Crown ct-1600 Manual Suplementario

Spec: 17 - 25 V/µS, 8 ohm load.

Initial Conditions: Controls per standard.

Procedure: Load each channel to 8 ohms. Inject a 10

kHz square wave to obtain 35 Volts zero-to-peak at
each output. Observe the slope of the square wave. It
should typically measure 17-25 V/µS. Also, the square
wave must not include overshoot, ringing, or any type
of oscillation.

Spec: -60 dB at 20 kHz.

Initial Conditions: Controls per standard. Terminate

input of channel not driven with 600 ohms.
Procedure: 8 ohm load on each channel. Inject a 20 kHz

sine wave into the channel 1 input and increase output
level to 29 VAC. Measure less than 29 mVAC at the
output of channel 2. Inject a 20 kHz sine wave into the
channel 2 input and increase output level to 29 VAC.
Measure less than 29 mVAC at the output of Ch 1.

Spec at 8 Ohm Stereo: 

≥

 105 Watts/Ch at 0.1% THD

Spec at 4 Ohm Stereo: 

≥

 140 Watts/Ch at 0.1% THD

Spec at 70-V Mode, Stereo: 

≥

 100 Watts/Ch at 0.1% THD,

50 Ohm load.
Initial Conditions: Controls per standard

Procedure: Load each channel to 8 ohms. Inject a 1 kHz

sine wave and measure at least 28.98 VAC at the
output of each channel. Load each channel to 4 ohms.
Inject a 1 kHz sine wave and measure at least 23.66
VAC at the output of each channel. Switch each chan-
nel to the 70-V mode. Load each channel to 50 ohms.
Inject a 1 kHz sine wave and measure at least 70.7 VAC
at the output of each channel. All power measurements
must be at less than 0.1% THD.

Spec: No oscillations. Safe with all types of loads.

Initial Conditions: Controls per standard.

Procedure Capacitive: Load each channel to 8 ohms in

parallel with 2µF. Inject a 20 kHz sine wave with 22 VAC
output for 10 seconds.
Procedure Inductive: Load each channel to 8 ohms in

parallel with 159µH. Inject a 1 kHz sine wave with 15
VAC output for 10 seconds.
Procedure Torture: Load each channel with the primary

(red and black leads) of a PS-U transformer (CPN D
7040-5). Each channel in the 70-V mode. Inject a 10 Hz
sine wave with an output level sufficient enough to
cause 3 to 5 flyback pulses for 10 seconds.

Procedure Short: Inject a 60 Hz sine wave into the input

and adjust for 5 VAC at the output. Short each chanel,
one at a time, for 10 seconds.

Spec: No oscillation on ODEP limiting wave form; either

channel controls limiting in Parallel Mono mode.
Initial Conditions: Controls per standard; rag or other

obstruction blocking fan blade so it does not turn (if
FAN is installed).
Procedure: Load the amplifier to 2 ohms per channel.

Inject a 60 Hz sine wave into each channel and adjust
the output to 10 VAC. Allow the amplifier to heat up until
you observe a wave form similar to figure 5. Allow the
amplifier to cool for a few miniutes. Switch the amplifier
to Parallel Mono mode and remove the load from
channel 2. Inject a 60 Hz sine wave into each channel
and adjust the output to 10 VAC. Allow the amplifier to
heat up and observe limiting on both channels.

Spec: Amplifier mutes for dangerous subsonic fre-

quencies.
Initial Conditions: Controls per standard.

Procedure: No load. Inject a .5 Hz 6 Vp-p, or a 2 Hz 6

VAC sine wave into each channel and verify that each
channel cycles into mute.