CITATION 21 (TWENTY ONE)

CITATION 21 (TWENTY ONE)

Stereo Preamp

Sold from 1987 until 1991

Predecessor Product: HK 825
Successor Product: AP 2500

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Product Specifications

Audio Inputs
4 stereo line & 2 stereo phono
Audio Loops
2 stereo
Preamp Outputs
1 Stereo Pair
Output Level/Impedance
1 volt (10k ohm load, 20Hz – 20kHz) MAXIMUM – 10 volts
Output Impedance
330 ohms
Frequency Response
0.25% – 250kHz (+0/-3dB)
Total Harmonic Distortion
0.001%
Slew Rate
120 volts/microseconds
Rise Time
1.4 microseconds
Signal-to-Noise Ratio
PHONO – 78dB (mc) & 83dB (mm)
Signal-to-Noise Ratio
CD, VIDEO, etc – 94dB
Input Level/Impedance
PHONO – 65 microvolts/56 ohms (mc) & 1.1 millivolts (mm)
Input Level/Impedance
CD, VIDEO, etc – 65 millivolts/22k ohms
RIAA Equalization
±0.2dB (20Hz - 20kHz)
Phono Overload
9 millivolts (mc) & 160 millivolts (mm)
Filter
SUBSONIC – -3dB @ 15Hz (6dB/octave)
Tone Controls
BASS – ± 10dB @ 50Hz
Tone Controls
TREBLE – ±10dB @ 10kHz
Loudness Control
+10dB @ 50Hz & +3dB @ 250Hz
MSRP U.S.
$549.95 each

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