Fosi Audio IM4: Los primeros Open-Back In-Ear Monitor que pruebo¡¡

FOSI IM4: https://fosiaudioshop.com/products/fo... I'm testing the Fosi Audio IM4, a pair of IEMs that are quite different thanks to their open-back design. In this video, I'll tell you how they sound, how they're built, and who they might be a good option for after testing them for several days. I'm testing the Fosi Audio IM4, which are quite different thanks to their open-back design. ******************************************************************************************************** FOSI Products: ZP3 Preamplifier -- https://fosiaudioshop.com/products/zp... V3 Power Amplifier -- https://fosiaudioshop.com/products/fo... ZD3 DAC -- https://fosiaudioshop.com/products/fo... PREAM PHONO BOXX5 -- https://fosiaudioshop.com/products/bo... SP601 SPEAKERS -- https://fosiaudioshop.com/products/sp... SW10 Subwoofer -- https://fosiaudioshop.com/products/sw... ZA3 Amplifier -- https://fosiaudioshop.com/products/fo... ZH3 Headphone Preamp and Amplifier -- https://fosiaudioshop.com/products/zh...