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Product Information

  Rondo
  Ortofon > Cartridge
Rondo Blue
Rondo Bronze
Rondo Red
TECHNICAL DATA
RONDO
Bronze
RONDO
Blue
RONDO
Red
Output voltage at 1000 Hz, 5cm/sec. 500 µV 500 µV 500 µV
Channel balance at 1 kHz 1 dB 1,5 dB 2 dB
Channel separation at 1 kHz 25 dB 25 dB 22 dB
Channel separation at 15 kHz 18 dB 18 dB 15 dB
Frequency range at - 3dB 20-40.000 Hz 20-35.000 Hz 20-30.000 Hz
Frequency response FIM distortion at recommended 20-20.000 Hz ±1,5 dB 20-20.000 Hz ±1,5 dB 20-20.000 Hz ±2 dB
Tracking force, DIN 45.542 < 1% < 1% < 1%
Tracking ability at 315Hz at recommended tracking force 90 µm 85 µm 80 µm
Compliance, dynamic, lateral 15 µm/mN 15 µm/mN 15 µm/mN
Stylus type Nude FG80, tapered Al. cantilever Nude FG70, Al. cantilever Nude elliptical Al. cantilever
Stylus tip radius r/R 5/80 µm r/R 5/70 µm r/R 8/18 µm
Equivalent stylus tip mass 0,30 mg 0,30 mg 0,30 mg
Tracking force range 2-2.5 g
(20-25 mN)
2-2.5 g
(20-25 mN)
2-2.5 g
(20-25 mN)
Tracking force, recommended 2.3 g
(23 mN)
2.3 g
(23 mN)
2.3 g
(23 mN)
Tracking angle 20° 20° 20°
Internal impedance, DC resistance 6 Ohm 6 Ohm 6 Ohm
Recommended load impedance 10-200 Ohm 10-200 Ohm 10-200 Ohm
Cartridge body material Grinded wood/Resin comp. Grinded wood/Resin com. Grinded wood/Resin comp.
Cartridge colour Bronze Blue Red
Cartridge weight 10.5 g 10.5 g 10.5 g

Review

Profile of Ortofon

Ortofon was founded in 1918 by two Danish engineers, Axel Petersen and Arnold Poulsen. These two pioneers had one very clear objective in mind - to put sound onto film, and with this, they established the Electrical Fonofilms Company A/S, which later on was renamed Ortofon A/S. A few years later, in the Palace Theatre, Copenhagen, they were able to present the first fully-synchronized sound films and in so doing, created a world sensation.

Ortofon was also the first company to produce an outdoor sound film recording. The founders took out several patents and issued licences to film companies the world over for their "System Petersen og Poulsen", which is even to this day the basis for film with optical sound.

Until the second world war, Ortofon's growth was based entirely on the sound film. However, during the war and immediately afterwards, production was re-organized to include record cutting and reproducing equipment. The first Moving Coil cutterhead was produced as early as 1945, and the Moving Coil principle was then further developed to enable production of, first, mono cartridges and, later, also stereo cartridges.

During this busy period of growth, equipment was also being developed for broadcasting networks and recording studios. It was not until later that the Company decided to specialize solely in the development and production of cartridges. Unique experience at both ends of the recording sequence results in unsurpassed performence from every Ortofon cartridge.

Manufacturer's website

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