Based on this product's specifications, here are some alternatives and similar models
Audio preamplifier Behringer UV1 — input impedance 4000 Ω, 15 W, 483×150×44 mm, black/red
Summary description:
Behringer UV1 is an audio preamplifier designed to boost low‑level signals for recording and live sound. It features a 4000 Ω input impedance, typical power consumption of 15 W, and a rack‑width chassis sized 483 × 150 × 44 mm. Finished in black and red, the unit suits studio, rehearsal and small live PA setups requiring reliable preamplification.