The 'i' versions are the brand-new upgrade to the entire Q Acoustics range. The upgrades include a new tweeter and an improved crossover, plus an everything-but-the-cabinet makeover for the Q1000Si subwoofer.
Full review of the Q Acoustics 1010i 5.1 package in current, Awards issue, with reviews of 1010i and 1020i stereo pairs in our December issue, out November 15th.