The RX-100H is a full-size DAT recorder made by Sharp, and introduced in 1987.
The RX-100H was part of the Optonica product range.
The RX-100H featured 4DD (4 direct drive) motors.
Included fixed and variable analog line level output sockets, and optical and coaxial digital input and output connectors.
High-Sampling D/A and A/D Conversion
The deck utilises independent left and right channel configurations for both D/A and A/D converters to ensure zero channel crosstalk.
4× Oversampling Digital Filter
The D/A stage uses a 16-bit, 4-times oversampling digital filter combined with a 4th-order active filter to eliminate high-frequency grid noise.
Anti-Aliasing Filter
To protect signal integrity during A/D conversion, it incorporates a highly precise GIC-type 9th-order active filter to suppress aliasing noise.
DC Amplifier Design
Uses a direct-coupled (DC) amplifier layout across all output stages to maximise linear fidelity and response across all audio frequency bands.
4-Motor Drive System
The transport mechanism is constructed with four direct-drive (DD) motors, offering high stability, long-term durability, and low wow-and-flutter.
Aluminium Die-Cast Chassis
Built on a rigid, heavy-duty metal foundation to isolate the tape transport and delicate optical tracking components from physical vibrations.
Optical Tension Servo
Leverages an advanced optical sensor framework to dynamically adjust tape tension, reducing physical wear on fragile digital tapes.
Digital Optical I/O
Outfitted with dedicated digital optical input and output terminals for pure, bit-perfect digital-to-digital cloning and transfers.
Isolated Power Supplies
The digital logic circuitry and sensitive analogue audio sections run on fully isolated power grids derived from separate transformer windings to block electrical cross-interference.
Subcode Support
Fully capable of writing and reading standard DAT subcodes for rapid track indexing, automatic skip markers, and timecode placement.
| Tape recording system | Rotary head type digital audio tape deck |
| Cassette tape dimensions | Width 73mm / Height 10.5mm / Depth 54mm |
| Loading system | Horizontal front loading |
| Recording system | Rotary head helical scanning |
| Recording sampling frequency | 48 kHz |
| Playback sampling frequency | 48 kHz or 44.1 kHz |
| Quantization | 16-bit linear |
| Tape speed | 8.15 mm/sec / 12.225 mm/sec (1.5× speed mode) |
| Fast forward time | 60 seconds or less (120-minute tape) |
| Rewind time | 60 seconds or less (120-minute tape) |
| Frequency response | 5Hz~22,000 Hz (±0.5 dB, fs = 48 kHz) |
| Total harmonic distortion | 0.005% (at 1 kHz, 0 dB) |
| S/N ratio | 92 dB |
| Dynamic range | 90 dB |
| Analog input connector | RCA pin socket ×2 |
| Analog input sensitivity | 300 mV (RECORD LEVEL control at MAX) |
| Analog input impedance | 50 kΩ |
| Analog output connector | RCA pin sockets ×2 (fixed and variable) |
| Analog output maximum level | 2V |
| Analog output load impedance | 10 kΩ or higher |
| Headphone connector | 6.3 mm diameter |
| Headphone maximum output | 26 mW (8Ω) |
| Headphone load impedance | 8~32Ω |
| Digital optical input connector | 3.5 mm diameter mini-plug optical ×1 |
| Digital optical input format | DAT Conference standard format |
| Digital coaxial input | 75Ω, 0.2 Vp-p |
| Digital coaxial output | 75Ω, 0.5 Vp-p |
| Digital optical output connector | 3.5 mm diameter mini-plug optical ×1 |
| Digital optical output format | DAT Conference standard format |
| Power supply | AC 220V, 50/60 Hz |
| Power consumption | 32W |
| Dimensions | 430(W) × 95(H) × 323(D) mm (including legs, knobs and terminals) |
| Weight | 6.8 kg |
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