the STAX Transformer
by Andrea Ciuffoli - 21 oct. 2001
contact me for any problem or question: firstname.lastname@example.org
The my idea was to create a very simple driver for the Stax headphones
that anyone can make with little DIY experience and that use the normal
loudspeakers amplifier of any type (vacuum tubes or solid state).
The unique requirement of the amplifier is a minimun output voltage
of 10Vrms. Any solid state amp. with a power more than 13W has an output
voltage greater than 10V because P = V*V/I => 10V * 10V /8ohm = 12.5W
and all home amps. give the nominal power on 8ohm load.
In case you want to use a vacuum tube amplifier with a power lower
thatn 13W you can use this project only if your amp. has an output of 16ohm.
All the audio transformers used in this project are Lundahl
products and the disrtibutor list is available here
2 x LL1630/PP
Lundahl line output transformer
2 x LL1651
Lundahl power supply
(any other transformer with 500V 100mA min can be used instead of this)
STAX Electrostatic Earspeakers
via degli Zingari 50
but please send parcels to:
via Giacomo Trevis 44