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Page 2 - Operating Manual - Powerflex Multi-Channel Power Amplifier; Table Of Contents

2 Operating Manual - Powerflex Multi-Channel Power Amplifier Table Of Contents 1 I N T RO D U C T I O N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 U N PAC K I N G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3 - CAUTION; The lightning flash with arrow head symbol,

3 Operating Manual - Powerflex Multi-Channel Power Amplifier CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN The lightning flash with arrow head symbol, within an equalateral triangle, is intended to alert theuser to the presence of uninsulated "dangerous volt-age" within the product's enc losure...

Page 4 - INTRODUCTION

4 Operating Manual - Powerflex Multi-Channel Power Amplifier 1. INTRODUCTION The Ashly Powerflex amplifier s combine the effi- ciency of a MOSFET high-speed switching output stageswith the sophistication of modern microprocessors and DSPtechnology to produce a multi-channel amplifier with un-precede...

Page 6 - Powerflex

6 Operating Manual - Powerflex Multi-Channel Power Amplifier 6. FRONT PANEL INDICATORS 6.1 Power Switch When the unit is switched on there is a five sec- ond delay, during which time the PROTECT circuit willactivate , disconnecting the speakers from the amplifieroutput. When turning off the amplifie...

Page 7 - REAR PANEL FEATURES; Balanced Inputs

7 Operating Manual - Powerflex Multi-Channel Power Amplifier 7. REAR PANEL FEATURES 7.1 Input Connectors The P owerflex inputs use 1/4" tip-ring-sleeve (TRS) phone jacks, balanced XLR jacks, and balanced two piece "Euroblock" style connectors. The three types of connectors are wired in p...

Page 8 - Input Ground Switch

8 Operating Manual - Powerflex Multi-Channel Power Amplifier 7.2 Input Ground Switch This switch separates internal circuit ground from the chassis ground on all inputs. Ground connections froman incoming signal are always connected to internal cir-cuit ground, but float from the chassis ground as l...

Page 9 - Speaker Outputs - Binding Posts; If the mains voltage is 110-125VAC, the requir ed

9 Operating Manual - Powerflex Multi-Channel Power Amplifier The Powerflex 6250 is capable of three channels of bridged output, w hile the Powerflex 440 is ca pable oftwo c hannels of bridg ed output. To use bridged mode,first press MONO from the Stereo/Mono s witch on thechannel pair to be bridg ed...

Page 10 - SELF-PROTECTION FEATURES; Power supply undervoltage - less than about

10 Operating Manual - Powerflex Multi-Channel Power Amplifier 8. SELF-PROTECTION FEATURES Powerflex amplifiers contain circuitry to self-pro- tect during extreme fault conditions. These fault condi-tions are: 1.) Power suppl y undervoltage2.) Power supply overvoltage3.) Output overcurrent4.) Hea t s...

Page 11 - TYPICAL APPLICATIONS; Individual Channel Setup; Six Channel Setup; Dual Mono Setup

11 Operating Manual - Powerflex Multi-Channel Power Amplifier 9. TYPICAL APPLICATIONS The P owerflex 6250 is essentially thr ee stereo amplifier s in one chassis, each with dual stereo, dual mono, and bridged mono capabilities, w hile the Powerflex 4400 is two stereo amplifiers (four channels), but ...

Page 12 - Bridged Mono Setup

12 Operating Manual - Powerflex Multi-Channel Power Amplifier 9.3 Bridged Mono Setup 9.4 Typical PA Setup (Mono) (Mono) + - B rid g e/70V C h 1 (+ ) (-) C h 2 (+ ) (-) + - B rid g e/70V C h 3 (+ ) (-) C h 4 (+ ) (-) + - B rid g e/70V C h 5 (+ ) (-) C h 6 (+ ) (-) OUTPUTS Ashly Audio Inc. Made In USA...

Page 13 - DESIGN THEORY; Specification Notes: Due to its spread spectrum out-; TROUBLESHOOTING TIPS; The Powerflex amplifier

13 Operating Manual - Powerflex Multi-Channel Power Amplifier 10. DESIGN THEORY Powerflex amplifiers are based on ster eo driver modules that use digital processing to generate a spread-spectrum switching pattern between about 200KHz and1.5MHz, depending on input signal amplitude and fre-quency. Thi...

Page 14 - Distorted Sound; Hum or Buzz Noise

14 Operating Manual - Powerflex Multi-Channel Power Amplifier 11.2 Distorted Sound 1.) Clip LED is flashing regularly Amplifier is being overdriven. Turn down the in- put level control, or reduce the output level fr om the sig-nal source. 2.) Clip LED is not flashing at all Amplifier input signal ma...

Page 15 - Typical Idle Cur rent; * Continuous power limited by power line capacity; WARRANTY INFORMATION; We thank you for y our expression of confidence; SPECIFICATIONS; Rated Per Channel, Two Channels Dr iven

15 Operating Manual - Powerflex Multi-Channel Power Amplifier Typical Idle Cur rent Powerflex 6250 Powerfle x 4400 120V: 0.81A 120V: 0.9A 240V: 0.42A 240V: 0.5A Current with Typical Audio Program Material (4 ohm load- all Channels) Powerflex 6250 Powerfle x 4400 120V: 6.5A 120V: 7.0A 240V: 3.3A 240V...