Boston Acoustics “Hospitality Mode”
This one’s for the personal knowledge base:
Boston Acoustics Horizon I-Duo Volume limit problem: Mine came with “hospitality mode” enabled, and volume would not go past 19. To fix: turn on unit, turn volume all the way down to 00, push and hold volume button for 10 seconds until beep then release, then turn volume all the way up to 50 (max) and push and release volume button.
From an Amazon.com customer review.

