Stand Loudspeaker Reviews

Following my reports on 13 mainly inexpensive loudspeakers that have appeared in the last four issues of Stereophile, I thought I would give myself a treat this month by reviewing the latest incarnations of a model that has stood the test of time: the two-way Celestion SL600Si...This is a carefully tuned infinite-baffle design, sacrificing ultimate extension for upper-bass and lower-midrange quality. Its crossover is conventionally British in that it puts flatness of on-axis amplitude response ahead of time coherence, while everything about it, from drive-units to the cabinet itself, is flagrantly "high-tech."

I like Brooklyn. I even got married under the shadow of the Brooklyn Bridge! (Almost the exact spot where Cher's grandfather let his dogs howl at the moon in Moonstruck. And if you're ever in the Park Slope area, check out McFeeley's for brunch.) I could be forgiven, therefore, for having a soft spot for any Brooklyn manufacturer, including Ohm Acoustics. Except that the only Ohm model I have heard was the omnidirectional Ohm Walsh 5 (favorably reviewed by Dick Olsher in Stereophile in 1987, Vol.10 No.4, and 1988, Vol.11 No.8), and the omni principle is something that I have never found to work, or at least to give me what I feel necessary in reproduced sound. The Ohm Model 16, however, is one of three more conventional Coherent Audio Monitor (CAM) speakers intended to offer good sound at an affordable price: $300/pair

The Monitor Audio R300/MD ($669/pair) debuted at the 1988 SCES in Chicago. English company Monitor Audio is one of the pioneers in spreading the use of metal-dome tweeters in relatively low-cost loudspeaker systems. The tweeters they have designed in conjunction with SEAS and British manufacturer Elac may have now found their ways into a number of designs from competing manufacturers, but there is no doubt that Monitor leads the way. The new R300/MD features a new ¾" version of the SEAS 1" aluminum-dome unit Monitor introduced with their R652/MD (reviewed in Vol.10 No.5), in conjunction with an 8" doped paper-cone woofer.

A new name to me, West German company MB Quart GmbH is, in fact, the reincarnation of the Peerless loudspeaker company that until 1983 used to be owned by New York–based Electro Audio Dynamics (EAD). The company has been in existence for over 20 years and under either name has an excellent reputation for its drive-unit technology, MB being one of the first manufacturers to offer an OEM metal-dome tweeter. Their 1" titanium-dome unit, for example, was featured in Dick Olsher's Dahlia-Debra DIY design (footnote 1), and I became quite enamored of the effortlessly clean nature of that speaker's treble.

Probably best-known in recent years for their best-selling "baby" speaker, the Diamond, Wharfedale is one of the UK's oldest manufacturers of loudspeakers. The company was the subject of a management buyout earlier this year, following a rather unsettled period when it changed hands several times. Now with American distribution as of 1989 by Vector Research (footnote 1), the brand is reinventing itself in the US with two new ranges of loudspeakers, the 507.2 being one of the "audiophile" models. Both drive-units are made in-house; the first generation of Wharfedale loudspeakers to feature this 19mm aluminum-dome tweeter—the 506, 508, and 708—appeared in early 1985.

"Who">http://www.Stereophile.com//features/44/">Who Stole The Bass?" asked Anthony H. Cordesman, writing about minimonitors in the April/May 1987 Stereophile (Vol.10 No.3). And for the designer of a box loudspeaker, the fundamental design decision, at any price level, is how much bass extension to aim for. It will always be possible to design a speaker with extension down to 20Hz, but will the result be musically and commercially successful? Will the designer end up with a speaker hypertrophied in that one area at the expense of every other? Will, indeed, the result be feasible technically? For example, for a given cabinet volume, gains in low-frequency extension have to be balanced against corresponding drops in sensitivity, and it is quite possible that to go for 20Hz extension will result in a 60dB/W/m sensitivity, equating with a speaker that only plays extremely quietly, and thus of no use to anyone.

The loudspeaker coming under the microscope this month emanates from north of the border. The Canadian loudspeaker industry has benefited enormously in the last few years from having the measurement, testing, and listening facilities of Canada's National Research Council in Ottawa made available to it on a commercial basis. Unlike the US or even the UK, where a new speaker designer has pretty much to rely on his own resources, having to invent his own test procedure as well as design the product, the Canadian equivalent can have his loudspeaker tested under standard conditions, quickly indicating whether he is on the right track or not. (He still, of course, has to rely on his own talent to get on the right track in the first place or to get back on it if it appears that something is amiss.)