Operating Manual - NE Multi Channel Power Amplifier
Amplifier Rear Panel
7. Remote Standby - These two contact closure pins are wired to a switch to remotely place the amp in standby.
8. Preset Recall - These four pins (and GND) can be wired to remote switches to recall up to four amplifier presets.
9. Data - These four pins can be wired to remote serial data controllers such as the Ashly WR-5 or RD-8C.
10. Remote Level Control - These pins are wired to potentiometers such as the WR-1 for level control of individual channels
11. AC Inlet - Used for the detachable AC cord.
WARNING: Do not remove or lift the mains connector ground.
Installation
Before connecting to mains power, make sure that the switches and wiring are all set to the configuration needed for your
particular application. Failure to do so could result in damage to the unit or other components in your system.
CAUTION: Before mounting or connecting the amplifier, always disconnect it from AC. Use four screws with lockwash-
ers when mounting the amplifier to the front rack rails. Rear support is also recommended, especially for mobile or touring use.
To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
Requirements
NE-series multichannel amplifiers have specific physical, electrical and signal requirements for proper operation. These
requirements will vary depending on your specific application, setup, and the settings on the amplifier. When setting up and
testing your system, please take special care to double check all connections and settings. Refer to the specifications section of
this manual for specific input, output and other figures.
Constant Voltage Models (25V, 70V, and 100V) and High Pass Filters
Amplifiers that are factory configured as 25V, 70V, or 100V models come standard with High Pass Filter (HPF) hardware
installed, allowing for software selectable filters on each channel. High pass filters prevent low frequency energy from saturat-
ing the iron core of low cost speaker tap transformers typically used in distributed constant voltage systems. Available filters
are 80Hz @12dB/oct, 400Hz @ 6dB/oct, and OFF. The 400Hz setting is commonly used in paging systems with horn speakers.
Note that with standard HPF hardware installed, DSP, network audio, AES3 input, and MIC input options cannot be installed.
As an upgrade, 25V, 70V, and 100V amplifiers can be ordered with Protea DSP instead of the standard HPF hardware.
HPF frequencies can then be set in software to any value from 20Hz to 20kHz with a slope of 12dB/oct to 48dB/oct.
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