I recently puchased the Summit Audio 2BA-221 preamp to have a tube-blend option for warming up my DAW input. It sounded so good direct into my audio interface that I stopped using an outboard mixer for tone control, inserts, and effects looping. I can loop outboard effects via SPDIF off the audio interface, and the 2BA-221 has an insert. The only rub was that I lost outboard tone control. Soft fx are great for soft-synths, but I like to control real-world instruments with real-world gear. So I called Jason at Sweetwater and told him I was thinking of buying the EQ3B since the parametric eq on my Eureka worked fine. He talked me into the FeQ-50 with the rationale that it would equal the quality vibe of my 2BA-221. I am so happy he did. This unit would appear to have less functionality that other eqs because the Q is not continuous (only narrow or wide) and the frequency selections are kind of coarsely quantized. Nonetheless this thing sounds so good that any worries of limitations are quickly replaced with amazement of how effectively you can shape your sound via the detents and swiches. I feel like I can dial in the exact sound I'm looking for in no time. When I turn on the bypass, the difference is night and day. The think is dead quiet and retains the warmth of the 2BA-221. I used to think of eq strictly to solve problems like rumble and hiss. With this unit I think of eq as a creative tool.