Weather-proof 100 V audio transformer for connecting an 8-ohm loudspeaker to a 100 V public-address line. The transformer provides 20 W RMS rated power and selectable power tapping at 2.5 W, 5 W, 10 W, 15 W, or 20 W RMS. It has a 30–15,000 Hz frequency range, an IP65-rated plastic housing, and dimensions of 6.8 × 14.5 × 7.7 cm with a weight of 0.37 kg.