This is a review and detailed measurements of the Lyngdorf MP-40 version 2.1 12-channel Audio/Video Processor. It is on kind loan from a member and costs US $11,299.
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Apologies for lousy beauty shot. I did not want to remove the protective plastics. I was very pleased to see a "real" volume control with flywheel momentum and very responsive input selection knob. A highly useful web interface is provided which I used to configure the unit. In addition to being an AV Processor, the MP-40 can also act as a USB DAC (a rarity in AV products) and supports Roon streaming over the network, both of which I tested below.
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The unit is targeted at the Custom Integration (CI) channel as evidenced by extensive triggering functionality and such things as serial interface. Not many HDMI inputs are provided though.
Lyngdorf MP-40 2.1 AV Processor Measurements
Let's start by testing HDMI input and measuring noise+distortion:
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Channel 2 has excellent performance ranking at the top of our SINAD tier. Sadly distortion is higher in Channel 1 (Left) bringing their average a couple of notches lower:
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Bits should be bits and MP-40 shows this by having identical performance with both USB input and Streaming:
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It is easier for me to test using USB input so that is what you will see in the rest of the tests. Output goes up to a healthy 8 volts:
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Unlike some other AV products, the volume control does not change the gain structure. You just get less output voltage which is one expects. You can see that performance is maintained almost up to max output. We see that lower performing channel takes a hit at just 1.4 volt. Very strange.
Linearity also shows a strange negative tilt at lower levels:
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IMD performance is very good by AV standards:
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Here, we see an increase in distortion at around -8 dB which is likely due to 60 Hz component in this test. We see that increase in THD+N vs frequency:
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For compatibility with stereophile testing, here is 50 Hz response into a very low load impedance:
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Jitter performance is again good for an AV product:
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I did not see a configurable filter but what is there is good:
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It does droop a bit in frequency response though:
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Conclusions
The build quality and feature set of MP-40 V2.1 is excellent. Measured performance seems very good, just stopping the best we have tested. I am wondering whether there are part variations that caused the one channel to underperform. One main feature,
RoomPerfect EQ, was tested before and turns in excellent performance. So as a package, I expect this processor to perform quite well. Some of you may know that the company/its founder have funded Purifi amplifier companies. Seeing how they squeeze every bit of distortion and noise out of their products, I am hoping that the same gets done in their processors in the future.
I am going to put the Lyngdorf MP-40 V 2.1 on my recommended list.
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