Quintet10

Four 10-inch woofers in a column with the mid/high module in the middle of them, 1.6 m of baffle and still only 42 cm wide — the wall-of-sound arrangement done at the scale of the 10-inch range rather than the 15. Splitting the bass across four OB-M10EXT drivers instead of two larger ones is what buys the extra octave: 39 Hz in an ordinary room and, PureAudioProject says, 29 Hz in a room that helps. The centre is chosen at order — the PAP-Horn2 compression driver, a Voxativ AC-1.6 widebander or a Heil AMT — and each comes with its own first-order crossover, the Voxativ version on open gold terminals so it can be tuned by ear. 89 dB and a nominal 8 ohms, which the maker says is undemanding enough for valve, Class A/AB and Class D alike. Baffles in HDF, oiled bamboo or smoked German oak with anti-vibration inserts; it arrives flat-packed and unassembled, and 32 kg per side is the built weight.