Equalizer in a Hi Fi system

Turntable - Michell Gyro SE, Michell tonearm, Transfiguration Proteus moving coil cartridge, Bob's Devices Step up transformer and silver interconnects, Botttlehead phono preamp

Preamp - Bottlehead 300B

Marchand two way crossover 

(2) Bottlehead 2A3 single ended amps for full range Voxativ drivers and Fostex supertweeter on Open baffles

(2) Heathkit UM-2 push--pull amps modified for adjustable feeeback for TAD 1601a Woofers in sealed cabinet

Interconnects Goertz Micropurl silver and DIY 28 ga 

Speaker wire - Nordost flat wire

Made a new audio friend locally. His DIY system is listed above. He came to my house and evaluated my system. He said it was very impressive and the PEQ-1 was way beyond what he imagined an equalizer could do. Basically, he said it was transformative for my system and sounded much like a speaker upgrade. He said he could not hear any audible degradation or hiss the way I am using it. FINALLY, another audiophile has HEARD what I’m doing and validated it!  I’m so happy!  I KNEW I had something special going on!

BTW, vinyl on his bi amped system is absolutely unbeatable. Never heard anything like it. So he knows what good sound is!

Thanks over the last many pages of this rather long thread to the likes of @dgarretson ​​@mirolab and others for helping to validate the the professional studio analog EQ approach!