Check the listing for details. Grace Design FELiX 2 Instrument Preamp/Blender - Silver. Condition: New. Listed at 1255.00 USD. Audiophile Dual-channel Instrument Preamp and Blender Get studio-quality sound at your next gig with the Grace Design FELiX 2, an updated version of the renowned instrument preamp and signal blender preferred by discerning acoustic musicians. Newly equipped with stereo operation, the FELiX 2 includes a stereo amp output and a dual mono or true stereo FX loop for adding depth and dimension to your performance. Plug in two instruments, or one instrument and one microphone, and dial in immaculate sound with separate EQ sections. Here at Sweetwater, we've found that the powerful EQ controls on the FELiX 2 really allow you to sculpt the sound of any instrument to perfection. Other useful features include a dedicated tuner out, a boost function, and a stereo headphone output.