RCA / USB Micro B / 3.5 mini jack / Bluetooth.
Check the v40 Connection Guide

Any 4/8 ohm passive loudspeakers, or our ps40 speakers which have been sonically matched with v40.

If your Turntable has a built in Phono stage you can connect directly, however if it doesn’t you will need to add a separate Phono Preamp.

The amplifier will be operational after a minute or so, but optimum performance will take 10 – 15 minutes

Press the Mute Button on the remote control for 2 seconds and release
An audible beep will confirm Reset
This will return the v40 to the default volume and tone setting and erase all BT devices in the memory.

No, never leave your amplifier on when not in use and never leave it unattended.

aptX is an audio codec designed to deliver CD quality audio over Bluetooth. An improvement in audio quality can be expected if a source device has the aptX function.

Check your device Setup/Settings/Applications – or check your device manual.
A list of devices currently using aptX can be found here
http://www.csr.com/technology-solutions/av/audio-products-powered-by-csr-aptx/
(by courtesy of CSR).