The 341 Dual 15 Band and 351 31 Band EQs feature XLR, TRS and RCA input and output connectors. Switchable boost/ cut range and constant-Q filtering is also standard. The 351 adds variable hi-pass and low-pass filtering to this impressive EQ line. For the precision of a 1/3 octave EQ in a flexible stereo configuration, the 355 dual 31 band is your choice.