@lewm
Ok I verified sound track from cartridge to the "phone stage pre-amplifier"- (I think that is correct name of it)- all good that way.
Yes they both have similar sonic characteristics, and after conversation with Pass tech support I realized that they are designed to handle most cartridges on the market, even those hard to load. In matter of the fact they are easily can overload any cartridge.
So what I understood was, just because unit can do it it does not mean that it will work with cartridge+tone arm+ connecting single post wire, exactly same way.
They are design to be versatile so it means you need to do your home work with setting it up. Sure you can go by suggestion of cartridge maker or owner manual but last decision how it sounds is ultimately owners choice. There are people who are happy with 66db at 100Ohm load, some are like me and looking for best possible performance.
1k is good 500 ohm not bad lets see how 825 ohm sounds like and I'll get back to you.