The DH‑744 is a professional dual‑channel wireless microphone system designed to deliver clear, untethered vocal performance for events, public speaking, music, and gatherings. It includes two handheld wireless microphones paired with a dedicated receiver unit, making it ideal for applications like karaoke, live concerts, conferences, seminars, school functions, and worship services.
| Specification | Detail |
|---|---|
| System Type | Dual‑channel VHF wireless microphone system (2 mics + receiver) |
| Frequency Range | ~170–270 MHz (VHF high band) |
| Operating Distance | Up to ~100 m (line‑of‑sight) |
| Frequency Stability | ±30 ppm (quartz controlled) |
| Modulation Mode | FM (frequency modulation) |
| Frequency Response | ~40 Hz – 15 kHz (some versions ~40 Hz – 20 kHz) |
| Dynamic Range / S/N Ratio | >90 dB (typical) / >100 dB overall S/N |
| Total Harmonic Distortion (THD) | ~0.8 % (typical) |
| Receiver Output | Unbalanced audio output (e.g., ~0–0.5 V) |
| Transmitter Output Power | ~10–15 mW RF (typical) |
| Microphone Element | Unidirectional / dynamic handheld mic |
| Battery (Mic) | 9 V or AA batteries (depending on version) |
| Receiver Power | DC 12 V (adapter included) |
| Suitable Use | PA, karaoke, conferences, live vocals, schools, church events |
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