A 70mm solid aluminium chassis forms the base of the turntable, on which up to three arm attachments can be fitted for either 9″ or 12″ tone-arms of any make.
The 50mm thick platter is driven by its remotely sited motor and AlphaDIG electronic control offers a perfect supply to the motor. The turntable base has been designed for optimum stability; the large footprint of the table generates more stability, to increase the weight concentration at the base of the turntable.
The Thunder is engineered to provide exceptional sound, but its form is also attractively contemporary.
More ways to amaze. The new Thunder is a consequent developed new design. It’s all combined with the award-winning performance, elegance, convenience and comfort that have made the mass turntable Series so successful. Get ready to experience of the Thunder Series – now perfectly suited to your own unique style. Perfect surface quality combined with the latest technology and flexibility.
The Thunder includes the 24 Silencer Platter and the latest version of the AlphaDig motor electronic elegantly placed beside the Chassis. The tone arm mounting plates are adjustable. The mounting of any desired tone arm is possible, with a maximum of 3 tone arm mounting plates on one turntable. Three adjustable feet for simple macro and micro adjustments to level the turntable.
The drive System
At the new Thunder we combine a massive Aluminium plinth of 45mm with a 50mm massive Aluminum platter. This is a perfect fit for the Tidorfolon bearing holding the platter and the exchangeable arm boards.
A new fully digital motor Electronic Alpha DIG provides perfect speed stability and easy operation is integrated into a fully CNC milled external housing.
The carefully made Aluminum platter with his 24 Silencers is another part which makes the sound of a Thunder so outstanding for his price class.
A 50mm solid turntable platter made of aluminium with 24 Silencer inserts. The platter is made of a very soft alloy to optimize its periodic resonance, and is coated on the rear side with resonance-reducing material. For the Silencer- Platter the development target was clearly defined: Elimination of vibration due to impacting airborne sound. Elimination of bearing noise, increase of the gyrating mass. Serious elimination of all frequencies, especially in the range 400-6000Hz. This was achieved by drilling 24 holes into the turntable. The manufacturing process for the precision of these holes was once more refined. The holes are drilled and afterwards separately “line-bored”.
This allows a clearance of less than 1/100mm. Perfect conditions for the force-fitting of the 24 silencer modules. The “silencers” are now an integral part of the turntable – but highly absorbing. Existing vibration energy is quickly reduced and the Platter is immediately steadied. To avoid unbalances through the additional holes these are manufactured in the same setting as the outer contour.
In this way the holes are absolutely true to the centre of the turntable. As you can see, we have done everything to develop a potentially perfect product.
We at Acoustic Signature believe that a motor system for a turntable should have enough energy to speed up the platter but not influence him during rotation. We reach that aim by using a European made Synchronous motor with our own State of the Art motor control. The external drive motor of the turntable is run by its own electronic controller, called the AlphaDIG. It is a brand new design where fully digital output stages and quartz locked technology is used. It is impervious to the negative effects of mains voltage fluctuations and household appliances that produce ‘noisy’ mains that can have a very great detrimental effect on AC motors and therefore the turntable performance and ultimately the sound.
And a quartz precision DSP then produces a perfect sine wave at 24VAC to run the motor, resulting in a perfectly steady and constant platter rotation. The AlphaDIG control is the perfect design solution. This engine system is absolute stable in his rotation speed and in combination with the digital control easy to use and reliable. The motor of the Thunder is on the left back side of the turntable close to the Chassis. As he has no contact with the Chassis there can´t be any vibration transferred to the turntable. The Thunder can be equipped with up to 3 motors.
The bearing is the heart of every turntable. Through fundamental research and development, we have invented a bearing with the ideal performance characteristics of exact fit, extremely low noise, very low friction and long term stability. The platter bearing component is manufactured from special hardened and polished steel, with an extremely hard tungsten carbide ball at its base. The bearing housing uses perfectly matched and ‘aged’ sinter bronze inserts which are self-lubricating; and therefore maintenance free.
At the base of the bearing, we use our specially developed ‘high-tech’ material TIDORFOLON. Our bearing runs dry – without oil. Here we have ultra-tight tolerances and our Tidorfolon bearing is lifetime maintenance free. We trust in this Bearing so it´s covered with a 10 year product warranty.