It has a 100 mm subwoofer designed for a deep and enjoyable low end and four 40 mm full range drivers to cover everything. (soundguys.com)
The speaker uses two 2» (50 mm) full range drivers powered by a two - channel amplifier, while the two passive radiators create fuller bass response. (polkaudio.com)
The X12i's exceptionally lightweight, narrow earpieces make for a secure fit, and the full - range drivers in each ear provide a well - balanced, mids - focused listening experience that neither neglects nor overly boosts the bass. (pcmag.com)