TOA TH-660 600MM Flare + Tu631M Driver Kit

TOA's TU Series Driver Units are designed to be used in combination with TOA's TH-650 or TH-660 round horn. The TH/TU combined speaker can be used for both indoor and outdoor applications, as well as for background music reproduction.
The lineup includes four models rated at 30 W (TU-631 and TU-631M) and 50 W (TU-651 and TU-651M). The "M"-type models are designed for use in high-impedance (70V/100V lines) systems and standard models for low-impedance (16 Ω) systems. This wide product lineup permits selection of the ideal speaker for most applications.
TU Series driver units feature newly developed diaphragms employing special heat-resistant polyimide film to prevent the diaphragm from absorbing moisture and changing shape, as well as to improve the low frequency characteristics. High speaker efficiency has also been realized by minimizing the gap produced when the diaphragm bobbin is installed in the magnetic circuitry slit.

High-impedance models are equipped with an input impedance selector switch which facilitates impedance settings without requiring disassembly. The switch is also equipped with an OFF position to prevent speaker damage resulting from incorrect impedance setting.

TH Series horns have two types of 500 mm and 600 mm in diameter. Both types of features TOA's round shape to ensure high speech clarity and sound quality suitable for music reproduction. External hardware (screws, bolts, nuts) is made of stainless steel, while the mounting bracket and the horn itself are treated with 50-micron thick powder paint coating which is about three times thicker than that of the conventional horns.

All of these factors combine to ensure the speaker's excellent weatherproofing and corrosion resistance. In addition, the external horn flare is made of aluminium which is more shock-resistant than resin.