Dr. Feickert Analogue Firebird turntable
A complete redesign of the inverted platter bearing used in the Firebird and in Feickert's two other turntables, the Woodpecker and Blackbird, is claimed to reduce the contact area between spindle and bearing well by 80%, in order to reduce friction and, in turn, rumble, wow, and flutter. (Good thing: The original Blackbird, which I reviewed in my September 2011 column, wasn't the quietest bird on the block.) Riding on the inverted bearing is a 13.23-lb platter of polyoxymethylene (POM), which is said to have resonance characteristics similar to those of vinyl itself; embedded within that platter, close to its outer edge, are eight solid brass cylinders. Feickert says that his three-motor arrangement, in which the platter is evenly driven by a thick, precision-ground belt made of nitrile butadiene rubber (NBR), results in a more stable bearing and platter by canceling out "virtually all acting forces," to effectively eliminate bearing and platter wobble.
The Firebird weighs 68.5 lbs, and its plinth is large: 22" wide by 6.25" high by 18.25" deep. Its thin upper and lower aluminum-alloy plates sandwich a block of treated MDF, and it sits on (newly designed) adjustable feet. The plinth is available in natural or black-anodized alloy, with side panels of zebrawood or piano-black lacquer.
Feickert's arm-mounting system makes installing, adjusting, and swapping out tonearms more convenient than on many turntables. In each rear corner of the plinth is a large, oval, diagonally oriented cutout; the one on the right can accommodate arms with effective lengths of from 9" to 14", the one on the left arms of 9" to 12". Each cutout can be fitted with a circular armboard that bolts to a pair of sliding, captured nuts, one nut on each side of each cutout. A notch in the rim of the armboard aligns with a scale calibrated in millimeters and silkscreened on the plinth, for measuring the distance from the tonearm's pivot to the center of the platter's spindleobviating, in most cases, any need for a pivot-to-spindle protractor. This makes swapping tonearms easy, assuming you've already mounted your other arms on Firebird armboards and that their pivots coincide with the centers of those armboards. Otherwise, as with tonearms that have off-center pivotseg, the Kuzma 4Point, the Tri-Planar, and the Reed 3Pyou'll need to use a protractor capable of measuring pivot-to-spindle distance. Dr. Feickert Analogue, among others, makes such a protractor.
A single armboard is included in the Firebird's price; to make use of the turntable's second arm cutout, the user must add to it a Delrin "slider" ($100) and purchase an additional armboard ($125 each). The Firebird's platter bearing is warranted for five years, everything else for two years.
Relatively Easy Setup
I placed the Firebird's 68.5-lb plinth atop a Harmonic Resolution Systems isolation base, made sure that both base and plinth were level, then attached to the plinth's underside the L-shaped mini-plug for the power supply. After applying to the bearing spindle a decent amount of the supplied lubricant, I carefully lowered the platter into place and waited for it to fully seat itself. That wait over, on went the belt. The only sticking point was getting the armboard bolts into those sliding metal nuts. It wasn't easy, but only those who like to swap arms in and out will have to bother with it.
The Firebird can spin at 331/3, 45, and 78rpm; plus and minus buttons permit easy speed adjustment, if needed. The speed controller comes precalibrated, but I nonetheless checked it with Dr. Feickert Analogue's PlatterSpeed software and 7" test record. All three speeds were spot on, and remained so throughout my listening. See figs.1 and 2 to check out the measured results at 331/3rpm: They're very good, and unusually symmetrical (perhaps because of the equilateral three-motor drive system?), though the low-pass-filtered trace (fig.2, wavy green line) seems to indicate the constant correcting action of the controller. Still, the filtered results look good, if not the best I've measured.
Nine InchesMore than Long Enough for Me!
Despite their popularity in some circles, I've never been a big fan of 12"or longertonearms. (What were you thinking?) I've long believed that whatever benefits are gained with longer arms' lower theoretical tracking error and need for less anti-skating force are more than offset by their lower rigidity, their amplification of any errors made in setting overhang or zenith angle, and, especially, problems resulting from the arm's greater moment of inertiaie, a tonearm's ability to handle a record groove under dynamic conditions.
This has also been the conclusion of the designers of Continuum Audio Labs' 9" Cobra tonearm ($12,000) and, more recently, of Marc Gomez, who designed the Swedish Analog Technologies arm ($29,000). In fact, the SAT arm is actually somewhat shorter than Rega Research's own tonearmlong a de facto standardall models of which have an effective length of 239mm (9.321"). Gomez, who has a master's degree in mechanical engineering and materials sciences, says that whatever tracking-error distortion a shorter arm introduces is more than offset by its greatly superior performance under dynamic conditions. Listening to his SAT arm sufficiently convinced me of that that I plunked down, without regret, five figures' worth of retirement income. Of course, more than its length is involved in the sound of the SAT arm. (That said, I also own and love the 11" Kuzma 4Point.)