Ashly Power Amplifier

Ashly Power Amplifier

Note: This document is for use with Ashly™ Amplifiers and ASTi equipment only. Please refer to Ashly's website for more information.

Introduction

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

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

Getting Started

Warning: Before amplifier installation, ensure that your amplifier is not connected to power and all control levels are turned down (counterclockwise).

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.

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.

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.

General Information

Front Indication Lights

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 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.

Front Panel Connections

  • Channel Level Controls- act as the overall master gain control for each channel. The exact setting 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 amplifier Channel Level Controls to achieve the required loudness for this particular sound. In normal use, the Telestra configuration service will disable these controls.

Technical Specifications

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.

Minimum Guaranteed Power

- 150W per channel @ 8 Ohms
- 250W per channel @ 4 Ohms

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

Reliability

Typical System Mean Time Between Failure (MTBF)
ne8250 low-Z 478,000 hours

References

For more information and Ashly™-specific documentation, visit the Ashly™ Technical Support page.

Training videos are also available on Ashly's™ Youtube page.

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.