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14. Appendices
13.4.4. Constant Voltage 70 V system setup and operation
When using E Series amplifiers to drive constant voltage (high-impedance) speaker systems at 70 Vrms or 100 V
peak, in most cases you can simply connect the speakers to the amplifier output terminals, select the 70 V RSL
setting, and place the amplifier in service.
Limiters - Limiting is applied to avoid distortion at the selected voltage limit threshold and to avoid hitting the rail if it
has sagged below the selected threshold.
Limiting also may be applied when maximum output current has been reached or when the mains voltage is too
low to maintain required rail voltage. Limiting activity is shown by the front panel Limiter LED.
13.4.5. Output Current Peak Limiter (CPL)
The Current Peak Limiter (CPL) ensures that the amplifier will not be damaged by trying to deliver current to the
outputs exceeding the physical limitations of the output devices. The CPL keeps the amplifier within the Safe
Operating Area. The CPL is non-adjustable and has different limit values depending on model type. The maximum
output current values for the three E Series models are:
• E 12:2, 18 Arms per channel
• E 8:2, 16 Arms per channel
• E 4:2, 14 Arms per channel
14. Appendices
14.1. Maintenance
During normal operation your E Series amplifier will provide trouble-free service. The only user maintenance
required is to periodically vacuum clean the air inlets in the front.
In some extreme cases it may be necessary for authorized service personnel to clean the inside of the amplifier in
order to safely remove dust or other build ups which may occur during prolonged normal usage. If you are using
your amplifier in a heavy duty application, it is recommended to have your amplifier cleaned inside every 3 years
purely as a preventative action.
18
E SERIES Operation Manual rev 2.0.0
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