The SDR-play RSP1A is a major upgrade to the popular RSP1 and is a powerful wideband full featured 14-bit SDR which covers the RF spectrum from 1 kHz to 2GHz.
RSPduo - launch video
Newcomers to SDR and SDRplay
Announcing the RSP1A
RS-Components - setting up an RSP1A from scratch
SDRplay Raspberry Pi3 setup for RSP
Introducing the SDRplay RSP2
About SDRplay - the history behind the RSP