Turntable PS 2
Directly driven record player with active radial pick-up arm and moving coil system
The PS 2 is the first record player, whose radial pick-up arm has been combined with a processor-controlled linear guidance. This new concept allows a perfectly straight pick-up arm without skating force or tracking angle error. A further innovative feature provides for turntable drive control when changing records: briefly placing a hand on it suffices to bring the massive aluminium turntable to a standstill. A brief tap will set it rotating again. Alongside the intuitive operation of the pick-up arm and the arrangement of the function keys, this ensures the exemplary handling of the PS 2. Furthermore, all the pluggable connections are arranged on the underside of the unit: the record player – together with other components of this design line – thus blends into sophisticated room concepts.
The PS 2 contains two microprocessors that operate independently: a chip constantly compares the turntable speed with the specified setting and regulates with exact quartz-crystal precision the power at the motor commutation amplifiers. This takes place in an absolutely linear fashion and without perceptible control behaviour. Furthermore, the motor possesses a very high maximum torque, which has a positive effect in the run-up phase: if the set rotation speed of the 4.7 kg heavy aluminium plate is reached after 4 seconds, then the smooth running bearing ensures that the motor only regulates the power by +/- 2.6 % of its rated power. This enables the drive to provide extremely consistent sound characteristics, untypical of direct drives. The second processor controls the position of the pick-up arm base. In this regard, the chip does not require any lateral force, but instead draws on the pick-up arm geometry as the control variable by using state-of-the-art non-contact sensor technology that exerts no force. The pick-up arm-base tracking is highly sensitive and takes place in real-time. A silent, finely balanced and multi-decoupled precision drive assumes the mechanical work. The activation and shutdown of this drive is fully automatically controlled. This allows the pick-up arm to be operated as a normal pivoted tone arm. Although the scanning angle of the pick-up arm can theoretically be set to a precise 0.00°, the skating force is far more important: this the main cause of the majority of signal distortions. With the PS 2, this is so low as to have no effect on the signal and does need to be compensated.
|A Ballfinger design principle is the possibility to place the device wherever desired in the room with no visible cables or connections. This is why the mains connection and signal output are located on the underside of the PS 2.
The corpus consists of a massive, 60 mm thick MDF. The following surfaces are available, and they can be combined with each other:
|For modification to other audio pick-up systems, the height of the turntable platter is adjustable. The PS2 is supplied without platter top as standard. The record clamp is included in the scope of delivery. The massive aluminium feet are connected to the chassis using absorber elements. They enable the precise levelling of the record player on the installation surface.
You can choose between RCA and XLR connections for the signal outputs. The PS 2 shown here is provided with an XLR connection for balanced signal transmission. The balanced signal transmission of audio signals has its origin in professional applications: here the signal is transmitted between the devices without ground connection. This makes interference coupling in the audio signal impossible.
|Speed||33 1/3 and 45 rpm|
|Motor||Direct drive with analog sine commutation with rotor position detection. Ironless BLDC motor with quartz-precise speed control via speed sensor, magnetically shielded|
|Bearings||Bronze bush in oil, axial bearing relieved by neodymium magnets|
|Platter||Alluminum precision turned and balanced, 22 mm thickness. Height adjustable by 2,3 mm, weight: 4,6 Kg with clamp|
|Chassis||60 mm medium density fiberboard (MDF) veneered with aluminum housing|
|Deviation of rated speed||0,001%|
|Gleichlaufschwankungen||± 0.03 %|
|Signal to Noise Ratio||DIN IEC 98 by method A / 85 dB|
|Run-up time||4.0 seconds at 33 ⅓ RPM, 6 seconds at 45 RPM|
|Max. Power consumption: 25 watts (startup phase)
In operation: 8.6 watts
Standby: 0.5 watts
|Power supply||120V/240V 50/60Hz AC via 3-pin angle plug, protection class 1|
|Dimensions D x W x H||380 mm x 46 mm x 145 mm|
|Principle of operation||Gimbal-mounted aluminum tone arm on precision linear guide, processor-controlled|
|Bearing||Precision ball bearings|
|Effective length||223 mm|
|Dynamic mass||12 g|
|Total weight (only arm)||233 g|
|Resonant frequency||9.5 Hz|
|Connections||Balanced via XLR for connection to transformer, optional RCA|
|Cartridge||Type TA 1R1 (standard, round cut) / type TA 1E1 (elliptical cut)|
|Housing||Open aluminum frame with clamp|
|Mounting||Half inch with screws M2|
|Output voltage||0.3 mV (1 kHz)|
|Output impedance||40 Ohm (1 kHz)|
|Frequency range||22 – 23.000 Hz|
|Stylus pressure||26 mN +/- 0.4 mN|