Originally Posted by eric65
It is very damage that Stax who produces also good headphones, for all scholarships, are unable to manufacture amplifiers better than their current top of the line.
Because, let's face it, as many their amplifiers work wonderfully with the Lambda series headphones ,as this isn't the panacea to power the Omega headphones, more demanding in power (especially the SR-007 mk1/mk2); the result of the SRM-727 with the SR-007 mk2 is frankly mediocre for cleanliness and the dynamics of the bass; It's better with 009 provided they do not push to a volume too loud this headphone.
There is better as amplifiers; damage that Stax, which ought to be reinforced in the success of the 009, leaves the place to other amplifier manufacturers, to honour, at its fair value, its flagship. I hope that a burst of pride on the part of Stax will correct the situation.
Besides the economic reasons poined by others, one has to remember direct drive high voltage amplifiers have to conform to certain rules by the governing bodies regarding safety. This is no joke - an amp really well designed to impeccably drive electrostatics, particularly in the treble, unfortunately doubles as an electr(ostat)ic
chair. Above so-and-so-much current an amp can spit out under worse conditions, it is banned - at least within EU. And that does have a perfectly understandable reason - unless you want to play "russian roulette" or have developed the notion of leaving this world while experiencing "the ultimate transient".
I do not know the exact limitation imposed by the EU - but it is way less than it would be required to really properly power the electrostatics. Stax certainly DO know the rules - and they build perhaps up to just slightly below in order to remain legit. They certainly can not afford being sued by the widow of the electrostatic-late sheik or anyone else - can they ?
I have built my DIY amp decades ago - dwarfing anything ever seen to power the headphones by others by (almost) an order of magnitude - and certain to give the EU engineers an instant heart attack upon merely seeing the voltage/current figures. It does sound better, MUCH better - but ultimately I went with SRM1MK2/Lambda Pro, accepting the limitations, since *somehow* the plan is to roam this Earth for a while longer...
Please take this caution "do not try this at home" seriously - I did have one lucky escape to be able to tell about it - and am not exactly eager to repeat it. It happened more than two decades ago.