Dual CS 1249

Data

General

• Manufacturer: Dual
• Model: CS 1249
• Type: Record changer
• Years of manufacture: 1975 - 1978
• Made in: Germany
• Color: Black, Walnut, White
• Power consumption: 10 Watt
• Dimensions: 420 x 148 x 365 mm (WxHxD)
• Weight: 7.6 kg
• Original price approx.: 698 DM

Connections

• Outputs: 1 DIN 5pol. convertible also Cinch + ground

Technical Data Drive

• Drive: 8pin AC synchronous motor (Dual SM-840)
• Speed: 33 1/3 & 45 rpm
• Synchronous speed fluctuation: +/- 0,055 % (measured)
• Rumble noise ratio: unweighted: -45 dB, weighted: -67 dB (measured)
• Turntable: Non-magnetic,dynamically balanced,305 mm, 1,3 kg
• Rotational mass : 2,1kG incl. sub platter
• Operating mode: Belt
• Pitch: ±6%

Technical data tonearm

• Cardanic mounted straight aluminium tube tonearm
• Effective length: 222mm

Centre distance (platter bearing to tonearm pivot axis): 203mm

• Offset angle: 25,33 degrees
• Tangential tracking error angle: 0.16 degrees/cm
• Overhang: 16mm
• Overhang range: ~ 5mm
• Effective mass: ~12 gr. incl. TC
• Bearing friction: max. 0.07mN vert./0.16mN hor.
• Pickup ex works: Shure DM 103 ME
• 1. vert. Eigenresonance with it: ~ 6Hz
• Pickup is exchangeable: yes, with subheadshell e.g. TK24

Special Features

• Height-adjustable tone arm for changer operation
• External stroboscopic lamp
• Automatic continuous playback
• Subchassis suspension
• Counter oscillator in the counterweight of the tonearm
• Adjustable pick-up and lift-off points of the tonearm
• Manual operation with touchdown aid
• Adjustable lift height

Remarks

The 1249 has the same "Flywheel" belt drive with a sub-disc (ALU) attached to the axle and a turntable resting on it as the older 601 single player. However, it has a weaker platter bearing due to the interchangeable axle. Also, the zinc die-cast of the 601 has given way to the aluminium die-cast of the 1249. The tonearm of the 1249 has been reworked compared to the 601 and has a very low bearing friction and a counter-oscillator in the counterweight, which allows a high scanning capability and safe scanning even of cartridges that actually require a tonearm with a lower effective mass for optimal operation.

• Like all pre-ULM arms (Ultra Low Mass) from Dual, the arm of the 1249 belongs to the lighter medium weight arms with an effective mass of ~ 12gr. including subheadshell (TK).
• The motor is an 8-pole AC synchronous motor without servo electronics (SM840).

The speed fine adjustment is done mechanically by spreading a slotted drive roller and is very sensitive.

• Drive and tone arm are qualitatively superior to current Dual models (CS-455,505-4).
• The factory-installed pickup was chosen with consideration of the change function and is clearly below the capabilities of the device.
• When used as a single player, it is essential to install a higher quality cartridge.
• Even MCs are no problem as long as they are not explicitly designed for heavy arms.
• A few years ago still a bargain, he now achieves quite handsome prices in the second-hand market.

Pictures

• Picture: Dual CS 1249

• Excerpt from brochure: Dual CS 1249