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Formula One motor racing and loudspeaker design might seem worlds apart, but a clear understanding of aerodynamics and the effects of air turbulence and drag is one of the key considerations in the design of PMC's Advanced Transmission Line bass loading, found in its new twenty5 series of loudspeakers. PMC's head of design, Oliver Thomas, has some experience in the motor sport, and has used his knowledge to develop an aerodynamic Advanced Transmission Line (ATL) bass loading Laminair vent that's employed in the five-strong loudspeaker series to reduce resistance and increase efficiency.

Additional innovations incorporated throughout the new series include a new long-throw mid/bass driver with woven glass fibre cones, as well as refinements to its established Sonolex fabric dome tweeter to improve dispersion for a wider soundstage, says PMC. As with previous speakers from the company, the new series has slopping front and rear baffles. 

Launched at the High End Show in Munich to mark the company's 25th anniversary, the series includes models designed for different-sized listening rooms and comprises two standmount and three floorstanding loudspeakers. The two-way twenty5.21 (£1,870) and twenty5.22 (£2,450) models incorporate a 27mm tweeter partnered with a 140mm and 170mm long-throw mid/bass driver respectively. The twenty5.23 (£2,970)and twenty5.24 (£4,250) floorstanders are also two-way designs and share the same tweeter and mid/bass divers found on the 21 and 22 standmounts. The flagship of the series is the three-way twenty5.26 floorstander (£6,995), which has the same 27mm tweeter partnered with a 50mm midrange driver and 177mm bass driver. 

All models are available in a choice of oak, walnut and amarone real-wood veneer finishes plus a high gloss black option. The cloth speaker grilles have magnetic fixings, and a matching twenty5 series speaker stand is available, costing an additional £295. Click here for more.