Today Steve and I attended Marc Gomez’s demonstration of his brand new SAT XD1 turntable. The event was hosted by Maier Shadi, proprietor of The Audio Salon in Santa Monica, California. Michael Fremer, Editor of AnalogPlanet, expertly and entertainingly performed DJ duties.
The XD1, as Marc explained, is as small as possible but no smaller. The concept here was to allow the engineering and design and functionality to drive the form and the aesthetics. The sides of the base of the turntable are rounded and machined to diffract acoustic vibration from the speakers of the system in which the turntable is employed.
Marc explained how he does not believe in the concept of “voicing” audio components to sound a certain way. Rather, as an engineer, Marc’s philosophy is to imagine, design and build the best product he can make with the best quality materials from an engineering perspective, focusing on maximizing performance, and the resulting product will inevitably sound great.
This direct drive turntable is obviously extremely well-machined with great precision. While Marc uses a motor manufactured by Technics, he machines his own motor support structure which is literally about 10 times the weight of the standard motor base. (Marc passed around the original Technics base and his custom base for comparison.) Marc uses the magnets and windings and the electronic controller of the Technics motor, but modifies other aspects of the motor for his custom use.
The base for the platter and the motor is supported by three large pods which have a viscoelastic dampening layer.
The entire turntable base is machined from a single billet of magnesium alloy. Similarly the case for the motor controller is machined from a billet of magnesium alloy.
The entire turntable sits on a Minus K negative stiffness vibration isolation platform, which is custom-made by Minus K to Marc’s specifications for the XD1. Like the turntable base and the motor controller case the box for the Minus K platform is machined from a solid rectangular slab of metal.
During the demonstration I asked Marc: “While I appreciate that the Minus K platform is made to your specifications for your turntable, given that this is a state-of-the-art and cost no object design why didn’t you make an isolation platform which is integrated with the turntable itself rather than being separated from the turntable by the intermediary footer pods?”
Marc replied that he wanted a passive, and not an active, vibration isolation solution, and that of all of the available technologies the Minus K provides exactly the vibration isolation functionality he wanted. With regard to why the turntable has feet which sit on a separate platform he said that he specifically wanted an intermediate vibration dampening function performed by the visco-elastic component of the pods which attenuates vibration at higher frequencies than does the Minus K platform.
Interestingly, Marc said that he is planning to design a vacuum hold-down system which will be a standard part of the XD1.
Marc mentioned that he will be offering a specialized and dedicated version of his tonearm specifically for the XD1, and that this specialized version will not be available separately from the turntable. Among other special titanium parts, this specialized tonearm will have a titanium tube inside the carbon fiber arm-wand.
As with the system I heard a few weeks ago at The Audio Salon the phono stage and the line stage and the power amplifiers are all solid-state components made by Dan D’Agostino. The sound from the system today fronted by a Lyra Atlas SL cartridge on the new version of the SAT tonearm, the CF1, on the XD1 turntable was very clean, very transparent, high in resolution and dynamics, and very detailed. This analog front-end is a very “transparent to source” type of sound.
I feel strongly that anybody who enjoys the sonic attributes of the SAT tonearm will be very excited by the sonic attributes of the XD1 turntable. I assume that many of Marc’s tonearm customers will want to buy the turntable as well, getting the specialized titanium tubed tonearm for the turntable in the process.
Thanks to Marc for a very interesting demonstration and technical explanation! Thanks to Maier for hosting the event (and for inviting me), and thanks to Michael for telling interesting background stories spinning vinyl!