Stand Loudspeaker Reviews

The Bose 901 has created more of a stir in audio circles than any other loudspeaker we can think of, with the possible exception of the original Acoustic Research system. Much of the 901's popularity is attributable to Julian Hirsch's rave report in Stereo Review, and there is no doubt but that Amar Bose's compellingly convincing ads had their effect, too. But these things alone could hardly account for the 901's popularity.

Solamente una faccia bella?
At first glance, the Sonus Faber (pronounced Fah-bear) Electa Amator appears to be a typical minimonitor: a small vented box with two drivers. The speaker is significantly better-looking than Franco Serblin's first speaker system, the Snail, a subwoofer with two satellites attached via arms (see photograph in Vol.11 No.3, p.34). And, like the Oracle Delphi turntable or Goldmund Apologue speakers (the latter also an Italian design), the Amator's appearance has received at least as much attention as its performance. But is it just another pretty face?

Let me take you back some 40 years to the mono days of the early 1950s. It's unlikely that the minimonitor genus of loudspeakers, of which this French JMlab is a prime example, would have survived back then. There was the practical problem of available amplifier power. The average amp could squeeze out no more than 10 to 15W into an 8 ohm load—far less power than the typically insensitive minimonitor demands for adequate dynamic headroom. But that in itself would not have sufficed to displace the minimonitor from the marketplace. After all, "high-power" amps (50-watters) could be had at a price.

"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.

Sonus Faber provides a fascinating and challenging insight into the art of high-quality sound reproduction. This Italian company makes two costly two-way stand-mounted speakers that couldn't be more different from each other.

Sonus Faber was founded in 1981 by Franco">http://www.stereophile.com//loudspeakerreviews/870/index2.html">Franco Serblin. Real wood has always featured strongly in the construction of this company's evolving range of costly, compact loudspeaker systems (footnote 1). The first was called the Parva, now in its FM4 form. This was followed by the Minima, a Tablette-sized model. The upmarket Electa came through in the last few years, followed by the Amator-Electa. This series increases in size and weight with each new introduction—for example, the Minima weighed 6kg, the Electa 12kg, the latest Extrema a massive 40kg or 88 lbs.

In recent years, computer modeling, finite-element analysis, and laser interferometry have brought about a huge increase in our knowledge about what makes the moving-coil loudspeaker drive-unit work. Nevertheless, it has remained fundamentally unchanged since it was invented by Rice and Kellogg more than 60 years ago. That doesn't mean that it hasn't been refined considerably; in this review I examine the performance of a design whose drive-unit technology has been taken to the limit of what is currently possible, the B&W Silver Signature.