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LC audio Millennium User Manual

Audio power amplifier
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The End
Millennium
Audio Power Amplifier.
Cook Book.
The End Millennium is a high quality Power Amplifier, in power sizes of 99 to 300 Watts (8 Ohms).
While running in Class A/B the high sound quality is reached through a number of advanced
design strategies. First of all no feedback loops is found in the circuit, as any error that might be
corrected by the feedback loop, cannot be corrected before it is factual, and then - obviously - it
is too late. A simple circuit topology with a minimum of high quality components ensures short signal
path. Polyprop Capacitors, Vertical bipolar multi emitter transistors, glass substrate resistors to
mention some of the high-tech components used.
The higher frequencies are played with simplicity through the ultra fast amplifier (linear to >500.000Hz)
and the four stage output power tunnel gives a firm and fast bass reproduction. The total soundstage
is well controlled and well defined, with precise space and nerve visuality.

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Summary of Contents for LC audio Millennium

  • Page 1 Audio Power Amplifier. Cook Book. The End Millennium is a high quality Power Amplifier, in power sizes of 99 to 300 Watts (8 Ohms). While running in Class A/B the high sound quality is reached through a number of advanced design strategies.

  • Page 2: Table Of Contents

    Content. Adjustment procedure Assembly Instructions Cabinet description Connection of inputs Connection of the outputs Connections to the ext. Boards High Power Systems based on Millennium Nonfeedback = Musicality! Parts List PCB Sketch Power Supply Considerations Principle behind the Millennium Schematic Use of the DC Servo Further information: www.lcaudio.com...

  • Page 3: Principle Behind The Millennium

    Millennium! The Millennium module also contains extra functions such as DC servo and an effective short circuit protection. The protection will monitor if any overload is evident, and then shut down for a couple of seconds.

  • Page 4: Nonfeedback = Musicality

    Another way to detect modulation is when an amplifier changes sound when the volume is raised or lowered. In The End Millennium the sound is exactly the same no matter what playing level is required. It uses a quite different technique to eliminate distortion. In a non-feedback topology there is no possibility to remove distortion once it is evident, so every method has to be enforced to avoid distortion.

  • Page 5: High Power Systems Based On Millennium

    High Power Millennium Systems. A basic Millennium amplifer is designed to run on a 33-0-33 V transformer and put out 120 Watts in 8 Ohms / 240 Watts in 4 Ohms. By adding an extra set of power transistors on an ext.
  • Page 6 Any Scandinavian DYI audist know The End in former version 3.1. More than 3600 of this kit was built in the period from 1995 to 1999 where Millennium took over. Nearly every one of these 3600 units runs today and provides remarkable high sound quality in hundreds of Different sound systems.

  • Page 7: Power Supply Considerations

    10.000u 10.000u on the amplifier boards. MAIN - BLACK The End Millennium L C Audio Technology Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.

  • Page 8: Schematic

    American made MicroFarads, and provides all the stability and musclepower needed to drive even critical speaker loads. The brand ChemiCon is formerly known as Sprague. Complete Schematic. The End Millennium Ground if unbalanced input signal is used. The End Millennium L C Audio Technology...

  • Page 9: Pcb Sketch

    Note Not 1:1 Measures : 107 by 54 mm. The End Millennium L C Audio Technology Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.
  • Page 10 -30-70V AUX supply. BIAS testpoint BIAS testpoint +30-70V +30-70V AUX Supply. The End Millennium L C Audio Technology Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.

  • Page 11: Parts List

    1 Jumper for DC Servo Components not mentioned above are already fitted on the board as SMD's The End Millennium L C Audio Technology Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.

  • Page 12: Assembly Instructions

    Building Instruction. Assembling the Millennium is easy and consumes little time. Start by pouring all the components in the package out on Your table. Get Your Soldering iron heated. Start by mounting the lowprofile components, like resistors and trimmers. Follow the printed values on the PCB itself, and compare with the color codes printed on the previous page.
  • Page 13 (recommended) You are required to cut the thin PCB tracks between + and AUX+, and also between - and AUX - The End Millennium L C Audio Technology Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.

  • Page 14: Connection Of Inputs

    Both input plugs may be used simultanously, just leave the -input unshorted to gnd, and connect both plugs. The End Millennium L C Audio Technology Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.

  • Page 15: Connection Of The Outputs

    We recommend mounting the ZOBEL network on every output. The required parts are included in the kit. The End Millennium L C Audio Technology Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.

  • Page 16: Connections To The Ext. Boards

    Remember Zobel network. though not shown on this drawing. The End Millennium L C Audio Technology Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.

  • Page 17: Adjustment Procedure

    Connect Your speakers, and start playing! Note a burnin period of 1-2 weeks is to be expected for optimal sound performance. The End Millennium L C Audio Technology Copying and distribution of this material is allowed, but any commercial use is strictly prohibited without the written permission of L C Audio Technology.

  • Page 18: Use Of The Dc Servo

    10-20 Hz. In the Millennium we have put a great effort into making a DC servo that would not affect the bass. The cutoff frequency is as low as 0,5 Hz, and there is a second order filter instead of the normal first order types.
  • Page 19 1 Super Power Supply Mk2 120.000uF/63V 1 Cabinet kit 1 Set WBT b.p.. screws, RCA's, power cord+++ 180W stereo system: 2 The End ext. Millennium kit 4 Heatsinks 1 Transformer 2 X 40V 700 VA 1 Aux. Transformer 2 X 40V 30 VA 1 Super Power Supply Mk2 120.000uF/63V...

  • Page 20: Cabinet Description

    The PowerTrend Cabinet. The End Millennium is easily built in out PowerTrend cabinet that gives a discrete and powerful impression. You may also use Your own cabinet design if You prefer, and in such case You can leave out the cabinet from Your order.

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