Hybrid chassis with multi-material makeup suppresses unwanted vibrations

The chassis has a multilayer structure combining a heavy 36mm MDF baseplate with high internal loss and a 12mm synthetic marble with outstanding rigidity. (The weight of the cabinet is 8.8kg.) Great feedback resistance has been realised with this excellent rigidity and vibration suppression. The tone arm and platter are mounted on the synthetic marble top plate while the motor, which causes vibration, is mounted to the MDF base plate. These separate structures using these materials as dampers isolate the tone arm and motor from each other. An overall structure with outstanding stillness has been realised that reduces the transmission of vibrations from the motor to the tone arm.

Based on their experience using Japanese washi paper turntable sheets and after repeated listening tests; they determined that the appropriate thickness, washi paper is the best material to use as a washer between the synthetic marble and the MDF for achieving optimal sound balance. By using washi rather than rubber or metal, the original vitality of the sound can be drawn out when records are played back.

PRS3 belt drive structure supports accurate and stable platter rotation

Ideally, once started, platter rotation would continue by its own weight and inertia, but this is impossible, of course. The TN-5BB uses the belt drive method with a flat belt that transmits the power of the DC motor to the outer circumference of the platter. An optical sensor in the bottom of the platter detects the platter rotation speed, and an automatic rotation adjustment mechanism applies a servo to the motor in response. This Platter Rotation Sensing Servo System (PRS3) realises high rotation precision that would be difficult to achieve with just inertia and a motor. Supporting three speeds, 33-⅓, 45 and 78 rpm, this turntable can play back old records as well as 78rpm records with high audio quality.

20mm thick acrylic platter

Acrylic with excellent levelness and internal loss is used for the platter. The 20mm-thick acrylic has 1.7kg weight and realises high inertial momentum. The polyvinyl material used in records easily takes on negative electrical charges. Acrylic has this same property, but these materials are relatively close in triboelectric series*. This provides the advantage of making electrification difficult even if they directly rub against each other. Records can be placed directly on the platter without using a turntable sheet, allowing enjoyment of their clear sound.

*A triboelectric series is a list of materials ordered according to the ease that they develop positive and negative charges. Materials that are close in a triboelectric series do not easily develop electric charges even when directly rubbing together. In contrast, they develop charges more easily the farther they are from each other.

Reliable tracking realised with knife-edge tone arm that is an SAEC x TEAC collaboration

This knife-edge tone arm was created in collaboration with SAEC, a Japanese brand with 40 years of tonearm design experience. Using a stainless-steel knife-edge bearing for the vertical movable part, Teac have realised record groove tracking that is highly sensitive and reliable. Furthermore, for the lateral movable part, a conventional structure that has a ball bearing at one point for support has been replaced with a structure that uses Japanese-made high-precision ball bearings at two points for support. The height of the tone arm base can be adjusted. The Vertical Tracking Angle (VTA) can be adjusted in a 6mm range and optimised for cartridges of various heights. The tone arm geometry adheres to the Baerwald alignment recommended by the IEC.

Automatic arm lifting when playback ends

Using a powered arm lifter enables raising and lowering the arm with a single button and also employs a function that automatically lifts the arm by a contact-less optical sensor after playback ends. The automatic arm lifting function can be canceled when playing records that do not conform to standards.

Arm lead wire uses PC-Triple C material made by SAEC

Lead wire that uses PC-Triple C conductor made by SAEC is employed for the wiring inside the tone arm. With outstanding conductive performance, this conductor transmits even weak signals from analogue records.

PC-Triple C

PC-Triple C realises outstanding conductor performance using unique continuous forge extrusion technologies developed by FCM Co., Ltd. (an affiliate of Furukawa Electric Co., Ltd.). Crystal grain boundaries that obstruct signal transmission are reduced as much as possible, and crystals are linked in the lengthwise direction.