This is a re-post of my comments on the subject video:\n\nHi Gene, I've seen my fair share of videos on your Audioholics channel but I have to say that this video is loaded with information. You asked Mr. Kumazawa some very useful and pointed questions and his explanations were excellent in my opinion, given the condensed length of the video. Having grown up with vinyl since the early 70s and having read many objective technical reviews (with measurements, of course) from major magazines, my impression is that the GT-5000 definitely stands out among most turntables in today's market, regardless of price. The bulk of today's turntables, including fairly expensive ones, are in many respects stripped down versions of designs from the 80s and are technically inferior; not this turntable!\n\nI wanted to address some of the points mentioned. Sorry for appearing preachy and being long-winded. Take it for what it's worth.\n\n1) The Straight Tonearm Design\nMr. Kumazawa hit the nail on the head. All else being equal, straight tonearms can trace grooves more accurately. The laws of geometry dictate that curved arms add mass and instability. Lower mass increases the ability to track and a straight tonearm increases rigidity to reduce resonances. This has been proven in a laboratory study performed back in the early 80s on tonearm mass. It was determined that the lower effective mass arms (more on this below) could track better, especially when dealing with warped records.\n\n2) High Density Base (or Plinth)\nBy employing high-density fiberboard, the base is using what is known as "mass loading" to absorb and dissipate extraneous vibrations in the form of acoustic feedback (vibrations from outside vibrations like footfalls and loud music from speakers)\n\n3) 3-axis Vibration Controlling Feet\nThe 3-axis vibration control from the feet may contain springs, according to my understanding of Mr. Kumazawa's explanation. If this is true, the turntable is also employing spring suspension to also accomplish the same objective as #2. Traditionally, turntable designers have opted for #2 or #3 but not both. This is unusual but can be extremely effective.\n\nWhen using spring suspension manufacturers must decide on the compliance of the suspension system. Higher compliance (2Hz to 5Hz) can filter out more acoustic feedback (vibrations from footfalls and vibrations from loud speakers) and even motor rumble but tend to make the upper platform holding the platter and tonearm jar from physical handling because the platform rests on top of the springs. SOTA avoided this tendency by hanging the platform on springs. The Yamaha GT-5000 apparently used yet another option using its feet. Lower compliance (above 5Hz) would filter out less vibration but it would be easier for physical handling.\n\n4) Moving Coil (MC) vs. Moving Magnet (MM)\nMC cartridges are revered by the majority of vinyl audiophiles. Mr. Kumazawa references one of the reasons but doesn't get into the nitty gritty: the response. MC cartridges have extended high end response that typically reach anywhere from 30kHz to all the up to 80kHz. While there's very little musical signal in this area, it may be comforting to known that well-pressed LPs can contain all the extended highs in this range if it is also on the master tape. MC cartridges also tend to excel at transient response. You'll notice this on music with a lot of percussion. The starting and stopping of transient sounds are usually razor sharp and lends a sense of realism.\n\nThe transient response can be measured when playing a test LP containing a 1Khz square wave test tone and observing the reproduction on a scope. Rise time can be as low as under 10µs, indicating the ability to reproduce the leading edge of transients in a very fast way for razor sharp attack time.\n\nThere are a couple of disadvantages: The cutting stylus used on the original lacquer or copper (in the case of DMM - Direct Metal Mastered) discs have extraneous vibrations in the neighborhood of 37kHz to 42kHz. If the MC cartridge reproduces this resonance, it may modulate with the actual musical signal. This can lead to a sense of "airiness" and "openess" in the high treble. It can sound pleasant, though. The other issue is that the vast majority of MC cartridges have a peaked high-treble between 10kHz - 20kHz amounting to several dB. This can also lead to the same false sense of "airiness" or "openess" in highs.\n\n5) Belt-Drive System\nObjectively, all else being equal belt-drive hasn't been proven to be superior to direct-drive. The most hardcore technical reviewers have performed measurements and listening evaluations and have not been able to draw any clear conclusions. The surprising point is that audiophiles have traditionally chosen belt-drive while Japanese manufacturers have introduced direct-drive back in the early 70s. So the GT-5000 is unusual in this respect.\n\nThe motor design hasn't been mentioned in the video but the specs on Yamaha's website reveal that it is a very high-quality and costly design. The AC synchronous motor uses the 60Hz line frequency as a speed reference (for speed regulation) while the number of poles for the motor contributes to more consistent rotational speed. Lower-priced motors employ as little as 4-poles. 24 poles is extremely good but....costly! In any case, it contributes to lower wow and flutter and mitigates any motor cogging (unwanted step-like movement typical of lower cost motors).\n\n6) Warped Phil Collins LP And Vibrating Woofer\nWoofer vibration as a response to playing a warped record is a direct result of less-than-ideal cartridge\/tonearm resonance (a mismatch of cartridge compliance and effective tonearm mass). It was caused by the interaction of a cartridge with higher-than-desirable compliance, given the effective mass of the tonearm. A lot has been written about this issue throughout the 80s but only hardcore vinyl audiophiles from yesteryear would be aware of this. Every stylus has a suspension system. The vast majority of MC cartridges have lower compliance (stiffer suspension) than their MM counterparts. If the effective mass (measured mass at the point of the stylus tip) is high, then a cartridge's compliance needs to be sufficiently low. There is a range of frequencies that the cartridge\/tonearm inevitably overreact to when playing LPs. Preferably, the amplitude of the resonance is 10dB or less within the optimum range of 8Hz to 12 Hz. Warps tend to reside in the 5Hz to 6Hz range and this is where the excessive and lower-than-desirably placed cartridge\/tonearm resonance resulted in the inaudibly vibrating woofers. This results in wasted amplifier power as well as possible modulation with the bass in the music. If the warp is bad enough, it can even cause extra flutter caused by a back-and-forth scrubbing action of the changing VTA (vertical tracking angle) of the stylus as the effective mass of the cartridge\/tonearm dynamically change when the stylus travels through peaks and troughs of record warps. It can be directly addressed by fixing the issue at the source (using a less compliant cartridge), using a turntable that uses a vacuum hold-down system to flatten the record as it is being played or inserting an infrasonic filter in between your phono preamp and amplifier (indirect approach).\n\nThere is no standardized method of measuring either cartridge compliance or a tonearm's effective mass. In any case, the former would be considered low if it is rated at 10 to 15 dynes\/cm. 30 or higher would be high. Audio-Technica provides two numbers. One for dynamic compliance and one for static. The tonearm's effective mass (the measured mass at the stylus tip) would be considered low if it was 10grams or lower, medium at around 12 to 14 grams and high above that.\n\nUnfortunately, most manufacturers currently don't provide these two specs but you can get a sense of the resulting combination's resonance by using the attachment. It should work reasonably well.\n\nOtherwise, you can get a rough and indirect idea of a cartridges compliance through its recommended tracking force. High compliance cartridges track at under 1 to about 1.5 grams, medium compliance models track at 1.5 to 1.75grams, and low compliance models track at higher weights.\n\n7) Well-Produced Imaging\nMuch of this can be attributed to a well-centered recorded and\/or a sufficiently long tonearm. When spindle holes are off-centered (there are a lot of them!) the direct result is eccentric wow (slow variations in pitch). This can be mitigated somewhat by a tonearm that is long. The GT-5000's tonearm is 9 inches which is average length. Longer tonearms describe a shallower arc so they will produce lower eccentric wow and the left\/right grooves will be played more in synchronization for more stable imaging. Of course, the longer the tonearm, the higher the effective mass. There's no such thing as a free lunch. Only two turntables ever made have mitigated this issue: the Nakamichi TX-1000 (1982) and Dragon CT (1985). Both were direct-drive designs that employed a double-platter and both re-centered the top platter to eliminate the eccentric wow. Both were also extremely expensive. The poor man's alternative is to use a turntable with a removable spindle to allow the user to re-center records manually. Many old record changers of the 70s and 80s have removable spindles.