I would never have noticed this negatively with my device, but I'm also more of a beginner when it comes to vinyl and can't compare it with other devices.

The following item is compatible with the Denon DP-400: Audio Technica ATN3600L.

No, no Bluetooth!

If you need spare parts, please contact our customer service. We can then make a request to the supplier :) => https://helpcenter.digitec.ch/hc/fr/requests/new

Not that I know of!

In this case, please contact our customer service directly so that your request can be checked. https://www.digitec.ch/de/information/contactinformation

Just needs the right cable. e.g. something like this Value Stereo jack - 2x Cinch (5m, Entry, 3.5mm jack, Cinch)

https://www.denon-hifi.ch/chg/product/hifi/turntable/dp400

No problem. The record player plays old and new vinyl (33s/45s/78s) without any problems.

The Denon record player has a built-in preamplifier, so you can connect the record player to the two cinch connections of the Sonos port. In fact, you can connect it to any device that has a line-in input (with a jack, you only need a different cable). If you decide to use a different one, make sure that the preamplifier is built into the turntable or, alternatively, buy a separate one. Otherwise, you won't get enough signal for the Sonos port to be able to use it.