and thermal overload protection on each channel; variable-speed fan. The RMX850 delivers per channel: 200W @ 8 ohms, 300W @ 4 ohms, 430W @ 2 ohms. Bridge mono: 600W @ 8 ohms, 830W @ 4 ohms. 3-year warranty.

Features
  • Unmatched performance at a breakthrough price
  • Requires 2 rackspaces
  • 1/4" TRS, XLR, and barrier strip balanced inputs
  • Binding post and Neutrik Speakon outputs
  • Front-mounted gain controls for easy access
  • Independent and defeatable clip limiters
  • Selectable low-frequency filters (30Hz or 50Hz)
  • Signal and clip LED indicators
  • Independent DC and thermal overload protection
  • Variable speed fan
  • Stereo: 200W @ 8 ohms
  • Stereo: 300W @ 4 ohms
  • Stereo: 430W @ 2 ohms
  • Customer Reviews
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Review Snapshot

by PowerReviews
QSCRMX 850 Power Amp
 
4.8

(based on 32 reviews)

Ratings Distribution

  • 5 Stars

     

    (27)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

Most Liked Positive Review

 

Great Amps

We have a couple of them in our system driving a combination of EV's and various other speakers in and around the sanctuary and they have never failed. Very reliable. Sunday service often has...Read complete review

We have a couple of them in our system driving a combination of EV's and various other speakers in and around the sanctuary and they have never failed. Very reliable. Sunday service often has lots of music. Some times it's the choir, a New Orleans jazz band, prerecorded music, piano, quintets, quartets, it doesn't seem to matter. This amp handles it flawlessly.

VS

Most Liked Negative Review

 

What clip limiters? This blew a good speaker

I ran this through a pair of JBL SF-15's, and all I have to say is, my god does this machine clip! It blew out the horn in one of the...Read complete review

I ran this through a pair of JBL SF-15's, and all I have to say is, my god does this machine clip! It blew out the horn in one of the speakers. DO NOT BUY!

Reviewed by 32 customers

Displaying reviews 1-10

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(4 of 4 customers found this review helpful)

 
5.0

QSC for life!

By Sir Oaf

from Oregon

Comments about QSC RMX 850 Power Amp:

I own two of the RMX850's for 5 years now, and they sound just as good as the day I bought them. Never had ANY problems or letdowns, nothing. Truly a product for life, and a customer for life to!!I use them from DJing to home use, on to speaker testing. These things are strong right to clip, and will play at light clip all day long. Besides, there built like a tank!!

(2 of 2 customers found this review helpful)

 
5.0

Great amp

By neilsnow

from Vermont

Comments about QSC RMX 850 Power Amp:

This thing kicks. I have had it for 2 years and have had no problem. I have tested it as a main driver, monitor driver, and sub driver and it has passed them all with flying colors. It has amazing clarity, great punch, and keeps on going under harsh conditions. I have ran it with the clip limiter flashing full and it won't shut off. Great feature is the selectors on the back, which allow you to switch filter settings and mode settings. This is a great amp. thanks QSC for producing a great amp at such an affordable price. Neil Snow

(1 of 1 customers found this review helpful)

 
5.0

great amp for the money

By sixstringloud

from cedar rapids ia

Comments about QSC RMX 850 Power Amp:

I replaced a crown amp with the 850, and I love the cleaner sound I'm getting. I use the amp in my studio at home and it is all the power I will ever need.

(1 of 2 customers found this review helpful)

 
5.0

Awsome Amp

By Panther3204

from Escanaba, Mi.

Comments about QSC RMX 850 Power Amp:

I bought this amp for powering our monitors in our band, I was so impressed with it I replaced one of my DJ amps with this one. Its not overly powerful, however the sound is extremely clean and punchy! I am going to buy 2 of the the RMX 2450 to power my new Peavey duel 18" subs I just bought! Can't wait to get them....Buy this amp you wont regret it!!

(0 of 1 customers found this review helpful)

 
5.0

Pro amp for home theater

By Mongrel714

from Florida

Comments about QSC RMX 850 Power Amp:

I bought a QSC RMX 1450 for my sub in my home theater set up after using them on the road in a few bands over the years, I never had a QSC amp fail in any way or any time so it seemed a logical choice, and when I mated that to a Sound Splinter PL-p18" driver the results were earthshaking, pun intended, An awesome amp at a great price, I hope my home insurance covers damage from low freq!!

 
5.0

This amp is awesome!!

By Dj Platinum

from White Salmon, Wa

Comments about QSC RMX 850 Power Amp:

When I bought this amp, I also bought along a pair of the dual 15 jrx 125 jbl speakers, and man this amp really pushes these things hard, I run it like 6 hours a gig at high volume since I'm a dj and these thing is a workhorse, this thing just wont give up on you, this qsc is made out of good quality, but it is a quite heavy amp. I dj'd with this setup for about a 200 people crowd and it did just fine, and I barely clip it and it will still go all night long clipping.

(5 of 6 customers found this review helpful)

 
5.0

Great hi-fi amp

By LexTom

from Lexington Ky

Comments about QSC RMX 850 Power Amp:

I've heard QSC amps in several hi fidelity systems so when I needed a new amp I bought an RMX 850. The amp is used below 1600 to drive the woofers of a pair of 1961 Altec 605A Duplexes. The resulting sound has excellent well defined bass, realistic vocal tonality and wide imaging with plenty of depth. The only drawback is the fan noise but as that noise isn't coming through the system it's easy for your mind to filter it out at low volumes. Given the high sensitivity of the 605s and the intended use I doubt the amp ever puts out more than a couple of watts, the thing should last forever. One can spend a great deal more money on "hi-fi" amps and not get as good a sound. I need to get another one for the PA in my music room.

(21 of 22 customers found this review helpful)

 
5.0

Great Amps

By The other Bob

from Philadelphia, PA

Comments about QSC RMX 850 Power Amp:

We have a couple of them in our system driving a combination of EV's and various other speakers in and around the sanctuary and they have never failed. Very reliable. Sunday service often has lots of music. Some times it's the choir, a New Orleans jazz band, prerecorded music, piano, quintets, quartets, it doesn't seem to matter. This amp handles it flawlessly.

(0 of 3 customers found this review helpful)

 
4.0

Push your bass rig --NOT

By mewzishun-MiO39

from Portland, Or

Comments about QSC RMX 850 Power Amp:

I've been a fan of the Crown amplifiers (macro-tech's in paticullar) for many years, but my bassist head blow out and needed another amp. I told him to pick up a RMX850 and a Ampeg preamp to power his JBL 15" and 18" cabinets. We ran it bridged mono for about a week and it had major over-heating and clipping problems. I guess this unit doesn't like 4 ohms bridged, so we switched to stereo and although the power amp was only pushing 200 watts a side @ 8ohms, he was able to obtain more volume, weird. Then about a week ago, he started to get this horrible crackling sound from his setup during a rehersal. After about 10 mins of that horrible sound, th amp stop making noise...it died. We called up QSC and told them our situation. They were very kind giving us all the info we needed to get the unit repaired and it's in the shop right now getting serviced for free. I felt that we should of moved to either a crown CE series or the QSC PLX series. This amp sucks, and I've seen 350W ampeg amps push a bass rig to inside rattling goodness. Why can't a 850W do the same thing? I learned my lesson. Buy bass gear to run bass gear; buy PA power amps to power PA gear. When we get it back, we'll probably sell it and save up for a SVT 4 pro. Anyways, I hope this helps.

(13 of 16 customers found this review helpful)

 
5.0

Great Power Amp

By soundman

from san jose, ca

Comments about QSC RMX 850 Power Amp:

The QSC RMX 850 will be able to handle most speakers. The sound it pumps out is very good, better than some Crown Amplifiers I have used. For an average user, this amp will be very dependable. It rarely heats up, which is always good to know.

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