Black Lion Audio are fans of inductor-based equalizer. While the Black Lion Audio Dual 15 Band AMCHA1 Equalizer doesn't offer the surgical precision of its solid-state based gyrator circuit cousin, it has a wonderful musical quality that's very natural sounding. Typically a good inductor equalizer has, in the past, been rather expensive to purchase. A classic API or Pultec-based equalizer will set you back a few thousand dollars for a stereo pair.
Since Black Lion Audio enjoys a good challenge, their goal was to develop a transformer coupled two channel inductor based equalizer that could perform every bit as well as a high priced mastering-grade setup, but do it at a lower price. Since there are lots of Pultec clones out there, they wanted to develop something that was unique.
Black Lion Audio based it on what's known as a state-variable filter, and built it around custom wound Cinemag inductors. They gave it overlapping frequencies within each set of frequency bands to enable flexibility and frequency correction when needed. They used grain oriented silicon steel transformers for the input and output stages to give the audio a nice vintage character.
And since Black Lion Audio has access to a few mastering-grade inductor equalizer's, they tweaked and refined the circuit until they were satisfied that it was every bit as good as the expensive brands. The AMCHA1 Equalizer has smooth highs, natural mids, and thick, powerful bass that only a good inductor equalizer can deliver. Go ahead; shoot it out against your Neve, Massenburg, API, or Tube Tech. Black Lion Audio thinks you'll be very impressed.