OMNITRONIC ELA-T30 is a 30 W RMS 100 V audio transformer for amplifiers or speakers without a built-in 100 V transformer. It converts low-impedance audio signals to 100 V signals and provides five selectable power taps: 3.75 W, 7.5 W, 15 W, 22.5 W and 30 W RMS. The transformer supports 4, 8 and 16 ohm connections, has a frequency range of 40–17,000 Hz, and measures 9.3 × 5.7 × 5.6 cm with a weight of 0.64 kg.