Review on Enhanced Noise Filter and High-Level to RCA Converter by BOSS Audio Systems for Optimal Car Audio System Performance by Michael Reese

Noise Filter B25N A ground loop isolator has been placed in the subwoofer signal path. Pioneer VSX1122 Subwoofer Output > B25N > The Crown XLi800 B25N input features male and female RCA connectors so installation is a breeze, just plug it into the signal path. did not notice any audible change (signal attenuation) from the B25N in the signal path. I probably wouldn't be able to see anything as only 50Hz and below goes to the XLi800 amp. The hiss of the subwoofers before the B25N was installed contained much higher frequencies, although the subwoofers crossed at 50Hz. The noise was being generated by a tiny Lenovo M93 PC connected via HDMI (also part of a home theater system) when some sort of memory/disk access was occurring. 07/31/2022