What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Thorens TD-524 (1982)

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: 33, 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

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