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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





ADC XLM phono cartridge

The ADC XLM cartridge - this is the only cartridge we have seen that is really capable of tracking almost all stereo discs at 0,4 grams.

The Sound Authorities go on to say: "the XLM went through the usual torture test at 0,4 grams (some models require more than a gram)….the XLM is capable of reproducing anything found on a phonograph record." "the CBS STR-100 test record showed less than ±1,5 dB variation up to 20,000 Hz … response is within ±2 dB over the entire range, and Frequency Response is exceptionally flat."

"Distortion readings, are almost without exception better than those for any other model we've tested, … the XLM has remarkably low distortion in comparison with others, …at 0,6 grams the distortion was low  - under 1,5 percent."

"The XLM could be instrumental in lowering the input noise from the first stage of a modern transistor amplifier, … the cartridge had very good shielding against induced hum."

"This would be a very hard cartridge to surpass at any price, … we found it impossible to attribute superior sound to costlier competing models,  priced as it is, it is a rel bargain in cartridges."

Specifications

Company (Year):  ADC (1971)

Body/Molding/Stylus:  Gold / Black /Black

Stylus:  RXL

Stylus Tip:  .3 x .7 mil

Stylus Mount:  Nude

Compliance:  50 cu

Tracking Force:  .4 - 1 g

Frequency Response:  10 - 25,000 Hz

Channel Balance:  2 dB at 1 kHz

Output:  0,85 mV

Channel Separation:  25 dB at 1 kHz

Inductance:  300 mH

Resistance:  625 Ω

Capacitance:  235 pF

Weight:  5,5 grams

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