With this project, Thorens intended to offer disc-jokeeys, dance teachers and professional users, a transcription turntable meeteing thier specific requirements both from the basic performances and from the convenience of use points of view.
Considering the exacting operation conditions, new solution had to be found in order to guarantee uncoloured reproduction in this particular field. The lay-out of all function controls as well as the specific requirements for this turntable have been developped in cooperation with several renowed disc-jokeys. The acoustic characteristics of the TD-524 have also been tested and refined in some of the most reputed discotheques.
The heavy casting chassis is resiliently suspended in a massive wooden base. The spring suspension elements have been meticulously calculated in order to suppress any vibrations or acoustic feedback.
The rotational vibrations occasioned by the fast start of the unit are eliminated by means of a special compensation device. The turntable platter has a diameter of 330 mm and it incorporates a cueing ring. The momentum of inertia of the platter amounts to 200,000 gr/cm². The high damping rubber mat prevents any vibration of both the platter and the record.
Equipped with the isotrack TP16L tonearm, the turntable TD-524 can be used either manually or with semiautomatic operation. Luminescent diodes indicate the selected mode.
Drive system: Direct Drive Thorens
Motor: Low polarity DC motor with 256 pole tachogenerator-incorporated long life lubrification system
Motor speed contol: Quartz
Pitch control: ±6% resp. ±25% commutable
Speeds: 33⅓, 45, and 78 rpm
Speed accuracy: ±0
Turntable Platter: Aluminium alloy with high damping rubber mat
Platter diameter: 330 mm with cueing rubber mat
Rumble unweighted: -52 dB according to DIN 45539
Wow and flutter:
measured with test record: <0,035% according to DIN 45507
Calculated value resulting from the desing: <0,01%
Tonearm Isotrack TP16 (Long)
Effective lenght: 245 mm
Offset angle: 22°
Scating compensation: magnetic force without friction
Stylus pressure appliance: by calibrated spring
Bearing friction: ±0,15 mN (15 mg) in both planes
Cartridge fitting: standard 12" centres
Remote controlfor: Tonearm lift, start-stop, pitch control, start from the mixing console, commutation between quartz lock
Dimensions: 500 x 445 x 180 mm