TDK PRO SM & SM-X - 1997 - US
"These TDK PRO cassettes have the SA and SA-X formulations that have been the benchmark for Type II cassettes for many years. This TDK SA formulation was what the deck manufacturers used to calibrate their decks to, especially those manufactured in Japan. No need for biasing, these just sound wonderful in any well maintained deck." Tony Villa
Note 1: SM10: 10 Minutes: Open! Lightly scuffed case. No wrapper. Never used. J-card and labels never used. Only 1 available.
Note 2: SM10: 10 Minutes: Lightly scuffed wrapper. One tiny cut on the reverse side. You might be able to see it in the pictures provided. SOLD
Note 3: SM30: 30 Minutes: Lightly scuffed wrappers. SOLD
Note 4: SM-X10: 10 Minutes: Light to moderate scuffing. No rips, no cuts. SOLD
Note 5: SM-X30: 30 Minutes: Light to moderate scuffing. Only 2 available
About TDK:
TDK’s origins trace back to 1935, when the Tokyo Denki Kagaku Kogyo company was founded to commercialize ferrite, a magnetic material invented by Dr. Takeshi Takei that would become central to modern recording technology. By the 1950s and 1960s, TDK had evolved from a materials science firm into one of Japan’s most important manufacturers of magnetic tape, supplying both industrial and consumer markets.
With the rise of the Compact Cassette, TDK quickly established itself as a global benchmark for tape quality. Their formulations, especially the AD (Normal), SA (CrO₂), and MA (pure metal particle) series became reference points for consistency, durability, and performance. The SA and MA lines earned near‑legendary status among home recordists and audiophiles, helping define what “premium” cassette tape meant throughout the 1970s, 1980s, and 1990s.
TDK eventually sold its magnetic tape business to Imation in 2007. Today it is a major supplier worldwide of electronic components, sensors, and energy devices. Its strong focus on advanced materials and sectors such as EVs, renewables, and industrial automation keeps it positioned as a top-tier technology company.
TDK PRO SM & SM-X - 1997 - US