Ashly Protea NE8250 Manuel utilisateur

Ashly Power Amplifier

Contents

Contents 1

1 Introduction 2

1.1 Dimensions ......................................... 2

2 Getting Started 3

2.1 ProperCooling ....................................... 3

2.2 SetupProcedure ...................................... 3

2.3 PoweringUptheAmpliﬁer ................................ 4

3 General Information 5

3.1 FrontIndicationLights................................... 5

3.2 RearPanelConnections .................................. 5

3.3 FrontPanelConnections.................................. 6

4 Technical Speciﬁcations 6

4.1 Wiring............................................ 6

4.2 MinimumGuaranteedPower ............................... 6

4.3 MemoryDevices ...................................... 6

4.4 Reliability.......................................... 7

5 References 7

5.1 Ashly Ampliﬁer Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Note: This document is for use with Ashly Ampliﬁers and ASTi equipment only. Please refer to

Ashly’s website1for more information.

1 Introduction

The Ashly Power Ampliﬁer provides power to drive passive audio loudspeakers (4 or 8). Each

ampliﬁer is a network device that integrates with ASTi’s ACENet. ACENet provides a low latency,

network-based audio and I/O distribution architecture for ASTi’s Telesta 4 and Voisus platforms.

The ampliﬁer also oﬀers a full range of indicators for accurate diagnostics. This document provides

an overview of the ne8250c 8-channel ampliﬁer. For a more comprehensive explanation of the Ashly

products, please read the documents mentioned in the Reference section of this document (Sec.5).

1.1 Dimensions

ne8250C 8-Channel Ashly Amp

Ashly Ampliﬁer Depth Width Height

ne8250c (black chassis) 15.5 in. 19 in. 3.5 in.

ne8250c (black chassis) 39.4 cm 48.3 cm 8.9 cm

ne8250c (silver chassis) 16.84 in. 19 in 3.5 in.

ne8250c (silver chassis) 42.77 cm 48.26 cm 8.89cm

1http://www.ashly.com/

2 Getting Started

Warning: Before ampliﬁer installation, ensure that your ampliﬁer is not connected to power

and all control levels are turned down (counterclockwise).

2.1 Proper Cooling

Do not block any of the ampliﬁer ventilation vents. When using an equipment rack, mount the

units directly on top of each other. Do not block rear, front, or side air vents. The side walls of the

rack should be a minimum of one inch (2.5cm) away from the ampliﬁer sides, and the back of the

rack should be open.

2.2 Setup Procedure

1. Use the “Primary” or “Secondary” port and a Cat 5 cable to connect to the ACENet switch.

Do not connect both.

2. Connect the “10/100 Ethernet” port to the ACENet switch.

3. Connect the AC power cord.

The Analog Input Connectors are not used in the ASTi system setup.

Warning: Do not connect or disconnect speakers or ACENet while the ampliﬁer is powered

on.

2.3 Powering Up the Ampliﬁer

Important: Complete section 2.1. Setup Procedure before proceeding with this section.

When turning on the ampliﬁer for the ﬁrst time, follow the steps below.

1. Turn down the levels on the front panel.

2. Turn on the Power switch. The power indicator should illuminate after a short boot up

sequence.

3. Once the ampliﬁer is connected to the network and powered up, use the RMS ACENet page

to complete the ampliﬁer conﬁguration.

Remember : Disconnect the power cord before making any change to the installation or wiring.

3 General Information

3.1 Front Indication Lights

3.2 Rear Panel Connections

•AC Power Cord Connector- Standard IEC type 320 inlet, 120V models are 15-amp, 220–240

models are 10-amp. Voltage is indicated above IEC inlet.

•Output Connector- for every two channels - On Shore Technologies inc. OSTTJ040150

•Primary and Secondary Ethernet Connection- connects to ASTi’s ACENet which provides

low latency, network-based audio architecture for ASTi’s communications and sound modeling

equipment and software. For more information on this architecture and scalable distribution

network, please see the Telestra 4 ACENet User Guide (DOC–01-Tel4-AN-UG–1).

•Mode Switch- for every two channels, this switch selects the ampliﬁers mode- bridge or normal.

In most cases, this should be set to normal.

Warning: Ensure that the ampliﬁer is powered oﬀ before changing the mode setting.

•Input Connectors- removable euroblock connectors for balanced analog audio signal input.

The Input Connectors are not used in the ASTi system setup.

3.3 Front Panel Connections

•Channel Level Controls- act as the overall master gain control for each channel. The exact set-

ting required for any speciﬁc installation will depend on a number of factors including speaker

placement, speaker sensitivity, size of the space being driven, and of course the required sound

level required from the system. Conventional audio set-up procedures apply, such that the

signal source should be set to the maximum level achievable while avoiding overload (clipping)

for the loudest signal levels required from the system (typically the “crash” sound for a ﬂight

simulator), this aﬀording the maximum signal-to-noise performance, and then setting the am-

pliﬁer Channel Level Controls to achieve the required loudness for this particular sound. In

normal use, the Telestra conﬁguration service will disable these controls.

4 Technical Speciﬁcations

4.1 Wiring

Select the appropriate size of the wire based on the distance from the ampliﬁer to the speaker.

Distance Wire Size

up to 25 ft. (7.6 m) 16 AWG

26–40 ft. (7.9–12.2 m) 14 AWG

41–60 ft. (12.5–18.3 m) 12 AWG

Over 60 ft. (18.3 m) 10 AWG

Warning: Never connect the speaker return to the chassis of the ampliﬁer or damage to the

ampliﬁer may result. Never use shielded cable for output wiring.

4.2 Minimum Guaranteed Power

- 150W per channel @ 8 Ohms

- 250W per channel @ 4 Ohms

4.3 Memory Devices

The Ashly Amp memory devices are summarized in the table below.

Volatile

MCU Internal Flash 512kb

MCU Internal SRAM 64kb

Non-Volatile

SRAM 32kb

Flash 2 Mb

4.4 Reliability

Typical System Mean Time Between Failure (MTBF)

ne8250 low-Z 478,000 hours

5 References

For more information and Ashly-speciﬁc documentation, visit the Ashly Technical Support2page.

Training videos are also available on Ashly’s Youtube3page.

5.1 Ashly Ampliﬁer Part Numbers

This document refers to a speciﬁc Ashly ampliﬁer. If purchasing an Ashly ampliﬁer from another

source, follow the part numbers below to ensure compatibility. Similar part numbers that may

appear to be the same will not work consistently with ASTi’s ACENet architecture.

Ashly Ampliﬁer Part Number

ne8250 with CNM–2 expansion card A-PAMP-ASH–8

Please contact ASTi for information regarding any international voltage requirements.

2http://www.ashly.com/technical-support-resources/technical-support.php

3https://www.youtube.com/user/AshlyAudioTraining/playlists

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