TDL Studio 1 loudspeaker
TDL is part of ELAC, one of the most successful OEM drive-unit manufacturers in the UK, particularly renowned for the 1" aluminum-dome tweeter that they make for Monitor Audio, Acoustic Energy, and British Fidelity. Perhaps of even more interest to readers of Stereophile is that the TDL system designer is one John Wright, who designed the classic series of IMF loudspeakers and who also was one of the leading equipment reviewers in the UK back in the 1960s. (For a while John was also a contributor to this magazine, his comprehensive reviews of tonearms appearing in Vol.2 Nos.10 & 12.)
For anyone who wants to be up to date on all the audio products available in North America, Audio's Annual Equipment Directory is an indispensable source of information. (So is the publication you're reading now, of course.) The 1992 Directory (aka Audio's October issue) arrived when I was finishing up the review of the Acarian Alón IV (see
New England Audio Resource's NEAR-50M is a cyborg: metal innards in a wooden body. It represents NEAR's top statement in the firm's Metal Diaphragm Technology speaker line, which features the "NEAR-Perfect" driver cone. Metalin this case an anodized aluminum alloyis much more rigid than paper or plastic. Hence, a driver with a metal cone acts more nearly as a true piston. When it comes to loudspeaker cones, breaking up is not hard to do. When that happens, the cone flexes in a complex pattern, generating harmonic distortion. A typical plastic or paper 8" woofer may experience its first breakup mode at a frequency as low as 500Hz. The NEAR 8" metal-cone woofer's first breakup mode is said to be well above 2kHz, and their 4" metal-cone midrange does much better than that.