Design focus included the following :
1) Elimination of all unnecessary vibration and resonance
2) Absolute rotational accuracy and concentricity
3) Maximum quietness
4) Immunity from external vibration
5) Mounting flexibility for all types of tonearm
6) User friendliness and an elegant beauty
7) A choice of platter material and type
8) Silent, ripple free air pumps
The result is an amazing level of signal to noise ratio and speed stability that used to be impossible in conventional turntables.
We are proud to introduce to you the ulitmate anlaogue playback turtnable from Japan. Analog vinyl records or discs are still the primary source used by many high-end audiophiles and music lovers around the World. To meet their needs, TechDAS has brought past know-how, the latest electronics and machining technology, and an understanding of materials science together to develop the best possible turntable for musicality and sound quality, the Air Force One has landed
Platter the core feature of the The Air Force ONE is the uniquely designed platter. It consists of an air-bearing main platter and an upper sub-platter with(optional) vacuum hold-down.
Main Platter: ¨The Main Platter of The Air Force ONE is fabricated of 19kg of non-magnetic SUS316L stainless steel. The material is first forge processed (heat treated) to increase hardness and then machine-cut in a low-speed high-precision lathe to ensure a top surface with zero magnetism. The bottom surface is then mirror polished in order to ensure perfectly smooth air stream for the large air-floatation bearing. The Main Platter of The Air Force ONE also incorporates an internal air-chamber of 1.1 liters. As part of the vacuum hold-down system, this large cubic volume of air brings about a characteristic damping effect that prevents resonance forming between the upper sub-platter and the main platter ensuring amazing quietness.
Upper-platter: ¨The main platter of The Air Force ONE is topped with an interchangeable upper sub-platter in a choice of materials. In addition to the choice of materials, two different types of upper platter can be chosen " with vacuum hold-down or non-vacuum hold-down" resulting in a total of six options with the choice of platter below. :
A7075 : Aircraft-grade extra super duralumin
SUS316L : Non-magnetic hard processed stainless steel
Acrylic resin : Black methacrylate
One upper platter of the buyer's choice is supplied with the standard order. Additional upper-platters can be ordered at the time of purchase or as optional upgrades.
¨Vacuum hold-down¨The vacuum hold-down function is especially effective for the playback of warped discs. It is controlled by a "SUCTION" toggle button on the electronic control panel. Switching it to OFF momentarily reverses the air-flow to lift the disc, making removal easier. The vacuum feature minimizes resonance of the disc against the upper platter, and low-frequency oscillations caused by warped discs. An extremely thin anti-static mat is also supplied. This can be placed between the platter and disc on the vacuum hold-down models to eliminate static electricity.The special material of the mat helps in part to deliver a richer musical experience.
Suspension The Air Force ONE sits on three height-adjustable feet with a hybrid air+liquid polymer suspension system. Air and a gel-type aqueous polymerare sealed in the bladder of the suspension, allowing user adjustment ofthe resonant frequency of the suspension system to minimize unwantedvibration.
Drive Belt A custom-made non-stretchable 4mm thin flat belt is used. Uneven rotation (wow and flutter) caused by belt oscillation used to be unavoidable in conventional rubber belt drive turntables. The surface-polished polyurethane/fiber flat belt adopted by TechDAS eliminates the rubber “bounce” and this results in more stable rotation accuracy and yet allows the 30Kg platter to start-up easily and to quickly reach to rotational stability. A belt tensioner is incorporated in the motor unit for precise adjustment
Motor Drive Unit ¨The motor unit is separate from the main chassis. In order to have the necessary stability to drive the heavy platter, A huge AC synchronous motor driven by a speed adjustable amplifier is installed in the motor chassis. Rotation speed is detected by a sensor on the bottom of the main platter and speed errors are automatically eliminated. With a platter as heavy as maximum 30Kg, maximum torque is generated until the platter reaches a steady speed and the speed locked. The driving voltage of the motor is then automatically decreased to eliminate motor-induced drive oscillation. With the almost frictionless air-bearing, stable rotation can be achieved using the moment of inertia of the massive platter. The role of driving motor after initial start-up is just to maintain a steady speed and hence only minimum torque is required. This realizes amazing quietness and still maintains absolute speed accuracy.¨The rotation speed is shown on a digital display on the control panel.The system allows the user to accurately adjust speed in +/- 0.1 rpmsteps, which means that you can listen to music in the pitch you choose.
