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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





Showing posts with label SHURE. Show all posts
Showing posts with label SHURE. Show all posts

Shure M95 HE cartridge

Phono pickup
This is the next-to-the top-of the line Shure pick-up, which incorporates the same stylus as is used in the top-of-the-line model. Overall the sound quality is very good, with slightly hot highs, with user-replaceable stylus (which may also be used by those who now own the M95 pickup) .
A magnetic pickup with a "Hyper-elliptical" stylus and built-in "hinged" stylus guard. Recommended vertical tracking force is 3/4 to 1-1/2 grams and best rsults were attained in the 1-1/4 to 1-1/2 gram range.
The Frequency Response measured ±3 dB from 20 to 15,000 Hz, rising to +4,5 dB at 20,000 Hz. Overall channel balance was within 2 dB. The worst-case stereo separation was 23 dB at 1000 Hz; 20 dB at 15,000 Hz.
This pickup sounds a lot better than it measures.

Specifications
Frequency Response: 20 - 20,000 Hz
Output (at 1,000 Hz):  4,7 mV (at 5 cm/sec peak recorded velocity
Channel Separation:  25 dB at 1 kHz (minimum)
Channell Balance:  within 2 dB
Tip Tracking Force:  0,75 - 1,5 grams
Total Tone Arm Tracking Force (Destaticizer on record):  1,25 to 2,0 grams
Force Exerted by Destaticizer:  0,5 grams
Typical Trackability (in cm/sec. Peak recorded velocity)
400 Hz :  24 cm/sec
1,000 Hz :  33 cm/sec
10,000 :  19 cm/sec
Inductance:  700 millihenries
DC Resistance:  1550 Ω
Optimum Load:  47 Ω 9resistance in parallel with 200 to 300 picofarads capacitance per channel)
Net Weight:  6,4 grams
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Shure M75ED Type2 (1972)

The M75ED type2 is High Trackability Cartridge with ¾ to 1½ gramme tracking.

This new improved cartrdige offers sound re-creation performance never before available in its price class. Optimized design, parameters give superior high frequency trackability and overall performance second only to the peerless V-15 Type II Improved. Gem-quality "naked" diamond tip is mounted directly to the stylus bar to reduce effective stylus tip mass - and improve trackability. Bi-radial Elliptical Dynetic Stylus. De Luxe moulede housing assembly. An excellent cartridge choice for use in finest quality playback equipment.

Specifications

Typical Trackability

400 Hz: 22 cm/sec

1,000 Hz: 33cm/sec

5,000 Hz: 28 cm/sec

10,000 Hz: 19 cm/sec

Frequency Response: 20 to 20,000 Hz

Output Voltage: 5,0 mV/channel at 1,000 Hz, 6 cm/sec

Channel Balance: within 2 dB

Channel Separation: over 25 dB at 1,000 Hz

Stylus: N75ED Type @ alliptical diamond tip

0,0007 in (0,018 mm) frontal radius

0,0002 in (0,005 mm) side contact radii

0,0010 in (0,025 mm) wids between records contact points

Tracking Force: ¾ to 1½ grammes

Recommended Load Impedance: Nominally 47,000 ohms per channel. Up to 70,000 ohms causes little audible change in frequency response.

Optimum Input Capacitance: 400 - 500 pF per channel including arm cable

Inductance: 720 mH

DC resistance: 630 ohms

Connections: 4-terminal

Mouting Centres: Standard ¾ inch

Weight Net: 6 grammes

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