REW will work on your setup. An AVR isn't needed. you just need an analog audio input on the Preamp to connect your laptop/ Soundcard to and you'll be good to go.
You'll be restricted in your tuning tools, however, to tone controls, speaker placement in room, seating position and subwoofer placement/ subwoofer setting controls, only. Which, in reality, is probably all you'll need. I've had great results with REW in 2-channel systems by using just speaker placement and proper subwoofer integration.
You'll be restricted in your tuning tools, however, to tone controls, speaker placement in room, seating position and subwoofer placement/ subwoofer setting controls, only. Which, in reality, is probably all you'll need. I've had great results with REW in 2-channel systems by using just speaker placement and proper subwoofer integration.