You can only connect analogue signals, which means the signal should be of good quality. The speakers themselves have a super quality and are highly recommended. You should only use a good sound card if you want to use the speakers on your PC. I use an Asus Xonar.
They are not Buetooth Integrated speakers, you can use them via Cinch or 3.5 Jack...if you do so, you can connect them to your Smartphone and play music over Spotify as usual.
I guess it depends a bit on the outputs of your turntable. If it has an analogue output, Cinch for example, then it should work. USB probably only via a computer.
All cables are included. The speakers are connected to the computer with the 3.5mm mini-jack to mini-jack audio cable, 2 metres:
Instruction manual:
https://static.digitecgalaxus.ch/Files...
Left speaker has 2x 50-watts Class AB amplifier. Right speaker is passive, so it is possible to connect another speaker, but different speakers will degrade stereo image! Two speakers connected in parallel will load the amplifier with low impedance and may cause overload.
As far a we know, there is no specific speaker stand to this model. We recommend an universal stand.
The bottom plate of the speaker is D: 230mm / W: 180
Therefore we could reccomend Dynaudio Stand3x matt Schwarz - 1 Paar (Ständer) for example (but maybe not high enough for usage beside the desk)