You can absolutely still use the B1, and it will sound great. aptX® is a high quality Bluetooth audio codec that works really well. With that said, in addition to mandatory support for SBC, Bluetooth also includes optional support for many other codecs, like MPEG-1, MPEG-2, MPEG-4, and AAC, all of which have their own advantages, and some of which sound very close to aptX®.

Yes, any audio product with a standard analog audio input can connect to B1 with the included RCAs. B1 also includes a digital output so you also can connect via optical (TOSLINK).

No extra software or drivers are needed. The B1 is compatible with any device that supports Bluetooth, and the A2DP profile for streaming stereo audio. This includes most all Smartphones, Tablets, and Laptop Computers.

Yes, you can still use the B1 with the original A5 model! With this kind of setup, you'd just need to use either an RCA to mini-stereo adapter (like the one that was included with your A5s) or an RCA to mini-stereo cable. You would just connect the RCA end into the RCA outputs of the B1 and the connect the mini-stereo side to either the top or back mini-stereo inputs of the A5s.

Setting up your Bluetooth turntable with your Bluetooth-ready Audioengine speakers/components should be simple! First, you would also need to make sure your Audioengine Bluetooth device is on, in pair mode (LED light flashing), and near the turntable. Next, you would need to use the pairing button to send the turntable into pairing mode. Depending on the turntable, you will need to either press and release the turntable's pair button or press and hold it; for example, on the Audio Technica AT-LP60-BT you would need to hold the turntable's pairing button for about two seconds, until the light flashes different colors. Once the turntable is in pairing mode, it will search and connect to the nearest available Bluetooth device. Once the turntable if paired and connected to your Audioengine Bluetooth device, the pair light on the receiver should turn solid.