Troubleshooting; Specifications - Crown CDi 4000 Operation Manual

5 Troubleshooting

CONDITION: Normal operation.
• This is normal operation for your amp.
CONDITION: Distorted sound.
• Input signal level is too high. Turn down your amplifier
Level controls. NOTE: Your amplifier should never be
operated at a level which causes the Clip LEDS to
illuminate constantly.
CONDITION: No power to the amplifier.
• The amplifier's Power switch is off.
• The amplifier's power cord is unplugged.
CONDITION: No sound.
• The amplifier is in "fault" mode. A Fault status can be
triggered when one of the amplifier's protection circuits
is activated. First disconnect your speakers from the
affected channels(s) one by one to determine if one of the
loads is shorted. If the indicators return to normal status,
then try a different speaker or cable to determine where
the short is occurring. If no short can be found, turn off
the amp and allow the amp to cool. If indicators do not
return to normal after restarting your amp, check the fuse
and replace if necessary, or return amp to Crown or an
authorized Crown Service Center for servicing.
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CDi Series Power Amplifiers
CONDITION: No sound.
• The amplifier has just turned on and is still in
the 4-sec ond turn-on delay.
• Channel is in thermal protection.
• No input signal
• Input signal level is very low.
• Level controls are turned down.
• Speakers not connected.
Operation Manual
CDi Series Power Amplifiers

6 Specifications

Per channel, both channels driven
2 ohm Dual (per channel) 700W* 1,000W* 1,600W*
4 ohm Dual (per channel) 500W 800W 1,200W
8 ohm Dual (per channel) 275W 475W 650W
4 ohm Bridge-Mono 1,400W* 2,000W* 3,200W*
70V Dual (per channel) 500W 800W 1000W
140V Bridge-Mono 1000W 1600W 2000W
With 0.5% THD
*With 1% THD
Frequency Response
+0/–1 dB
(at 1 watt into 4 ohms, 20Hz - 20 kHz)
Signal to Noise Ratio CDi 1K, 2K, 4K: 100 dB
(below rated 8-ohm power at 1 kHz, A-weighted) CDi 6K: 103 dB
Damping Factor (8 ohm): 20 Hz to 400 Hz > 500
Input is electronically balanced and employs
Input Stage
pre cision 1% resistors
CDi 1000: 6.8A, CDi 2000: 8.3A, CDi 4000: 10.5A; at
AC Line Current
idle draws no more than 38 watts.
CDi 6000: 15.3A; at idle draws no more than
180 watts.
Crosstalk (below rated power)
20 Hz to 1 kHz > 70 dB
Operation Manual
Input Impedance (nominal) 20 kilohms balanced, 10 kilohms unbalanced
Load impedance (note: safe with all types of
loads)
Dual 2–8 ohms
Bridge mono 4–16 ohms
3,000W* Voltage gain (at 1 kHz, 8 ohm rated output) CDi 1000: 30.5 dB, CDi 2000: 32.9 dB, CDi 4000: 34.2 dB,
2,100W CDi 6000: 37.1 dB.
1,200W
Sensitivity (at 8 ohm rated output)
1.4V
6,000W*
2,500W
Maximum Input Signal +22 dBu typical
—
Operating Temperature 0° C to 40° C at 95% relative humidity (non-condensing)
AC Line Voltage and Frequency Configura tions
100V, 120V, 220-240V 50/60 Hz
Available (± 10%)
Flow-through ventilation from front to back
Ventilation
Heat sinks and proportional-speed fan
Cooling
Dimensions: Width, Height, Depth EIA Standard 19" W (EIA RS-310-B)
(behind mounting surface) x 3.5" (8.9 cm) H x 12.25" (31.1cm) D
CDi 6000 is 16.2 in. (41.15 cm) D
Net Weight, Shipping Weight CDi 1K. 2K, 4K: 19 lb (8.6 kg)
CDi 6K: 24 lb (10.9 kg)
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