Used Crown ULTRATECH 2020
2 ohm stereo (per channel): 975W
4 ohm stereo (per channel): 660W
8 ohm stereo (per channel): 400W
4 ohm bridge-mono: 1950W
8 ohm bridge-mono: 1320W
Load Impedance: Safe with all types of loads. Rated for 4 and 8 ohms in Stereo mode, 4 ohms in Bridge-Mono mode
Voltage Gain to 1-kHz, 8-ohm rated output,
30.5-dB gain at 1.4-volt sensitivity;
26-dB gain at 2.34-volt sensitivity.
32.1-dB gain at 1.4-volt sensitivity;
26-dB gain at 2.83-volt sensitivity.
Required AC Mains: 50/60 Hz (North American units are 60 Hz only); 100, 120 and 230-240 VAC (+/-10%) units are available.
AC Line Current,
100 Volts: 11.4 A;
120 Volts: 9.5 A;
230-240 Volts: 5.0 A;
At Idle: All amps draw no more than 90 watts.
AC Line Connector: NEMA 5-15P (15 A).
Frequency Response: +/-0.2 dB from 20 Hz to 25 kHz at 1 watt.
Phase Response: +/-15 degrees from 20 Hz to 20 kHz at 1 watt.
Signal to Noise Ratio, A-Weighted: Better than 105 dB below rated 1-kHz power; 20 Hz to 20 kHz: Better than 100 dB below rated 1-kHz power.
Total Harmonic Distortion (THD): 1-kHz rated power, 0.5% or less true THD from 20 Hz to 20 kHz.
Intermodulation Distortion (IMD): (60 Hz and 7 kHz at 4:1) Less than 0.1% at rated power to 35 dB below rated power at 8 ohms.
Damping Factor: Greater than 400 from 10 Hz to 400 Hz.
Crosstalk: Better than 55 dB below rated power, 20 Hz to 20 kHz.
Common Mode Rejection (CMR): Better than 70 dB from 20 Hz to 1 kHz.
DC Output Offset (Shorted Input): +/-10 mV.
Level: A detented rotary level control for each channel located on the front panel.
Power: An on/off rocker switch located on the front panel.
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