Ashly TRA-4150 manual Introduction, AC Power Requirements, Unpacking

Operating Manual - Powerflex Multi-Channel Power Amplifier

1.INTRODUCTION

The Ashly Powerflex amplifiers combine the effi- ciency of a MOSFET high-speed switching output stages with the sophistication of modern microprocessors and DSP technology to produce a multi-channel amplifier with un- precedented versatility and power in a single 3RU pack- age.

Although similar to other amplifiers with class D output stages, Powerflex amplifiers employ internal mi- croprocessor and DSP algorithms to optimize output switching characteristics and eliminate the usual harshness associated with high-frequency audio in standard class D amplifiers. This optimization results in a spread-spectrum switched output that varies with input amplitude and fre- quency, and minimizes radiated emissions by eliminating the single-frequency high-energy radiated interference normally associated with switching outputs. The use of a simple linear power supply removes another potential source of radio-frequency interference, an important con- sideration as racks become more and more heavily popu- lated with digital signal processing equipment. A small switching supply using flyback topology provides an effi- cient power source for logic, protection, pre-amplifier and indicator circuits.

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 avail- able for inspection by the carrier. Save all packing mate- rials until the claim has been settled.

3.AC POWER REQUIREMENTS

3.1Voltage Requirements

The Powerflex amplifiers can be operated from nominal 120VAC or 240VAC, 50/60Hz mains. This is user- configurable by changing the insert in the AC Inlet (See section 7.9). The power connector on the amplifier accepts a standard IEC-320 receptacle.

For nominal 120VAC operation, the power cord should be three-conductor, rated for at least 13A (16AWG). The line fuse should be type MDA, 12A.

For nominal 240VAC operation, the power cord should be three-conductor, rated for at least 10A (18AWG). The line fuse should be type MDA, 10A.

3.2Current Requirements

To assure reliable operation, the usual protection from excessive high-frequency, DC offset, and thermal overload is supplemented by power supply undervoltage, power supply overvoltage, and output overcurrent detec- tion, all monitored and controlled by the latest in minia- turized microprocessor technology.

In sum, Ashly Powerflex amplifiers combine the best of the new digital technologies with the best of the traditional analog technologies to provide a product that will supply clean sound at full output from every channel while generating minimal heat, thus increasing the reli- ability of every other piece of equipment in a rack as well as preserving its own.

1.) Idle (no audio):

Powerflex 6250

120V: 0.81A

240V: 0.42A

2.) With typical audio inputs:

8Ω loads on all channels 120V: 4A

240V: 2A

4Ω loads on all channels 120V: 6.5A

240V: 3.3A

Powerflex 4400

120V: 0.9A

240V: 0.5A

120V: 4.6A

240V: 2.3A

120V: 7.0A

240V: 3.5A

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 ship- ping carton and all packing materials, as they were care- fully designed to reduce to minimum the possibility of transportation damage should the unit again require pack- ing 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.

70 Volt systems - (Powerflex 6250 Only,

3 channels Bridged Mono) 120V: 6.5A

240V: 3.3A

Powerflex amplifiers consumes less than 12 amps when all channels operate at 1/8 power into rated (4 ohm) loads. This condition satisfies the UL, CSA and building electrical code requirements for a piece of audio equip- ment not to consume more than 80% of the current avail- able when plugged into a grounded 15 amp outlet and operated at 1/8 of maximum power.

4