The TOA TU Series Driver Unit for Horn Speakers (TU-631/631M/651/651M) are engineered for professional sound reinforcement in both indoor and outdoor environments. When paired with an optional round horn, these driver units deliver clear announcements and reliable background music reproduction, making them suitable for schools, factories, commercial facilities, sports grounds, and public spaces.
The TU Series offers a wide lineup with four models, rated at 30W and 50W, providing options for different installation requirements. Users can select between high-impedance (70V/100V line) models or low-impedance (16Ω) models, ensuring seamless integration into new or existing PA systems. Because of this flexibility, installers can easily find the ideal solution for their specific application.
Each driver unit features a newly developed polyimide diaphragm designed to resist heat and moisture. This prevents deformation, improves durability, and enhances low-frequency performance, ensuring consistent sound quality over time. In addition, TOA minimized the gap between the diaphragm bobbin and magnetic circuit slit, which increases speaker efficiency and delivers powerful, distortion-free output.
The high-impedance models include a user-friendly input impedance selector switch, allowing adjustments from the outside without disassembly. This switch also features an OFF position to safeguard the speaker from incorrect impedance settings, thereby extending its lifespan.
Finished in gray (RAL 7042), the TU Series units blend seamlessly with off-white horns for discreet installations. Furthermore, their IP65 compliance ensures dust and water resistance, making them highly reliable even in challenging environments.
In conclusion, the TOA TU Series Driver Units combine durability, efficiency, and versatility to meet the demands of professional audio installations. Whether for voice paging, public announcements, or background music, they provide a robust and dependable performance.
Model: TU-651
Specifications:
| Specification | TU-631M (30 W) | TU-651M (50 W) |
| Frequency Response | 150 Hz – 6 kHz | 150 Hz – 6 kHz |
| Sensitivity (1 W, 1 m) | 110 dB | 110 dB |
| Rated Input (100 V line) | 30 W | 50 W |
| Tappings (100 V line) | 30 W (330 Ω) | 50 W (200 Ω) |
| 15 W (670 Ω) | 30 W (330 Ω) | |
| 15 W (670 Ω) | ||
| Rated Impedance (Low Z) | 16 Ω | 16 Ω |
| Weight | 1.9 kg | 1.9 kg |
| Applicable Horns | Round / Rectangular TOA Horns | Round / Rectangular TOA Horns |
| Diaphragm | Heat-resistant polyimide film | Heat-resistant polyimide film |
| Ingress Protection | IP65 (with compatible horn) | IP65 (with compatible horn) |
| Color | Gray (RAL 7042) | Gray (RAL 7042) |
