Hello pipo I use my Bluetooth box for everything. However, when I want to pair it with the record player again, I briefly switch off the power to the Phonobox. When I switch it on, the Phonobox automatically connects to the nearest Bluetooth speaker. I mean, the connection even remains as long as you don't pair the soundbar with anything else. Greetings Tobi

you need either an amp with a Bluetooth channel, or a receiver of the type: Logitech Bluetooth Audio-Receiver (Receiver)

According to my information, the Pro-Ject Phono Box E BT 5 is pairable with a Bluetooth box because it has an integrated Bluetooth interface. To pair the preamplifier with a Bluetooth box, the preamplifier must first be set to pairing mode. No additional app is required to pair the preamplifier with a Bluetooth box.