pre-amp processor

So, did some searching around.  I have never been able to find an internal pic of either of these processors, but it seems like there are a couple pages showing internal of the previous MP-50:

https://www.on-mag.fr/index.php/video-hd/tests-bancs-essai/18610-test-preampli-processeur-home-cinema-lyngdorf-mp-50-quand-le-home-cinema-rencontre-la-hifi-d-excellence

https://www.mjtaoyuansound.com.tw/news/68

Both pictures show that the Lyngdorf is run off a switching power supply.  This would be one reason I would avoid the Lyngdorf (even though many people rave about this processor).

Both the MP-50 and the new MP-60 are exactly 19lbs in weight, so I can only assume the MP-60 is also based on a switching power supply.

The Acurus ACT 4 is 25 lbs in weight.  Ah, here's a thread that has an internal pic:

https://www.avforums.com/threads/acurus-act-4-av-processor-review-comments.2179061/page-2

It seems the ACT 4 is also based on a switching power supply.  It's up to you, but at this point, I would not consider either processor.  I would probably go for the McIntosh MX-160 (which is a Lyngdorf digital processing platform with McIntosh linear power supplies and analog stages).

I hope , you will let us know , which one you choose .

I you buy a used processor ;  Acurus warranty is for the first owner only.

It looks like the room correction on the Lyngdorf works the best also 8k.

The Acurus warranty is far superior than any other brand and USA made.

maxwave you have the act 4 how simple was it to calibrate and set it up?

the Lyngdorf has 5 2.1 hdmi in and 2 out

the Acurus has 8 21. ready in and one out

I'm still torn between the 2 units with Anthem AVM 90 close behind

What do you think?

The Lyngdorf’s room correction is at a higher level.  The effects of superior room correction can be huge and I think would overwhelm any other differences.  Just an educated guess though.  Best of luck.