Our DIY version had more reliable switches, an isolation transformer on the input and a make-up amplifier with an output transformer."Īlso, please check the manual out. If you couldn't afford one, you bought a Pultec. The Langevin graphic equalizer was the standard high-end bus equalizer in the U.S. ![]() As I said earlier, these EQs were so popular, they were practically the only studio items taken from Hitsville to LA. John Windt built the first six at Hitsville, while the follow-up 40 units were built offsite to their exact specifications. Mike McLean conceived of a military-grade replacement unit that could withstand the rigors of constant use, but with near perfect specs and unit to unit consistency, that could be auditioned with built in make-up gain, all terminated with 600 ohm transformers. Also the passive insertion loss was inconvenient. ![]() However, the Langevin EQs suffered from frequent issues, especially with Hitsville's near 24-recording schedule. Langevin was a hugely popular EQ, and within Hitsville, this was no exception. For me, this equates to a really easy and practical tone shaping tool. The beauty of the center frequencies is they the represent the seven bands in the audio spectrum you learn about in Recording 101. The Hitsville EQ's filters are an exact circuit lift from the Langevin 252 A seven band graphic EQ designed by Arthur Davis. Are these specific frequencies that they liked, etc etc.?" ![]() ![]() "Wonder what the thought process of the Motown guys who custom designed this was.
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