SP-1

Hehehe... parametic eq with just ONE frequency band?!

If you are looking for a similar effect, the BJF Sea Blue EQ or the Antelope Morning Dew (discontinued) will do, and they both cover much greater range/functionality.
 
its a RC3403A Ground Sensing Quad Operational Amplifier (Chip) based select frequency booster with x4 internal trimpots. :D
 
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