Well I un-watered-down my unit (I guess that would be "concentrating" it). Mine now has all metal foil and metal film resistors, high speed OPA827 opamps, and high quality PP, PS and copper foil/PIO caps. I also moved the power supply and the output circuits off the main EQ board to reduce interference, upgraded the capacitor filter to a CRC, added Bybee Music Rails DC power conditioners to both the + and - power supplies, inserted a TI-shield shield between the noisy power supply section and the rest of the unit, and built a directly DC-coupled output curcuit using very low DC-offset opamps to replace the stock MOSFETs. I also replaced a couple of the resistors with cermet pots so that I could tailor the response curves to be different for each channel to suit my room.
Here's what the inside of the unit looks like now:
Modified LF EQ Unit
Here's what the inside of the unit looks like now:
Modified LF EQ Unit