Discrete solid state two-channel parametric EQ. World's first (and only) all-discrete, true differential Class-A input buffer/amplifier Selectable balanced or unbalanced input Greatly improved 3rd generation FSA-03 all-discrete EQ amplifier Improved output stage True hard-wire bypass when EQ not selected Upgraded power supply Fully parametric stereo EQ with unprecedented sonic purity and integrity All discrete J-FET solid state signal path Minimalist design: only one active stage in the audio path (Dove Topology) Identical EQ stage used in Library of Congress archiving path Four EQ bands: 20 Hz to 20 kHz center frequency, 0.4 to 4.0 Q Extremely low noise: -106 dBu Constructed for demanding professional applications Ultra-Premium components throughout Gold relays, connectors, switches, Silver Teflon power wiring, Mogami Neglex OFC audio wiring Lovingly hand-crafted in Northern California