OMNITRONIC ELA-T20 is a passive 100 V audio transformer for amplifiers or speakers without an integrated 100 V transformer. It converts low-impedance audio signals to 100 V signals and supports 2.5 W, 5 W, 10 W, 15 W and 20 W RMS power taps. The transformer supports 4, 8 and 16 ohm connections, has a frequency range of 40 to 17,000 Hz, and measures 8.5 by 5.4 by 5 cm with a weight of 0.38 kg.