Description: Three-way stereo loudspeaker system consisting of two electrostatic screens and a single common-bass woofer "commode" (18" cone drive-unit), with a separate line-level crossover/100W amplifier (1968), a separate line-level crossover (1975). Crossover frequency: 100Hz (1968); 70Hz, 2kHz (1975). Nominal impedance: 16 ohms.
Dimensions: Screens, 36" H by 28" W by by 7" D; woofer 24" H x 24" W x 24" D (1968); Screens 60" H by 22" W x 8" D; woofer 19" H x 22" W x 22" D (1975).
Price: $2000, including crossover and bass amplifier (1968); $4000,…
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Sidebar 2: Specifications
EDWARD ELGAR: Enigma Variations, In the South, Coronation March
George Hurst, Bournemouth Symphony Orchestra
Naxos 8.553564 (CD). 1997. Paul Myers, prod.; Dave Harries, eng. DDD. TT: 58:47
Performance ****
Sonics ****
George Hurst, Bournemouth Symphony Orchestra
Naxos 8.553564 (CD). 1997. Paul Myers, prod.; Dave Harries, eng. DDD. TT: 58:47
Performance ****
Sonics ****
In a letter to his parents in 1930, a 17-year-old Benjamin Britten described his attendance at a London concert. The first half of the program consisted of works by Humperdinck, Mozart, and Mahler; but since the second half was to be "all Elgar," Britten and his friend left at intermission. This little anecdote vividly illustrates the clear division that had…
That was the question asked by a reader who was perfectly happy with his CD-based system. He was using the gain control provided by the variable output of his CD player and was apparently in no need of phono playback or greater flexibility. He asked us to answer this question, ignoring for the moment the obvious functions of switching, volume and tone control, and phono preamplification. With those hardly trivial qualifiers—and bearing in mind the high output available from many of today's line sources, CD players in particular—do you really need the added expense and complexity of a…
Thirty-one flavors may work for an ice-cream chain, but a speaker manufacturer who sets out to please every sonic palate ends up with a serious identity crisis, pleasing no-one. From its inception in 1985, Audio Physic, based in Brilon, Germany, has been an event-oriented speaker company. Founder and original chief designer Joachim Gerhard focused much of his attention on providing listeners with the sensation of "live" by emphasizing coherent three-dimensional imaging and soundstaging—though not to the exclusion of timbral accuracy. Except for the Medea, based on a Manger driver (a…
The crossover control's five positions adjust the woofers' low-pass frequency between 250Hz and 300Hz, allowing you to make subtle distinctions between bass that's lean and tight and bass that's somewhat warmer. You can also disable the crossover, if you want to insert an external crossover between the two modules. Also included are: a Phase button, to invert the subwoofer polarity; a Subsonic button, for LP playback, if needed; and three presets, for Small (25m2), Medium (40m2), and Large (>40m2) rooms. With the presets, you can set all parameters "in the ballpark," so you can have a…
Sidebar 1: Specifications
Description: Four-way, floorstanding loudspeaker with powered woofer module. Drive-units: 1" ring-radiator tweeter; 6.5" ceramic-coated aluminum-cone midrange driver; two 6" side-firing, ceramic-coated, aluminum-cone lower-midrange drivers; four 10" long-throw plastic-cone woofers. Frequency range: 10Hz-50kHz. Nominal impedance: 4 ohms. Sensitivity: 91dB/W/m.
Dimensions: 51" H by 14" W by 24" D. Weight: 265 lbs each.
Finishes: Maple veneer; ebony, add $5000/pair.
Serial numbers of units reviewed: 007A/B.
Price: $64,995/pair. Approximate number of…
Sidebar 2: Associated Equipment
Analog sources: Simon Yorke S7, Clearaudio Emotion turntables; Immedia RPM-2, Graham 2.2, ClearAudio Satisfy tonearms; Lyra Titan, Graham Nightingale, Red Rose Rose Petal, Clearaudio Aurum Wood Classic cartridges.
Digital source: Musical Fidelity Tri-Vista SACD player, Alesis Masterlink CD-R recorder.
Preamplification: Musical Fidelity kWP preamplifier, Manley Steelhead phono preamp.
Power amplifiers: Musical Fidelity kW monoblocks, Music Reference RM-200.
Cables: Phono: Hovland Music Groove, Graham IC-70. Interconnect: AudioQuest Cheetah…
Sidebar 3: Measurements
The Kronos offered a little higher sensitivity than the norm, at an estimated 89dB(B)/2.83V/m, though this is 2dB below the specified figure. Note that this is the sensitivity of the midrange-treble head unit, as the woofer section is powered. Similarly, the speaker's impedance graph (fig.1) shows the behavior of the head unit only. The magnitude stays close to 5 ohms throughout the unit's passband. However, the combination of 4.9 ohms and a -46 degree electrical phase angle at 250Hz will cause problems for amplifiers that can't deliver much in the way of current…
As often as not, it ain't the heat—it's the stupidity. When confronted by the smattering of self-referential dilettantes, acrimonious Internut wannabes, and obsessive-compulsive types who suck the air out of our aural fun-house, I find myself overcome with the desire to program my phaser for CLIP.
Snobs and slobs, I calls 'em, O'Boyle. The snobs patronize you with the notion that spending a lot of money is the only way to achieve audio nirvana, and make little effort to hide their contempt for your slobbish blue-collar gear. The slobs, being of a reactionary, pseudo-populist bent, assert…
The Bozak Concert Grand is a loudspeaker dreams are made of. I was just a boy, but I remember to this day the impressive pictures of them in Audio magazine. I thought they must be the best loudspeakers ever made because they were so big—they would let more of the music come out. I suspect the Bozaks beckoned to me in some primal way, just as those giant construction trucks do—the ones that have tires bigger than a man.
My dad owned a beautiful pair of Fisher XP-15s speakers, which sat on either side of the fireplace. He would polish their walnut cabinets until the grain popped…