B&W 601

DM 601 measures just 356x204x244mm, or 14x8x9.6 inches (HxWxD), and weighs in at 6.1 kilos (13.4 lb). In my book, this is called a small speaker, though the weight is a little above the norm in this class. The sales literature describes it as a "2- way 4th-order vented system", or a bass reflex ported speaker. It uses two drivers, a 165mm (6.5 inch) mid/bass driver and a metal coated 25mm (1") dome tweeter. Crossover is at 4 kHz, efficiency is rated at 88dB/1W/1m, impedance is said to be 8 Ohms nominal (4.3 Ohms minimum - kudos to B&W for quoting the worst case!), and response is said to be 70Hz-20kHz +/- 3dB on axis. Dispersion is also quoted, something I wish other speaker manufacturers would also pick up as a habit, at within 2dB at 40 degrees horizontal and 10 degrees vertical. Harmonic distortion is said to below 1% 88-20.000 Hz at 90dB SPL at 1m. Power handling is said to be 25-100W continuous of unclipped programme into 8 Ohms nominal - impressive for what is supposed to be small speaker.