Crown CDI 4000 Power Amplifier



The CDi Series of Crown amplifiers are professional tools designed and built for installed sound applications. “CDi” stands for Contractor Digital Intelligence. The series includes two models which are identical except for output power: CDi 1000 and CDi 2000. Both are rugged and lightweight, and offer unmatched value in their class.

CDi Series amplifiers feature an LCD screen with DSP speaker presets for crossover frequencies, EQ, limiting, compression, delay, and a subharmonic synthesizer. Other features include a switch-mode universal power supply, useful function indicators, proportional-speed fan-assisted cooling, removable Phoenix-style inputs, barrier strip outputs for low-Z or 70V/140V loads, short-circuit protection and more.




  • Accurate, uncolored sound with very low distortion for the best in music and voice reproduction
  • Advanced protection circuitry guards against: shorted outputs, open circuits, DC, mismatched loads, general overheating, high-frequency overloads and internal faults
  • Extremely versatile, handling a wide range of speaker impedances and outputs
  • Switch-mode universal power supply
  • Integrated DSP with LCD front panel display
  • Speaker presets for crossover frequencies, EQ, limiting, compression, delay, and subharmonic synthesis
  • All products fill 2U rack spaces and weigh under 19 pounds
  • Barrier strip outputs for low-Z or 70V/140V loads, removable Phoenix-style inputs
  • Three-Year, No-Fault, Fully Transferable Warranty completely protects your investment and guarantees its specifications


Frequency Response (at 1 watt into 4 ohms, 20Hz - 20 kHz)
+0/–1 dB
Signal to Noise Ratio (below rated 8-ohm power at 1 kHz, A-weighted)
100 dB
Damping Factor (8 ohm): 20 Hz to 400 Hz
> 500
Input Stage
Input is electronically balanced and employs
precision 1% resistors
AC Line Current
CDi 1000: 11.50A, CDi 2000: 11.93A, CDi 4000: 11.75A
At idle: Draws no more than 45 watts.
Crosstalk (below rated power) 20 Hz to 1 kHz
> 70 dB
Input Impedance (nominal)
20 kilohms balanced, 10 kilohms unbalanced
Load impedance (note: safe with all types of loads)
Bridge mono
2–8 ohms
4–16 ohms
Voltage Gain (at 1 kHz, 8 ohm rated output)
CDi 1000: 30.5 dB, CDi 2000: 32.9 dB, CDi 4000: 34.2 dB
Sensitivity (at 8 ohm rated output)
Maximum Input Signal
+22 dBu typical
Operating Temperature
0° C to 40° C at 95% relative humidity (non-condensing)
AC Line Voltage and Frequency Configurations Available (± 10%)
100V, 120V-240V, 50/60 Hz
Flow-through ventilation from front to back
Heat sinks and proportional-speed fan
Dimensions: Width, Height, Depth (behind mounting surface)
EIA Standard 19 in. W (EIA RS-310-B)
x 3.5 in. (8.9 cm) H x 12.25 in. (31.1cm) D
Net Weight, Shipping Weight
19 lb (8.6kg), 22 lb (10.0 kg)