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Operating Manual - NE Two Channel Power Amplifiers

Protection

Ashly NE two channel power amplifiers come standard with several protection circuits:

Over Current Protection - Is controlled in the output stage.

Thermal Protection - When the internal temperature is below 40°C the fan runs at its slowest speed. Above 40°C

the speed is increased until it reaches its maximum value. If the temperature exceeds 100°C, the input on that channel is

reduced. If the temperature exceeds 110°C, the power supply is switched off.

Mains Protections – protection within the power supply includes: Inrush Current Limitation during power up,

Mains Over Voltage Detection, and internal Mains Fuse Protection. To protect the Mains fuse against AC overcurrent

due to excessive audio output current, there is a protection scheme controlled in Protea

amplifier front panel which reduces audio output level until the overcurrent condition is no longer present.

Physical Description

Each model in the NE two channel series is 2RU, and weighs 22 pounds (10kg) or less. The model number is

indicated in the lower left corner of the front panel.

Amplifier Front Panel

1. Mounting Holes – For rack mounting.

2. Power Switch – Switches the unit on or off. Note: The power switch can be disabled from Protea

3. Status LEDs – Indicate status of: Power, Standby, Protect, Power Switch Disable, and Com (Ethernet activity).

4. Air Inflow Vents – Cool air enters here.

6. Signal LEDs – The lowest LED will begin to light when the output voltage reaches -18dBu below rated output.

The Clip LEDs will begin to flash when output voltage is 1/2 Volt below the output power supply voltage.

7. Bridge – This LED indicates that the two channels are selected to BRIDGE mode from the back panel switch,

and that only channel 1 level control is active.

8. Temp and Current LEDs – The Temp LED indicates that the amplifier has reached an excessively high

operating temperature. The Current LED confirms that the amplifier output is delivered to a speaker load.

9. Channel Attenuators – These control the input signal level to the amp, and can be disabled from software.

10. Factory Reset – To reset all internal configurations (including passwords) back to their original factory

settings, press and hold this recessed front panel tact switch during power up until all channel LEDs are lit.

Upon reset completion, the LEDs will turn off and the amp will be in normal operating mode.

software and indicated on the

Software.