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Blank Cassettes: Audio



Blank Cassettes: Audio

Brand: ICM
Model:Superferro SDX I (Turbo)
Tape Length: 90
Country:  Switzerland
Magnetic Layer: Iron oxide (Fe2O3)
Release Year: 1989
Timeline: 1988 - 1990
Sort: SDX I
Series: Complete series in catalog
Position:Ferro
Tape Type:Type I
Rating:Rate
Collections:  Collection     Wishlist 
Community:1 Collection
Price Guide:Valuation Page
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Comments and Reviews
 
HOOK45 SUBS
24th Oct 2023
 Review
ICM Superferro SDX I

Points - 59


Quality level Lower Middle Class

Signal-to-noise (S/N, SNR) (dB) 61
Treble (dB) 48.5
Frequency response 10 kHz/315 Hz (dB) -1.5
Sensitivity 315 Hz (dB) -0.5
Level fluctuations and dropouts (score) 4
Modulation signal-to-noise ratio (dB) 46
Copy loss (dB) 52
Azimuth error (score) 3
Synchronization fluctuations (±%) 0.21
Hum attenuation (score) 2
Price-value ratio Adequate

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HOOK45 SUBS
24th Oct 2023
 Review
Azymuth error
For good reproduction from a tape system, it is essential that the angle of the head gap on replay is exactly the same as was present on record with respect to the plane in which the tape is moving. In an audio system, the head gap is exactly vertical and at 90 to the direction of tape travel. If either the record or replay head gap is tilted away from the vertical, even by a very small amount, tremendous signal losses occur at high and medium frequencies, the cut-off point traveling further down the frequency spectrum as the head tilt or azimuth error is increased. If the same head is used for record and replay (as is usually the case in audio tape recorders), the azimuth error will not be noticed, because there is no azimuth difference between record and replay systems.
Frequency response
An indication of a recorder's ability to reproduce all the audio frequencies supplied to it without altering the original balance among them.
A perfect frequency response would extend at least from 20 to 20,000 Hz (the
traditional and numerically convenient limits of human hearing) with a +0dB
deviation.
Signal-to-noise (S/N, SNR)
Signal-to-noise ratio (SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. SNR is defined as the ratio of signal power to noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise.
Treble
Treble describes tones of high frequency or high pitch, ranging from 6 kHz to 20 kHz, comprising the higher end of the human hearing range. In music, this corresponds to high notes.

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HOOK45 SUBS
24th Oct 2023
 Review
Inexpensive cassettes commonly are labeled
Low-noise, but typically are not optimized
for high frequency response. For this reason,
some low-grade IEC Type I tapes have been
marketed specifically as better suited for
voice or AM radio programs than for music
recording.
Simple voice recorders and earlier cassette
decks are designed to work with standard
ferric formulations. Newer tape decks usually
are built with switches and later detectors for
the different BIAS and equalization requirements
for higher grade tapes. The most common,
iron oxide tapes (defined by the IEC 60094
standard, as "Type I") use 120 µs equalization.
In 1973, Pfizer produced a new pigment of iron
oxide, MO 2228, so a new generation of Ferric
tapes has emerged, a better quality one.
The quality normally is reflected in the price;
Type I cassettes generally are the cheapest.
In comparative terms of sale, the Ferro cassettes
occupy the first place.
⚜️⚜️⚜️⚜️⚜️

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HOOK45 SUBS
24th Oct 2023
 Review
⚜️⚜️⚜️
⚜️⚜️
⚜️

Iron Oxide

Iron(III) oxide or ferric oxide is the inorganic
compound with the formula Fe2O3.
Iron (III) oxide was the most common
magnetic particle used in all types of magnetic
storage, magnetic tapes and recording media.
Cassette tapes are made of a polyester-type
plastic film with a magnetic coating.
The original magnetic material was based on
gamma ferric oxide (Fe2O3).

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HOOK45 SUBS
24th Oct 2023
 Review
High quality guaranteed by
- precision cassette housing
- high grade tape material (for clear and naturel music reproduction)
- patented hubs (CH, GB, USA) for visual tape control
- special law-abrasion liners for optimum tape transport
- nameless tape guidance

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