Powerflex Multi-Channel Power Amplifiers Operating Manual Channel 1 Channel 2 Channel 3 Channel 4 Protect Thermal Clip Signal Channel 1 Protect Thermal Clip Signal Channel 5 Channel 6 Power Channel 2 Channel 3 Powerflex 6250 Powerflex 4400 Channel 4 Power ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103 Phone: (716) 872-0010 Toll-Free: (800) 828-6308 Fax: (716) 872-0739 www.ashly.
Operating Manual - Powerflex Multi-Channel Power Amplifier Table Of Contents 2 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 AC 3.1 3.2 3.3 4 CABLE REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4.1 Input Cables . . . . .
Operating Manual - Powerflex Multi-Channel Power Amplifier 10 DESIGN THEORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 11 TROUBLESHOOTING TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 No Audio Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2 Distorted Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Manual - Powerflex Multi-Channel Power Amplifier 1. INTRODUCTION The Ashly Powerflex amplifiers combine the efficiency of a MOSFET high-speed switching output stages with the sophistication of modern microprocessors and DSP technology to produce a multi-channel amplifier with unprecedented versatility and power in a single 3RU package.
Operating Manual - Powerflex Multi-Channel Power Amplifier 3.3 AC Grounding Requirements To reduce the risk of ground loop hum, all system ground references should originate at the same point in your AC power distribution. Do not remove the amplifier’s ground pin, as it creates a potential shock hazard. 4. power loss in the cable would be half that of a 100 ft run of #14 wire as shown in the table, or 1.6% of 150W, which is an insignificant 2.4 watts. However, if you were to run 200 ft of 18 ga.
Operating Manual - Powerflex Multi-Channel Power Amplifier Channel 1 Channel 2 Channel 3 Channel 4 Protect Thermal Clip Signal 6. FRONT PANEL INDICATORS 6.1 Power Switch When the unit is switched on there is a five second delay, during which time the PROTECT circuit will activate, disconnecting the speakers from the amplifier output. When turning off the amplifier, the load is removed instantly, and the protect LED will briefly turn on as the power supply discharges. 6.
Operating Manual - Powerflex Multi-Channel Power Amplifier * Powerflex 6250 shown - Powerflex 4400 only has channels 1-4. 0 7. REAR PANEL FEATURES 7.1 Input Connectors The Powerflex 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 parallel and may be used balanced or unbalanced. Use the euro-block connectors to daisy-chain multiple amps together .
Operating Manual - Powerflex Multi-Channel Power Amplifier 3 Ch. 2 1-2 1 * Po w e r f l ex 6250 shown Po w e r f l ex 4400 only has inputs 1-4. 50Hz 4 5 Stere o Mono 6 8 Dual B ridge Ch2 - + AC 50Hz PUSH Ch1 (Mono) Float Chassis 3 7 4 5 Stere o Mono 6 Ch 1 In (Mono) Ground + - Norm (3-4 M ono) LoCut Ch 3 In (Mono) 115V 7.2 Input Ground Switch This switch separates internal circuit ground from the chassis ground on all inputs.
Operating Manual - Powerflex Multi-Channel Power Amplifier BRIDGE MODE: Take Output From Two Red Posts. Do Not Connect Either Output Wire To Ground. * Po w e r f l e x 6250 shown Po w e r f l e x 4400 only has channels 1-4 (+) with no 70V output. Ch1 (-) Dual Stereo/Dual Mono Mode: 150W/Chan - 8Ω 250W/Chan - 4Ω Ashly Audio Inc.
Operating Manual - Powerflex Multi-Channel Power Amplifier 8. SELF-PROTECTION FEATURES Powerflex amplifiers contain circuitry to self-protect during extreme fault conditions. These fault conditions are: 1.) 2.) 3.) 4.) 5.) 6.
Operating Manual - Powerflex Multi-Channel Power Amplifier 9. TYPICAL APPLICATIONS The Powerflex 6250 is essentially three stereo amplifiers in one chassis, each with dual stereo, dual mono, and bridged mono capabilities, while the Powerflex 4400 is two stereo amplifiers (four channels), but with more power per channel than the 6250. The ability to easily mix and match various configurations is what puts the "flexibility" in Powerflex.
Operating Manual - Powerflex Multi-Channel Power Amplifier 9.3 Bridged Mono Setup Bridged Mono Setup Input Section: Up to Three Different Inputs Stereo/Mono Switches - In Dual/Bridge Switches - In Levels Controls - Only Channels 1, 3, or 5 Used 3 Ste reo Mono 5 6 3 7 4 5 6 7 Ch. 2 1- 2 1 8 2 9 1 0 C h1 10 Norm(1 -2 Mono) LoCut 50Hz 3 0 C h210 Dual B ridge Ste reo Mono 5 6 3 7 4 5 6 8 Ch.
Operating Manual - Powerflex Multi-Channel Power Amplifier 10. DESIGN THEORY Powerflex amplifiers are based on stereo driver modules that use digital processing to generate a spreadspectrum switching pattern between about 200KHz and 1.5MHz, depending on input signal amplitude and frequency. This overcomes the self-limiting and inherent weakness in traditional class D fixed-frequency PWM amplifiers, and produces an output with THD+N numbers comparable to class A and class AB linear amplifiers.
Operating Manual - Powerflex Multi-Channel Power Amplifier 11.2 Distorted Sound 11.3 1.) Clip LED is flashing regularly Be sure that the power cord’s 3-prong plug is connected to a properly earth-grounded outlet. Lifting the grounding third prong may not improve hum or buzz and can create a potential shock hazard. Amplifier is being overdriven. Turn down the input level control, or reduce the output level from the signal source.
Operating Manual - Powerflex Multi-Channel Power Amplifier 13. SPECIFICATIONS Typical Idle Current Powerflex 6250 120V: 0.81A 240V: 0.42A *Power Output (Maximum Average Power, 0.1% THD, 1KHz) Powerflex 4400 120V: 0.9A 240V: 0.
Operating Manual - Powerflex Multi-Channel Power Amplifier ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103 Phone: (716) 872-0010 Fax: (716) 872-0739 Toll Free (800) 828-6308 www.ashly.com 2001 by Ashly Audio Corporation. All rights reserved worldwide.
