PG MASTER EQ
In 2015, I had already built a few custom Porter EQs, and I started rethinking parts of the original circuit, based on the experience gathered.
To be completely honest, the original idea was to put out a scaled back, "less controls", but "easy-to-do" version, but rather than cutting corners, I got lost in the details at every step of the processs, refining the essentials, rather than drowning it in features.
So, instead of dumbing the circuit down, it turned into a three year development and listening project, with numerous hours spent on circuit design and countless more hours spent in front of speakers, with friends and colleagues to turn it into what it is today.
What I have now feels like a very personal iteration of the circuit, with a new level of refinement. Still a Porter, because the parallel filter section is identical to the original design, but also, very much a Grinder, because everything else was re-engineered.
2 x 4 band equalizer
Six Q settings per mid band, five Q settings per low/high band
Shelving mode on high and low bands (switchable on the Q)
L-R/M-S switchable interface
23 step Blore-Edwards switches for gain and Frequency control
Gain of 0.5dB steps and a max of 5.5dB cut or boost per band
Split L-R/M-S master gain
Matched to better than 1% relative tolerance
Modern, precision in- & output section
€3290 ex VAT