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
1
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
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.
3
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.
4
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.
5
•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
6
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
7
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3
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