Crown CDi 4000 - Troubleshooting; Specifications

page 18
CDi Series Power Amplifiers
Operation Manual
CDi Series Power Amplifiers
Operation Manual page 19
5 Troubleshooting
CONDITION: Normal operation.
• This is normal operation for your amp.
CONDITION: No power to the amplifier.
• The amplier’s Power switch is off.
• The amplier’s power cord is unplugged.
CONDITION: Distorted sound.
• Input signal level is too high. Turn down your amplier
Level controls. NOTE: Your amplifier should never be
operated at a level which causes the Clip LEDS to
illuminate constantly.
• The amplier 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.
CONDITION: No sound.
CONDITION: No sound.
• The amplier has just turned on and is still in
the 4-sec ond turn-on delay.
• Speakers not connected.
• No input signal
• Input signal level is very low.
• Level controls are turned down.
• Channel is in thermal protection.
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)
CDi 1K, 2K, 4K: 100 dB
CDi 6K: 103 dB
Damping Factor (8 ohm): 20 Hz to 400 Hz
> 500
Input Stage
Input is electronically balanced and employs
pre cision 1% resistors
AC Line Current
CDi 1000: 6.8A, CDi 2000: 8.3A, CDi 4000: 10.5A; at
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
Input Impedance (nominal) 20 kilohms balanced, 10 kilohms unbalanced
Load impedance (note: safe with all types of
loads)
Dual
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,
CDi 6000: 37.1 dB.
Sensitivity (at 8 ohm rated output) 1.4V
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
Available (± 10%)
100V, 120V, 220-240V 50/60 Hz
Ventilation
Flow-through ventilation from front to back
Cooling
Heat sinks and proportional-speed fan
Dimensions: Width, Height, Depth
(behind mounting surface)
EIA Standard 19” W (EIA RS-310-B)
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)
Per channel, both channels driven
2 ohm Dual (per channel)
4 ohm Dual (per channel)
8 ohm Dual (per channel)
4 ohm Bridge-Mono
70V Dual (per channel)
140V Bridge-Mono
With 0.5% THD
*With 1% THD
700W*
500W
275W
1,400W*
500W
1000W
1,000W*
800W
475W
2,000W*
800W
1600W
1,600W*
1,200W
650W
3,200W*
1000W
2000W
3,000W*
2,100W
1,200W
6,000W*
2,500W
—
6 Specifications