The speaker shall be a bass-reflex 5" (12cm) cone type suitable for ceiling and wall mounting. Input impedance shall be easily adjustable with rotary switch on the upper side of the speaker. The speaker shall include a transformer having multiple taps (1W, 3W, 6W at 100V and 0.5W, 1.5W, 3W at 70V) adjustable. The output sound pressure level at a distance of 1m with a 1W input level applied shall be 90 dB SPL. The speaker shall have a frequency response of 100 – 18,000Hz (-20dB).

The speaker enclosure shall be constructed of HIPS resin. The grille shall be constructed of surface-treated steel plate net. The speaker shall be available in off-white color, and shall be easily repaintable. The unit shall have dimensions of ø186 x 369 (H) mm (ø 7.32” x 14.33”), and a weight of 1.5 kg (3.31 lbs.).

The speaker shall be a TOA model PJ-64