Iblieve, there is definitely a range.
I think it goes something like this -
PDL
Standard(STD)
Upgraded STD
STD MkII
Upgraded MkII
ParaHelios(Reference)
Upgraded Reference
Online reviews are of the older two lesser models.
I am told, in good faith, the current Ref line is very special and quite astonishing.
From my experience so far I have zero reason to doubt it.
Going to find out for sure soon.
MkII over MkI was quite the ear opener and a wonderful personal experience!
As far as technical info -
Teo use different diameter and number of liquid conductor.
Probably different ratio mixtures but I am not sure on this one.
Different plugs, different assembly protocols and fine tuning some of which, as I understand, are very complex.
Teo do not disclose much of their shop knowledge for obvious reasons.
Of course many would love to know..... and some have tried apparently
I think it goes something like this -
PDL
Standard(STD)
Upgraded STD
STD MkII
Upgraded MkII
ParaHelios(Reference)
Upgraded Reference
Online reviews are of the older two lesser models.
I am told, in good faith, the current Ref line is very special and quite astonishing.
From my experience so far I have zero reason to doubt it.
Going to find out for sure soon.
MkII over MkI was quite the ear opener and a wonderful personal experience!
As far as technical info -
Teo use different diameter and number of liquid conductor.
Probably different ratio mixtures but I am not sure on this one.
Different plugs, different assembly protocols and fine tuning some of which, as I understand, are very complex.
Teo do not disclose much of their shop knowledge for obvious reasons.
Of course many would love to know..... and some have tried apparently