Distribution Amplifiers


Music everywhere with 8 x 50 watts per channel is the purpose of our rack mountable RKB-850.

Power8 x 50 Watts of

Class DClass D amplifier

Rack MountRack ears included

Automatic signal sensingAutomatic signal sensing

12 volt trigger12 volt trigger input

Engineered with care.

RKB-850 Internal View

Dimensions (W × H × D)
430 × 97 × 424mm
17" × 3.9" × 16.7"
Front Panel Height
2U / 88.1mm (3.5")
Power Requirements
120V, 60Hz
Power Consumption
Standby Power Consumption
Net Weight
9.3kg (20lbs.)
BTU Rating (4Ω, 1/8th power)
180 BTU/h


Continuous Power Output
50W/Ch (All channels driven, 8Ω)
Total Harmonic Distortion (THD)
(20Hz–20kHz) <0.08%
Frequency Response
10Hz - 100kHz +0dB, -1.4dB
S/N Ratio (IHF "A" Weighted)
Product Description 

Rotel has been designing and manufacturing award-winning power amplifiers for over 50 years. That considerable expertise has now been applied to a new generation of rackmount custom installation amplifiers that set new standards for performance, reliability, and ease of installation.

The RKB-850 is rated at 8 x 50 Watts RMS into 8 ohms all channels driven, and can double that output into 4 ohms as a result of its sophisticated, efficient Class D design. The amplifier is rugged and extremely reliable, but Rotel has gone one step further to maximize long service life by utilizing dual thermostatically controlled fans to exhaust heat away from the output modules and power supply.

One of the many custom-friendly features the RKB-850 offers is input linking. A second input can source from any ‘upstream’ input - so B can source from A, C can source from B and D can source from C. You can create four individual stereo zones, two dual zones or three common zones plus an individual zone. In other words, two Sonos Connects (for instance) might be divided between kitchen and patio (A+B zones) and Master Bedroom and Bath (C+D).

Other features include input signal sensing, buffered link output, a sum-to-mono feature, a rear panel RS232 connection allowing connection to automation systems to provide full control and feedback, and four front panel trim pots to allow easy level adjustment to balance zones.

More Specifications 
Intermodulation Distortion (60Hz:7kHz, 4:1)
Damping Factor
Speaker Impedance
4Ω minimum
Input Sensitivity
Input Impedance
Crosstalk / Separation

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