Based on this product's specifications, here are some alternatives and similar models
Transformer Omnitronic ELA-T20 20W — audio transformer for 20 W systems
Summary description:
Omnitronic ELA-T20 is a 20 W transformer designed for audio and public address applications. It provides impedance matching and power handling for 20-watt speaker lines and PA equipment. Typical use includes connecting speakers to amplifiers in small installations, enabling reliable signal transfer and protection against mismatched loads.