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21K

Audiophile Grade Stereo High Current Amplifier
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  • 2 channels rated at a powerful 90 watts RMS per channel into an 8 ohm load.
  • Can be mono bridged; 180 watts into 8 ohms.
  • Stable at 2 -16 ohms in stereo mode.
  • Rear mounted individual level gain controls.
  • Voltage trigger for remote turn on and turn off.
  • Insulated gold binding posts spaced for dual banana plugs.
  • Two rack spaces (3-1/2") with optional rack mount version.


    • Knoll sets the standards high with the 21K stereo audiophile grade amplifier
    The Knoll 21K stereo amplifier is the first in a new generation of discrete audiophile grade two-channel products. It delivers a powerful 90 watts per channel into an 8-ohm load. Long established as a manufacturer of durable, high quality multi-zone amplifiers, the 21K class AB amplifier is a logical step for Knoll.

    With its five way gold binding posts, gold RCA inputs, oversized heat sinks, rear mounted volume controls, power trigger on/off and bridgeable (180 watts into 8 ohms) configuration, the 21K is poised to compete with the best of its benchmark competitors. Stable at 2, 4 and 8 ohms, the 21K is now available in either brushed aluminum or black faceplate and in 17” or 19” EIA versions.

    Hey but don’t just take our word for it. Listen and compare for yourself.

    With over 20 years of experience in building superb sounding products for the custom installation industry Knoll is a leading manufacturer of amplifiers, volume controls, projectors and speakers.

    Specifications:

     
    Inputs Gold RCA jacks with adjustable gain
    Input impedance 50k ohms
    Outputs Insulated 5 way gold binding posts
    Output power-stereo 90 watts RMS per channel (8 ohms)
    Output power-bridged 180 watts per channel (8 ohms)
    Ideal impedance 2 - 8 ohms
    Frequency response 10 Hz - 40 kHz +/- 1dB (1w)
    S/N ratio over 109 dB A weighted (90 watts)
    THD distortion less than 0.1% 20 Hz to 20 kHz
    IMD distortion less than 0.01% 60 Hz 7 kHz 4:1 (SMPTE)
    Trigger control 12 VDC 35mA on 3.5mm mono jack
    Dimensions 17" x 3.5" x 11.5" (432 x 89 x 292mm)
    Chassis steel, power-coated
    Power 275 watts at 117 VAC (230VAC not available)
    Weight 20 lbs (9 kg)

    Note: Specifications subject to change without notice.

    Options:

    Rack mount version for standard 19" rack. Occupies two rack spaces and we strongly recommend blank spaces above and below for maximum power output.
    © Knoll Systems 2005