Celestion 3 loudspeaker
End of discussion.
Having spent time in recent issues with relatively expensive speakers, ranging from the $1195/pair Vandersteen 2Ci to the $4000/pair Pioneer TZ-9, with stops along the way at the $1999/pair Celestion SL600Si and the $2500/pair MartinLogan Sequel II, I thought it appropriate that I should return to my Cheapskate roots by looking at a small, insensitive, sealed-box design featuring limited low-frequency extension that, while epitomizing the adjective "cheap," does have a high-end pedigree.
Celestion 3: $250/pair
With the exception of Infinity's Infinitesimal from the early 1980s, the short-lived AR-1M, and Koss's various permutations on their "Dyna-Mite" design (footnote 1), it seems a peculiar European obsession to try to make tiny loudspeakers capable of genuine hi-fi performance. England, in particular, has led the world in these Lilliputian endeavors, with first the venerable LS3/5a redefining what a speaker should produce in terms of imaging accuracy, then the Linn Kan showing that this performance needn't be at the expense of dynamics and musical feel. The various generations of the Wharfedale Diamond showed that small and cheap didn't necessarily mean "unmusical." Then, at the 1989 Las Vegas CES, Celestion raised the stakes by introducing a speaker intended to sell for just $250/pair that nevertheless featured a metal-dome tweeter!
The Celestion 3 uses a 1" titanium-dome HF unit with a narrow surround to cover the two audio octaves from 5kHz on up. This is constructed on a rectangular plastic plate that bolts to the baffle, with three narrow, horizontal strips providing a degree of protection. Covering what in effect is the remaining 61/3 octaves is a conventional-looking paper-cone unit, again constructed on a rectangular plastic plate. A large half-roll surround suggests some serious excursion capability; bass alignment is sealed-box.
The crossover consists of four elementsa ferrite-cored inductor in series with the woofer to roll out the highs, and a second-order shunt air-cored coil/series capacitor network in the tweeter feed, with a series resistor used to lower the HF unit's sensitivityall glued to the rear of the plastic terminal plate. On one of the review pair, the woofer inductor had broken free of its glue patch and was hanging suspended by its lead-out wiresnot a recipe for long-term reliability. The terminal posts themselves are of reasonable quality for such an inexpensive design, with a hex profile and enough room around them to fit stiff cables. (The internal wiring, however, is all small-gauge.) As is usual with British speakers, the posts are spaced too far apart to take dual banana plugs.
The enclosure is constructed from ½" fiberboard, loosely filled with acrylic fiber, with the sides, top, and bottom wrapped in a walnut-grain vinyl material. Some attention needs to be paid by Celestion to the 3's packaging. Rather than expanded polyurethane foam, the speakers are protected by thin cardboard corner pieces, which is perhaps expecting a bit much, one of the review pair having suffered cosmetic damage to two of its rear corners. The structural integrity of the enclosure was not compromised, however. The grille is a polystyrene space frame covered with black fabric that plugs into slots at the top and bottom of the front baffle.
All things consideredfor example, at a retail price of $125 each, the resources available to the designer will be minimalthe standard of construction is reasonable.
With the speakers out in the room on the 24" stands in the same positions where the Spica TC-50s had sounded reasonably rich, the sound of the 3s was unmusically thinit was hard to believe that there was any bass reproduction at all. The 3 is definitely a loudspeaker needing all the help it can get in the lows, and I ended up with them 3" away from the rear wall. (This is also a big plus point, in my opinion, as those restricted to a loudspeaker budget of $250/pair will undoubtedly have small rooms where a pair of speakers out in the room will represent an imposition.) In their terse but comprehensive manual, Celestion recommends a minimum spacing of 2", but warns against placing the speakers too close to the side walls, 24" being the absolute minimum. Having settled on optimum siting and then broken the speakers in for a day with the appropriate Kraftwerk albuman album recorded by machines, it seems only fitting that I not be in the room when it was playingI sat down to some intensive listening.
Well, the 3 is still a small loudspeaker, there still being no low bass to speak of. However, the rear-wall placement does usefully bring up the upper basselectric bass and double bass now both purring appropriatelyat the expense of adding a slight chestiness to male speaking voice. Low-frequency definition was still quite good, however, with bass instruments sounding quite "fast."
The exact listening axis and degree of toe-in proved quite critical. Sitting so that you can see the cabinet top, the midrange sounds too hollow. With the listener directly on the tweeter axis, the presence region becomes a little too lively, but when the speakers were facing straight ahead, the extreme HF sounds a little depressed, imaging specificity suffers, and a hardness in the lower treble is accentuated. Ultimately, I found the sound to be best integrated across the upper midrange and treble when the speakers were toed-in a little, but not all the way to the listening position.
Taken overall, the sound was quite musical, with a smooth, sweet upper treble that made violins sound reasonably natural for such a low-priced speaker. Image depth and lateral precision were compromised to an extent by the close rear-wall placement, but the sound still had an attractive "open" quality with a good sense of "air" and space. I must say that, as much as I thought the Wharfedale Diamond III was a good performer at the price (see Vol.12 No.2, p.122), it is outclassed by this Celestion in the quality and quantity of its treble. Dynamics were good, provided the music didn't feature high levels of low bassthe organ-pedal introduction to Also Sprach Zarathustra lent the orchestral sound rather a stifled qualityand drums came over with good impact, playing reasonably loud without too much of a sense of strain.
Coloration levels were higher than is usual with speakers costing two to three times the price of the Celestion 3, but were actually good at this price, being less obtrusive than the Diamond's. The midrange had a similar character to the Spicas, though to a considerably more noticeable degree, in that it sounded "cardboardy." This endowed cellos, tom-toms, and male voice, for example, with a rather "woody" signature but lent the overall balance more of an "aww" quality compared with the twice-the-price Spicas. There was a refreshing freedom from any sibilance emphasis, though some voices, particularly when closely miked, took on an added grittiness. Perhaps of more importance was a liveliness above the top of the treble staff, in the 8001300Hz region, which threw some piano notes forward from the image (though not to anything like the extent that occurs with speakers like the Spectrum 208B), added a hard, rather confused quality to the sounds of treble instruments like the oboe, and made naturally recorded trumpet sound too squeaky.
Should Stereophile's readers be considering a speaker as inexpensive as the Celestion 3? It depends on their individual needs. A pair of good stands will add at least $100 to the price, which starts to put the 3s' price nearer that of such floor-standing bargains as the $495/pair Magnepan SMGas. The little Maggies will go louder than the 3s, with lower levels of midband coloration. However, they do need considerably more room to breathe than the Celestions, and can't be placed near a rear wall. For someone on a restricted budget, with a small listening room, therefore, a pair of 3s on good stands will mate well with inexpensive electronics (provided that these don't have too dry or bright a treble) to produce what, while not scaling high-end heights, will almost always be a musical sound, without significant failings.
Footnote 1: I don't consider the Bose Roommate to have hi-fi pretensions.