Loudspeakers

I’m a sucker for a bit of extreme hi-fi, so how could I resist the UK’s first review of what is billed as the world’s most powerful domestic subwoofer. Velodyne’s DD-1812 Signature Edition is a 176kg beast with two 1250W Class D amps driving twin drivers in a true two-way configuration. Low frequency duties are split between a 12in carbon-laminate driver at the top and a whopping great 18in version for the really deep-down stuff south of approximately 35Hz. The name 1812 is a rather dull reference to the driver dimensions and not Tchaikovsky’s masterpiece of that year, which would have been so much more appealing given the piece’s famous low frequency thunder.

For readers whose knowledge of particle physics is as lamentable as mine, the muon is the name given to an important elementary particle and one that has a relatively extended lifetime of 2. 2µsec. Muons are difficult to create – something which unquestionably applies to these Ross Lovegrove designed KEFs too, whose superformed aluminium cabinet takes about 160 man-hours to manufacture the shining megaliths you see here. Numbers for the Muon are impressive even before you get to its £70,000 price tag (per pair).

Purists will never yield on the topic of full-range electrostatic vs hybrid. The reality is that ESLs need to be huge if they’re to deliver deep bass and high SPLs. So mazel tov to those who can house and afford, say, big Sound Labs. For the rest of us, hybrids are a sane compromise.

Smallest of Leema Acoustics’ six-model speaker range, the Xero really is tiny at just 220x140x205mm (hwd), its front baffle having only about half the area of this magazine’s front cover. The moulding that houses the two pairs of input sockets for the split crossover occupies much of the rear panel, with just room for a small reflex port beneath, while the minuscule bass-mid driver at the front has an effective diameter of only about 80mm – little more than three inches. So this is a speaker for people with small listening rooms or who insist on their speakers having the smallest possible footprint. To this end the Xero can be wall mounted although for best sound its manufacturer rightly recommends using sturdy floor stands.

Has it really been more than 20 years since Acoustic Energy bridged the worlds of professional studio monitoring and domestic audio? Back in ’88, the former regarded the latter in the way that, say, Labour regards fiscal responsibility. AE was having none of it, and produced a classy, compact two-way monitor of true studio merit, sort of a UK answer to Wilson’s WATT. Given its diminuitive stature, most noteworthy was the AE1’s prodigious bass. Rear-ported and boasting a still-radical metal mid/bass driver, it begged to be positioned away from walls on solid 24in stands.

In this era of DSP room correction systems, surprisingly few loudspeaker manufacturers seem to be looking at the issue of room interaction from the speaker design angle, trying to find ways to quell the room’s influence and thus, potentially, render DSP assistance redundant. Danish company Dali is an exception, although to look at the Helicon 400 Mk2 you could be forgiven for thinking that it is an entirely conventional direct-radiating floorstander. The giveaway, although its significance may not be immediately obvious, is the trademark Dali twin tweeter module which combines a 25mm soft-dome unit with a leaf supertweeter whose diaphragm is 10mm wide by 55mm high. Supertweeters are normally deployed these days to extend response out to low ultrasonic frequencies but the Dali supertweeter also has an important function within the audible range, where it takes over from the dome tweeter at 13kHz.

I didn’t need much persuading to audition this sumptuous pair of floorstanders made by Revel, one of its flagship Ultima2 range. Priced a cool £11,000 they exude opulence from their sculpted front baffles in gloss black, highly lacquered cabinets finished in real wood veneer (ours were the mahogany version; also available in piano black) and hi-tech drive units. Revel’s Ultima2 range comprises the Studio2 that we have here, an even larger model called Salon2, a slim bookshelf that’s suitable for on-wall use dubbed Gem2 and the Voice2 centre speaker. Commensurate with price, attention to detail is fastidious; to ensure that each Ultima2 loudspeaker is matched to within a fraction of a decibel to its prototype reference, a final tuning process is conducted on all production units to ensure absolute uniformity.