1. BASF Professional I-II-III Cassette Bundle Description

The BASF Professional I-II-III Collectors Set comprises three 90-minute blank tape media—Professional I, Professional II, and Professional III—each engineered for professional recording and archival applications. Professional I uses a pure ferric-oxide (IEC I) formulation; Professional II employs a single-layer ferricobalt “pseudochrome” (IEC II) design; and Professional III features a dual-layer ferrichrome (IEC III) coating. All three variants deliver stable mechanical performance and consistent frequency response suitable for data backup and high-speed duplicator use.

2. BASF Professional I-II-III Cassette Bundle Technical Specifications

Professional I (IEC I)

• Tape Type: Ferric oxide-based
• Bias: Normal (100%)
• Equalization: 120 µs
• Saturation Remanence: ≈ 1 100 Gauss
• Recording Time: 90 min

Professional II (IEC II)

• Tape Type: Ferricobalt pseudochrome
• Bias: High (150% of normal)
• Equalization: 70 µs
• Dimensions: 3.81 mm × 131 m
• Recording Time: 90 min

Professional III (IEC III)

• Tape Type: Dual-layer ferrichrome (bottom ferric oxide, top chrome)
• Bias: Compatible with normal and high bias
• Equalization: 70 µs & 120 µs
• Construction Note: Bottom ferric-oxide layer enhances low-frequency response
• Recording Time: 90 min

3. User Reviews

• “Mechanically stable and clean-running tape, suitable for high-speed duplicator equipment.”
• “Reliable with a flat frequency response, making it suitable for diverse audio applications.”
• “Professionals appreciate the clean playback characteristics and consistent performance.”

4. BASF Professional I-II-III Cassette Bundle Key features

• Series Variety: Ferric (I), Ferricobalt (II), and Ferrichrome (III) formulations in one set
• Professional Calibration: Reference bias levels and equalization for IEC I–III decks
• Extended Duration: 90 min per tape for uninterrupted recording
• Mechanical Stability: Designed for reliable high-speed duplicator performance
• Archival Reliability: Stable magnetic formulations for long-term audio preservation