Lyngdorf Millennium Mk IV Integrated Amplifier

No Longer Available


SKU: Millennium Mk IV
Brand: Lyngdorf


The Millennium Mk IV is the Lyngdorf reference amplifier – its speed, precision and incredible dynamic range has taken the world by storm. Not to mention the unique volume control working with the precision of Swiss clockwork.

If you are looking for unconstrained sound, speed and the ultimate sense of freedom this is it!
The incredible dynamic range of the Millennium Mk IV integrated amplifier creates a musical experience where the completely “black” silence enhances the finest musical details.

The Millennium Mk IV is much more than an amplifier – some call it a “Power DAC” – but in fact it is a complete digital control center replacing a D/A converter, equalizer, pre-amplifier and power amplifier.

The Mk IV version is a new mechanical and electrical design with completely revised power output boards increasing the maximum output current to staggering +/- 60A. This is your guarantee that even the toughest speaker load will be controlled effortlessly.

Despite that this is probably the most technologically advanced products of its kind  – simplicity is the keyword for its design. Dominated by the massive aluminium front plate and the eye catching and “cool” volume wheel. If you have once spun it, you will never want to use anything else.

Compromise? You won’t find it here!

True Digital Amplifier

In principle, the output stage of most switching amplifiers has the same working principle. PWM = Pulse Width Modulation is simply a matter of variable open/close time of the transistors. Simplified, you can compare the transistors in the output stage to two switches.

Power Supply and Volume control

The Lyngdorf true digital amplifiers are based on non-feedback construction, which means there are no differences in the THD performance at any frequency when it comes to the output stage. In other words, the distortion is very low and linear. However, another major influential factor to the THD performance of a fully digital amplifier is the quality of the power supply.

With the Lyngdorf power suppliers we have obtained completely identical and very low impedance which gives a completely flat THD at all frequencies. This is simply a necessity for a high performance implementation of a true digital amplifier.

The power supply uses a toroidal transformer and the advantage of this over a conventional C or El core transformer is significantly less magnetic radiation, something which can potentially induce noise (50/60Hz) which would be very audible.The supplies for the output stage and the microprocessors are kept completely separate since they use separate windings on the transformer.

However, the truly unique aspect of the power supplies in the Lyngdorf true digital amplifiers is that it actually works as the volume control of the product. When you are playing at low volume levels, the voltage supplied to the output stage is low – when you turn up the volume control you increase the voltage, and thereby the output, from the amplifier. This is implemented as a DC-DC converter. On the “primary” side full voltage is constantly applied and then the DC-DC converter switches the voltage needed for a given setting of the volume control to the “secondary” side (= the voltage supplied to the output stage).

In order to be able to turn down the volume fast again, the DC-DC converter can, quite uniquely, switch the power back to the “primary” side. The result of this truly unique way of controlling the volume level is that a Lyngdorf true digital amplifier gives full dynamic range from maximum volume and down to the 62dB reading in the volume control (which corresponds to as little as 1V RMS on the speaker terminals). This is due to the fact that when the supply voltage to the output stage is reduced, then you lower both the output signal AND the noise floor; and thus the full dynamic range is maintained – also at low volume levels. Perhaps this is one of the reasons why reviewers often mention that Lyngdorf amplifiers play equally well whether you’re playing at high or low volume levels.


The powerful DSP “engine” allows you to customize a speaker set-up completely to your preferences. The built-in x-over filter functionality allows you to both control conventional passive speakers, substitute the normal x-over in a 2-way speaker or use it as the x-over filter between main speakers and woofer(s) – e.g. in a Lyngdorf Audio 2+2 set-up.

Also, multi-way systems can be controlled by using daisy-chained Lyngdorf Audio products. For example you can use a single amplifier as the “master” of the system to handle the high range (treble) and send the low-pass filtered signal to a “slave” amplifier which then powers the midrange but then sends a further low-pass filtered signal to a power amplifier that handles the bass frequencies.

So, when combined with other Lyngdorf products, the DSP allows a wide range of system configuration options. From “simple” rigs to very advanced set-ups! What’s more, the DSP section can also be used for simple but effective equalization since it also features:

A global equalizer for overall room equalizationSeparate equalizers for left/right and main/line channels to compensate for shortcomings in the audio chain.A very powerful “broadband” voicing equalizer allowing you to “tilt” the sonic balance to your personal preferences.Gain control (left/right and main/line channel) for optimum balance adjustment.Delay control (left/right and main/line channel) for optimum time alignment (ensures that the sound from different drivers or speakers will arrive simultaneously at the listening position).

Input (minimizing jitter)

Normally, jitter is related to domain changes – i.e. when going from the digital to the analog domain or vice versa. This is also why keeping the signal in one domain for as long as possible per definition is the best solution. However, one of the most important factors in digital signal processing is the “purity” of the clock, in other words, ensuring that the master clock that controls everything is extremely stable and correctly placed (electrically as close as possible to where the clock frequency is needed). In every one of our R&D tests we have concluded that keeping phase noise as low as possible in the clock system is the single most important factor in minimising jitter. Typically jitter is heard as high frequency distortion. That’s why we have always given the design of the clock a very high priority – in fact this is one of Lyngdorf core competencies!

We employ specialised low-noise design techniques to reduce digital interference and to give better working conditions for critical parts such as the modulator (PCM -> PWM) and converters, which are especially sensitive to noise.

To minimise jitter further, the sample rate of the input signal is measured to determine the exact sample rate where after it is re-sampled to match the master clock (although the input is stated at e.g. 96kHz it can easily “float” slightly both up and down).

The result of this meticulous design philosophy speaks for itself, as a pure, clean and natural sound reproduction.

Additional information

Weight 0.00000000 lbs


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