PMC Twenty5 21 Loudspeakers (Pair)

The twenty5.21 is proof that great things come in small packages. Don’t let its compact size fool you; this loudspeaker is nothing less than remarkable. Its complex ATL and Laminair  vent mean that you get speed, weight and transparency, with the greatest bass extension of any loudspeaker this size.

Whether on a shelf or its performance-enhancing stand, the twenty5.21 excels with all types of music. Its articulate mid-range, clear, open highs and profound bass mean it can fill rooms both medium and small with astonishing ease.

The source of PMC’s legendary natural and wholly realistic sound is the Advanced Transmission Line (ATL) bass-loading technology. ATL is an ingenious design and uses energy generated by the bass unit in a much more intelligent, efficient way than speaker designs based on ported or sealed boxes. In ATL loudspeakers, the highly braced cabinet is lined with a multitude of custom-designed acoustic materials that absorb all but the very lowest frequencies. These exit from a front-panel vent, extending the low-frequency response, and creating the impression of a far larger speaker with an extra, ultra-high quality bass unit. ATL improves more than just the bass response: because the low end is clean and clear, it doesn’t mask the rest of the music. Vocals, in particular, are beautifully projected and ultra-vivid. ATL loudspeakers offer another benefit. The ATL bass extension does not change with volume level — so even when listening quietly, the bass sounds balanced and well defined.