Rotel RKB-850


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 maximise long service life by utilising dual thermostatically controlled fans to take 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, system hubs 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.

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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): 108dB

Gain: 30dB

Intermodulation Distortion (60Hz:7kHz, 4:1): <0.08%

Damping Factor: >150

Speaker Impedance: 4Ω minimum

Input Sensitivity: 0.6V

Input Impedance: 100kΩ

Crosstalk / Separation: >60dB

Dimensions (W × H × D):

430 × 97 × 424mm

17″ × 3.9″ × 16.7″

Front Panel Height: 2U / 88.1mm (3.5″)

Power Requirements: 230V, 50Hz

Power Consumption: 150W

Standby Power Consumption: <0.5W

Net Weight: 9.3kg (20lbs.)