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Multi-channel power amplifiers
Altec Lansing Pr
Altec Lansing Professional
Altec Lansing Pr
Altec Lansing Pr
Altec Lansing Pr
A division of Altec Lansing Technologies Inc, Milford PA 18337-0277 Made In USA
6125A
4200A
ofessional
ofessional
ofessional
ofessional
1000 W. Wilshire Blvd. Suite 362
Oklahoma City, OK 73116 USA
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Table of Contents
Related Manuals for Altec Lansing 4200A
Summary of Contents for Altec Lansing 4200A
- Page 1 Altec Lansing Pr Altec Lansing Professional Altec Lansing Pr Altec Lansing Pr 1000 W. Wilshire Blvd. Suite 362 Oklahoma City, OK 73116 USA A division of Altec Lansing Technologies Inc, Milford PA 18337-0277 Made In USA 6125A 4200A ofessional ofessional ofessional...
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Page 2: Table Of Contents
Operating Manual 6125A and 4200A Multi-Channel Power Amplifier Table Of Contents INTRODUCTION ........... 4 UNPACKING . - Page 3 Operating Manual 6125A and 4200A Multi-Channel Power Amplifier 10 DESIGN THEORY ..........13 11 TROUBLESHOOTING TIPS .
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Page 4: Introduction
Operating Manual 6125A and 4200A Multi-Channel Power Amplifier INTRODUCTION The 6125A and 4200A power amplifiers combine the efficiency of a MOSFET high-speed switching output stage with the sophistication of modern microprocessor and DSP technology to produce a multi-channel amplifier with unprecedented versatility and power in a single 3RU pack- age. -
Page 5: Cable Requirements
Operating Manual 6125A and 4200A Multi-Channel Power Amplifier CABLE REQUIREMENTS Input Cables Be sure to use shielded cable whether balanced or unbalanced. Shielding which is properly grounded will protect the signal from outside electrical interference such as RF, fluorescent lighting, and computer/display emis- sions. -
Page 6: Front Panel Features
Operating Manual 6125A and 4200A Multi-Channel Power Amplifier FRONT PANEL FEATURES Power Switch When the unit is switched on there is a five sec- ond delay, during which time the PROTECT circuit will activate, disconnecting the speakers from the amplifier output. -
Page 7: Rear Panel Features
The 6125A is essentially three stereo amplifiers in one chassis, for a total of up to six separate channels. The 4200A is essentially two stereo amplifiers in one chas- sis, for a total of up to four separate channels. Thus, the... -
Page 8: Input Level Controls
The 6125A is capable of three channels of bridged output (two channels on the 4200A). To use bridged mode, first press MONO from the Stereo/Mono switch on the channel pair to be bridged. This sends the same audio signal to both channels. -
Page 9: Ac Inlet
Operating Manual 6125A and 4200A Multi-Channel Power Amplifier Model 6125A shown. Model 4200A has only four channels. AC Inlet The 6125A and 4200A amplifiers can be config- ured by the customer for operation at either 115VAC or 230VAC mains. Switching from one to the other simply requires the following steps: 1.) Unplug the amplifier from the wall and re-... -
Page 10: Power Supply Undervoltage
Euroblock connectors, while speaker outputs are wired to four position screw terminal blocks. Note: The 6125A is used for the following application details, but the 4200A is used in a similar fashion, to a maximum of four channels. High frequency (20kHz to... -
Page 11: Six Channel Setup
Operating Manual 6125A and 4200A Multi-Channel Power Amplifier 9.1 Six Channel Setup Six Channel Setup (dual stereo) Input Section: Up to Six Different Inputs Stereo/Mono Switches - Out Dual Bridge Switches - Out Levels Controls - Used Per Input Channel Up To Six Different Amplifier Inputs 9.2 Dual Mono Setup... -
Page 12: Bridged Mono Setup
Operating Manual 6125A and 4200A Multi-Channel Power Amplifier 9.3 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 Amplifier Inputs 9.4 Typical PA Setup... -
Page 13: Design Theory
A and class AB linear ampli- fiers. (see Specification Notes at end of this section) In the 6125A and 4200A, the input signal is re- ceived by a single operational amplifier configured as a difference amplifier to reduce common-mode effects from sources located at a distance. -
Page 14: Distorted Sound
Operating Manual 6125A and 4200A 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 from the sig- nal source. 2.) Clip LED is not flashing at all Amplifier input signal may be exceeding input headroom, which is greater than +12dBu, or 3.4V rms... -
Page 15: Specifications
Operating Manual 6125A and 4200A Multi-Channel Power Amplifier SPECIFICATIONS *Power Output (Maximum Average Power, 0.1% THD, 1KHz) Rated Per Channel, Two Channels Driven 6125A 4 ohm: 250 Watts RMS 8 ohm: 150 Watts RMS Mono Bridged (1 Channel) 8 ohm:... - Page 16 Operating Manual 6125A and 4200A Multi-Channel Power Amplifier Altec Lansing Pr Altec Lansing Pr Altec Lansing Pr Altec Lansing Pr Altec Lansing Professional A division of Altec Lansing Technologies Inc, Milford PA 18337-0277 Made In USA Printed in USA ofessional ofessional ofessional ofessional 1000 W.