TDK AD
The TDK Reference Standard Series offers outstanding quality for a broad range of recording needs. Each tape in the Reference Standard Series is a product of TDK’s advanced tape technology.
Each is made from the finest raw materials and manufactured to TDK’s exacting standards.
Their superior mechanisms work together with the tape and your deck for the finest sound reproduction possible. Premium quality normal bias cassette. Ideal for portables and high-energy contemporary music due to its unique high frequency response.
Acoustic Dynamic, the successor to the famous Super Dynamic, which delivers clear, crisp, brilliant reproduction of today’s complex sounds with “Normal” bias. But there’s nothing normal about the new coating which evolved from continuous research. The specialists succeeded in
developing a new linear ferric oxide particle obtaining superior coercivity with the result that Acoustic Dynamic is completely compatible with virtually all cassette decks guaranteeing a
wider dynamic range and frequency response which extends well into the high end. Acoustic Dynamic tape is housed in a new superior precision cassette body to ensure accurate running characteristics. Leave the switch at “Normal” and hear for yourself the magnificent sound of TDK Acoustic .
First appearance in 1977.
TDK Audio Cassette Selector Guide
TDK AD
Recording source
Voice / Lecture – Alternate
AM / FM Broadcast – Best Match
Prerecorded cassette – Best Match
LP’s / Records – Alternate
System Used
Boombox style portable stereo – Best Match
Personal portable stereo – Alternate
Car stereo – Best Match
Compact home stereo – Best Match
TDK AD-54 Acoustic Dynamic Cassette Type I
Out of stock
TDK AD-54
Brand New
49.00€
Out of stock
Brand: TDK
Model: AD
Tape Length: C – 54
Country: Japan
Release Year: 1982
Timeline: 1982 – 1983
Sort: AD
Series: Complete series in catalog
Position: Ferro
Tape Type: Type I
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Brand NewMetal
“Type IV” tapes using pure metal particles (as opposed to
oxide formulations) were introduced in 1979 by 3M under
the trade name Metafine.
The metal-formulated audio cassette hit the scene as the
answer to a number of problems with previous tape
formulations. The standard Ferric-oxide (Type I) tape had
typically rendered poor high frequency definition.
Two subsequent solutions had been developed: the first
(Type Il) being a chrome (CrO2) Formulation, which rendered
much better frequency reproduction and very low noise
(hiss) at the expense of some output level and low-frequency
solidity. The second solution, ferro-chrome (Type II), was an
attempt to restore some low-frequency firmness to the
bright and airy sound of chrome, by adding a second coating
layer (ferric) to the existing chrome formulation. Fundamentally,
it was a technically imperfect innovation, and it wasn’t
significant enough an improvement over standard chrome.
Enter the Type IV tape, with a completely new formulation,
of metal particles. The advantages were quickly recognized.
This was a very hard-wearing tape, which could take much
higher sound levels than a chrome, whilst reproducing equal
or better high frequency definition, and a firmer bass — but,
without losing the spacious midrange in the way Ferro-
chromes could.
The disadvantages were quickly recognized too;
excess wear on the tape heads, and excess cost in the
retail price being the most significant. In order to get 20%
better sound, you have to spend 80% more.
The metal audio tape was, however, considered worth
persevering with. Efforts were made to solve the problem
of wear, and in the course of the early 1980s the Type IV
cassette did start to catch on.
By the mid 1980s, metal tapes had been adopted by a lot
of enthusiasts, but they remained too expensive to be bought in
bulk by the average consumer.
Metal cassettes (IEC Type IV) also use 70 µs equalization.SKU: n/a
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