thanks for the kind words. There is not a huge difference between the PH12 and PH14 phono preamps,
except the PH14 has an extra tube (12AU7) buffered output and the EQ has been perfectly optimized, and it has it's own dedicated power supply.
(The PH12 EQ is +/- 0.5db from 10Hz to 40KHz, assuming it has a 50K load, which it does when mated with an SP12)
(The PH14 EQ is +/- 0.1db from 10Hz to 40KHz, the buffered output means there is no load on the EQ section)
This makes it a better choice for someone that already has a great line stage preamp but wants a better phono preamp.
T Madden has a post on somewhere on this forum about his experience with the PH14 and PH12. it's here
I'm currently building two of my latest PH15 phono preamps (someone always wants something better!!) this is the same circuit but with a totally new circuit board layout design, with no worries about size (it's more than twice as large as the PH14 and 4X as large as the PH12) and uses ONLY premium grade components, $70 worth of capacitors upgrades and $20 to $70 worth of resistor upgrades ($4 each piece Caddock) for those customers that want ONLY the very best.