CE2000TX Power Amplifier
3 Setup
3.7 Input Sensitivity Switch
A
If required, the Input Sensitivity switch can be moved to the 26 dB position, so that the ampli- fier provides a fixed voltage gain of 20 (or 26 dB: 1 volt in, 20 volts out). This setting works best with output levels of +10 dBu (2.5 volts RMS) or more. Some brands of DJ mixers, in particular, have output levels in this range.
Selecting the correct sensitivity will allow your equipment to operate at its optimum level and improve the
Make sure the amplifier is turned off and the level controls are turned down before you change the switch setting.
Sensitivity Switch
Figure 3.15 Location of Input Sensitivity Switch
3.8 Connect to AC Mains
Connect your amplifier to the AC mains power source (power outlet) with the supplied AC power cordset. First, connect the IEC end of the cordset to the IEC connector on the amplifier; then, plug the other end of the cordset to the AC mains.
WARNING: The third prong of this connec- tor (ground) is an important safety feature. Do not attempt to disable this ground con- nection by using an adapter or other meth- ods.
Amplifiers don’t create energy. The AC mains volt- age and current must be sufficient to deliver the power you expect. You must operate your amplifier from an AC mains power source with not more than 10% variation above or below the amplifier’s speci- fied line voltage and within the specfied frequency requirements (indicated on the amplifier’s back panel label). If you are unsure of the output voltage of your AC mains, please consult your electrician.
3.9 Startup Procedure
Use the following procedure when first turning on your amplifier:
1.Turn down the level of your audio source.
2.Turn down the level controls of the amplifier.
3.Turn on the “Power” switch. The Power indicator- should glow.
4.Turn up the level of your audio source to an opti- mum level.
5.Turn up the Level controls on the amplifier until the desired loudness or power level is achieved.
6.Turn down the level of your audio source to its normal range.
If you ever need to make any wiring or installation changes, don’t forget to disconnect the power cord.
For help with determining your system’s optimum gain structure (signal levels) please refer to the Crown Amplifier Application Guide, available online at www.crownaudio.com.
4 Operation
4.1 Precautions
Your amplifier is protected from internal and external faults, but you should still take the fol- lowing precautions for optimum performance and safety:
1.Before use, your amplifier first must be con- figured for proper operation, including input and output wiring hookup. Improper wiring can result in serious operating difficulties.
For information on wiring and configura- tion, please consult the Setup section of this manual or, for advanced setup techniques, consult Crown’s Amplifier Application Guide available online at www.crownau- dio.com.
2.Use care when making connections, select- ing signal sources and controlling the out- put level. The load you save may be your own!
3.Do not short the ground lead of an output cable to the input signal ground. This may form a ground loop and cause oscillations.
4.Never connect the output to a power supply, battery or power main. Elec- trical shock may result.
5.Tampering with the circuitry, or making unauthorized circuit changes may be haz- ardous and invalidates all agency listings.
6.Do not operate the amplifier with the red Clip LEDs constantly flashing.
7.Do not overdrive the mixer, which will cause clipped signal to be sent to the amplifier. Such signals will be reproduced with extreme accuracy, and loudspeaker damage may result.
8.Do not operate the amplifier with less than the rated load impedance. Due to the ampli- fier’s output protection, such a configuration may result in premature clipping and speaker damage.
page 14 | Operation Manual |
