Ashly ne 8250.70, ne 8250.10, ne 4250.10p, ne 8250.25, ne 8250 User Manual

ne 4250

ne 8250
ne 4250.25
ne 8250.25
ne 4250.70
ne 8250.70
ne 4250.10
ne 8250.10

Network Enabled

Multi Channel Power Amplifiers

Operating Manual

ASHLY AUDIO INC.

847 Holt Road Webster, NY 14580-9103 Phone: [phone]

Toll-Free: [phone] Fax: [phone] www.ashly.com

Operating Manual - NE Multi Channel Power Amplifiers

Table Of Contents

1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 THE NE MULTICHANNEL AMP SERIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Rear Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Constant Voltage Models (25V, 70V, and 100V) and High Pass Filters . . . . . . . . . . 7

4 REMOTE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

On/Off Remote Standby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Preset Recall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Data Control (WR-5, RD-8C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Remote Level Control (WR-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 PROTEA

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Amplifier Control Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

The DSP Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 WARRANTY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

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Operating Manual - NE Multi Channel Power Amplifiers

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK,
DO NOT EXPOSE THIS APPlIANCE TO RAIN OR MOISTURE.

TO REDUCE THE RISK OF FIRE, REPLACE ONLY WITH
SAME TYPE FUSE. REFER REPLACEMENT TO QUALI­FIED SERVICE PERSONNEL.

WARNING:

THIS APPARATUS MUST BE EARTHED

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Operating Manual - NE Multi Channel Power Amplifiers

1. INTRODUCTION

Thank you for your purchase of this NE (network enabled) multi channel power amplifier. The NE power ampli-

fiers combine lightweight, state of the art, high efficiency switching technology with integrated Ethernet control, and use
optional modular expansion cards to provide comprehensive internal DSP processing, AES/EBU input, and networked
digital audio (Cobranet) input. Please read the entire manual to fully understand the features and capabilities of this
product.

About Ashly

Ashly Audio was founded in 1974 by a group of recording engineers, concert sound professionals, and electronics
designers. The first products were elaborate custom consoles for friends and associates, but business quickly spread to
new clients and the business grew. The philosophy we established from the very beginning holds true today: to offer
only the highest quality audio tools at an affordable cost to the professional user – ensuring reliability and long life.
More than thirty years later, Ashly remains committed to these principles.

Ashly’s exclusive Five Year, Worry- Free Warranty remains one of the most liberal policies available on any
commercial- grade product. The warranty covers every product with the Ashly brand name, and is offered at no extra
cost to you, our customer.

FCC Compliance

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference

2. This device must accept any interference received, including interference that may cause undesired operation.

2. UNPACKING

As a part of our system of quality control, every Ashly product is carefully inspected before leaving the factory to
ensure flawless appearance. After unpacking, please inspect for any physical damage. Save the shipping carton and all
packing materials , as they were carefully designed to reduce to minimum the possibility of transportation damage
should the unit again require packing and shipping. In the event that damage has occurred, immediately notify your
dealer so that a written claim to cover the damages can be initiated.

The right to any claim against a public carrier can be forfeited if the carrier is not notified promptly and if the
shipping carton and packing materials are not available for inspection by the carrier. Save all packing materials until the
claim has been settled.

3. THE NE MULTICHANNEL AMP SERIES

There are two multichannel amplifier models for Low-Z output (4-8 ohm direct speaker loads) and six models for
constant voltage distributed output systems (transformer loads).

Model:

ne4250 - Four Channels, 250W per channel into 4 ohms

ne8250 - Eight Channels, 250W per channel into 4 ohms

ne4250.25 - Four Channels, 25 volt output, 250W per channel

ne8250.25 - Eight Channels, 25 volt output, 250W per channel

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Operating Manual - NE Multi Channel Power Amplifiers

ne4250.70 - Four Channels, 70 volt output, 250W per channel

ne8250.70 - Eight Channels, 70 volt output, 250W per channel

ne4250.10 - Four Channels, 100 volt output, 250W per channel

ne8250.10 - Eight Channels, 100 volt output, 250W per channel

The basic NE multichannel amplifiers come in either four channel or eight channel configurations with Euroblock

input connectors. Output connectors are also Euroblock. Standard features on all models include balanced analog
inputs, bridge mono mode per channel pair, full ethernet control using Protea
contact closure preset recall, remote control through micropocessor based devices such as the Ashly WR-5, RD-8C, or
other custom control, and DC remote level control using an Ashly WR-1.

Additional hardware options for the NE

1) Internal DSP Processing - With this factory installed option, and using Protea

each amplifier input channel can be configured with pluggable DSP blocks to have its own dynamics control, gain
functions, graphic and/or parametric EQ, Hi-pass/Lo-pass filters, time delay, metering, and test signal generator. A
mixer section with assignable routing allows any input to drive any or all amplifier outputs. Outputs have the same DSP
functions as inputs, with the addition of a fast, automated crossover setup. Both inputs and outputs can copy/paste their
settings to other channels, or can link with one or more other channels to track their settings.

multichannel power amplifiers include the following:

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software, remote standby for power up,

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(network enabled) software,

Presets can be used to store and retrieve global parameters of an entire amplifier’s control surface and DSP section
from a file. In addition, Sub Presets allow for a collection of individual DSP function parameters within and across
multiple channels of an amplifier to be stored and recalled as a set, affecting only those parameters and channels which
have been tagged. Up to 35 presets/subpresets can be stored within the amplifier, and can be recalled in real time from
a computer, WR-5 remote control, or contact closure switches (up to four).

2) AES/EBU Input - Using an optional four or eight channel input card, NE multichannel amplifiers can accept AES/
EBU digital inputs. This protocol allows 2 channels of digital audio to be transmitted over a single cable, thus maintaining a
completely digital signal path until just before the power amplification stage. 48kHz & 96kHz data rates are supported.

3) MIC Inputs - In conjunction with the factory installed DSP option, four analog MIC inputs can be installed
(instead of AES/EBU) for full gain, mixing, and dsp processing capabilities using Protea

4) Network Digital Audio (Cobranet) - This option allows the NE multichannel amplifier to be part of a net­worked audio distribution system. CobraNet is a technology developed and supported by Cirrus Logic (www.cirrus.com).
It is a combination of software, hardware and network protocol which allows distribution of multiple channels of real­time, high quality digital audio over a standard Ethernet Network. For detailed information about CobraNet or its
implementation or installation please visit www.cobranet.info.

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software.

Protection

Ashly NE multichannel 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 120°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.

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software and indicated on the

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