AJCalhoun

Overall Rating
 5 of 5

Value Rating
 5 of 5

Used product for
Less than 1 month

Visitors rate this review
1.00 of 5, 2.00 votes

Price Paid:  $76.00 from eBay

Summary:
OK, here's the deal: I have a Sony STR-DA777ES receiver powering B&W DM600S3s L&R, and a B&W CC-3 for center. I have absolutely no way to run wiring to the rears (a pair of a/d/s L200 minis on Sanus stands) - at least no way that my wife would accept (and I don't blame her. This ain't a college dorm). For a long time I used the neat little Kenwood RFU-6100 wireless sender/receiver gizmo and it worked really well, but I knew in my heart that the rears weren't getting anywhere near what the front and center speakers were, and it was hard to balance the sound. Then I disocovered Acurrian's HomePlug system that sends and recieves as well, but utilizes the house wiring's extra bandwidth, and has a built-in 25 w/ch. amp. I started with that, and it worked better than the Kenwood device. Still, it was only 25 w/ch. to the rears, while front and center were getting 120 clean, clear watts. The Acurrian thing has an RCA pass-through if you want to go that route, but I needed an amp to make it all work - one that would fit in the tight space between the sofa arm and the wall where the Acurrian receiver was hidden. I used to own a Rotel RB980X power amp rated at 120 per side and it had been incredibly powerful and clean, so I started looking and before long had found this RB-850, rated at 50 w/ch, which has to be a bald-faced lie, because connected to the Acurrian device it delivers what sounds like power identical to the Sony's L,C &R channels! No problem balancing this! Of course the little a/d/s speakers may be more efficient than the larger B&Ws, but it just seems to not make any difference. The surround sound coming through them now is absolutely incredible. I keep forgetting it's not the Sony rear amps driving them. I already was a believer, but this is such an incredibly GOOD way to solve an irritating problem and maintain true hi-fi in surround mode. (The accurian HomePlug device is now available from Radio Shack and works like a champ, adding no audible noise or distortion to the rig). This is just another great Rotel product that seems to be grossly underrated, and no, they don't make 'em like this anymore. Never gets warm to the touch, either. Just incredible. For the price I felt I had stolen it.

Strengths:
The usual: clarity, gobs of clean power, dead quiet, cool-running - just name it and if it's good it applies.

Weaknesses:
None. Absolutely none.

Similar Products Used:
Rotel RB-980X, Yamaha M-40, AudioSource Preamp/Tuner2, Sony TA-AV650ES, Sony STR-GX67ES, STR-DA30 and 50 ES, and now the STR-DA777ES, Sony DVP-NC80V and now Denon DVD-1920; B&W DM600S3s and CC-3, a/d/s L300S surrounds, and Boston Acoustics PV-400 powered sub. Oh, and that Acurrian thing I mentioned. If wires are a problem, check it out.

Petek177

Overall Rating
 5 of 5

Value Rating
 5 of 5

Used product for
More than 1 year

Visitors rate this review
2.25 of 5, 4.00 votes

Price Paid:  $250.00 from yard sale

Summary:
This is an excellent amp. I replaced a Kenwood Pro Logic Home Theatre receiver in part with Rotel RB 850 (power amp) and RC 850 pre-amp. I recently acquired a Yamaha DSP-E492 to complete the package. I use the Rotel for stereo and front speakers and the Yamaha to run center and rear and to feed signal to the sub. The Kenwood was very thin sounding compared to the Rotel. The Rotel is full range, clean, detailed and amazingly powerful for 50 watts per channel. In fact, it seems to have much more real power than the 100 watt per channel Kenwood. I also have a NAD 2150 I use to power speakers in other rooms. I recently reviewed the NHT super one speakers I use with the Rotel. In that review, I suggested the NAD was not as clean in the treble range as the Rotel. Well, maybe so, but I rewired the speaker connections in the room in question and that cleaned up the NAD. It is a good unit as well. Back to the Rotel. It is a great value and on an absolute level, sounds very good to my ears. I think it has dual power supplies and that might contribute to its sound quality.

Strengths:
Good power for only 50 watts, clean, full range, detailed sound. Small. Cool running.

Weaknesses:
A speaker AB switch would have been nice.

Similar Products Used:
NAD 2150

Price Paid:  $200.00 from friend

Summary:
I bought this amp about ten years ago to replace my Dynaco ST-70 which required too much maintenance. Compared to the Dynaco, it had much better Bass and a more transparent sound. The soundstage was also more coherent from top to bottom. I was surprised that although it didn't have the natural midrange of the Dyna, it wasn't far behind. The dynamics of this amp are also very good. Soundstage wise, it is wider, but not quite as deep. The midrange and treble are very clean. I've bypassed the stereo/mono switch and also bypassed or replaced the capacitors with polypropylenes for a minimal improvement. With my JR149 (LS3/5a) speakers this amp works very well. I had always planned to upgrade to something better, but I will probably wait until it breaks. As reliable as it has been, I'll probably wait for a few more years. Highly recommended if you can find one.

Strengths:
Good warm, detailed sound without the grainy treble of most budget amps.

Weaknesses:
Cheap plastic speaker posts

Similar Products Used:
Dyna ST-70, Little Adcom

Price Paid:  $125.00 from From a friend

Summary:
I wish all electronics were built as well as this wonderful amplifier.

I have used this amp to drive KEF 104/2 speakers for over 10 years. I originally got this amp from a friend as a "temporary measure" while I was saving for a more powerful amp. I've been so impressed with the amp that I've never felt the need to go shopping since. I previously had a Carver 1.0 and a NAD 2200 so I thought for sure I would be making a temporary sacrifice with this amp. Not the case.

Does anyone know what the BRIDGED MONO output is supposed to be on the RB-850? I'm thinking of getting Rotel's surround receiver RSX-972 and I think I could keep my RB-850 and bridge it mono to power the subwoofer.

Any comments or thoughts on this setup would be appreciated!

Strengths:
Unbelievable power for a 50 W amp! No problems after 12 years of operation! Clean warm sound.

Weaknesses:
NONE

Similar Products Used:
Carver 1.0T
NAD 2200

Summary:
I can't really remember when I did purchase my RB-850s (I have 2 in stereo mode bi-amplifying my speakers - one for the tweeter, one for the woofers), but I'm sure it was in the mid-80s at a time when Rotel was going to stop making them.
I've had two other integrated amps before this setup - a Yamaha (my first - and a complete joke) and a Rotel RA-820BX3 that I still have in a secondary setup. But when I got these, complete whith an RC-850 Rotel pre-amp, I stoped worrying about amplification... and I probably will for another ten years or so!
The sound is very "british" (i.e., "flat" in terms of frequency response), which I like very much, and the amps can handle really diverse kinds of music, from pop to jazz to classic to heavy metal.
They just don't make it like this anymore...

Strengths:
"British" sound at a bargain price.

Weaknesses:
None

Similar Products Used:
Rotel RC-850 (pre-amp); Rotel RA-820BX3 (integrated amp).