home › Forums › General Discussion › Toroid 2 and PX (including bass focus) panel upgrades for U1-790! › Reply To: Toroid 2 and PX (including bass focus) panel upgrades for U1-790!
1. About $2300 in 2013.
2. About $7500 in 2016 for original PX.
3. Backplates were sent to Sound Lab for upgrade so they kept old parts. Kept old cores for many years but eventually tossed them.
4. Very satisfied with both purchases. Improved bass response, sensitivity and tonal neutrality