kevin gilmore
Señor Stax. Señor MAXX.
Can Jam '10 Organizer
- Joined
- Jun 21, 2001
- Posts
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This ought to spark some lively debate...
So i was looking thru a few OTL tube amp schematics and i noticed
that virtually every tube headphone amplifier inverts phase. A quick
glance at a number of solid state units and none of them invert phase.
So that got me to thinking whether or not absolute phase really
makes a difference. Certainly many of the record companies go thru
great effort to maintain correct phase, especially on classical performances
so there must actually be something to this. The first high end grado
headphones had phase switches.
So when comparing a solid state and a tube amp at the same time, some
of the differences you hear may also be phase related.
Amplifiers known to invert phase
Ray Samuels Stealth
Singlepower (all models)
Woo Audio
Eddie Current
Wheatfield HA2
Rudistor RP4
Amplifiers known not to invert phase
Ray Samuels SR-71 (and presumably all his solid state models)
My amplifiers (both tube and solid state)
PPA
melos (balanced input models could actually be wired either way)
cmoy, meta42 et all...
So all you people out there with tube amps and sennheiser headphones,
flip those connectors around and see if you can hear the difference.
So i was looking thru a few OTL tube amp schematics and i noticed
that virtually every tube headphone amplifier inverts phase. A quick
glance at a number of solid state units and none of them invert phase.
So that got me to thinking whether or not absolute phase really
makes a difference. Certainly many of the record companies go thru
great effort to maintain correct phase, especially on classical performances
so there must actually be something to this. The first high end grado
headphones had phase switches.
So when comparing a solid state and a tube amp at the same time, some
of the differences you hear may also be phase related.
Amplifiers known to invert phase
Ray Samuels Stealth
Singlepower (all models)
Woo Audio
Eddie Current
Wheatfield HA2
Rudistor RP4
Amplifiers known not to invert phase
Ray Samuels SR-71 (and presumably all his solid state models)
My amplifiers (both tube and solid state)
PPA
melos (balanced input models could actually be wired either way)
cmoy, meta42 et all...
So all you people out there with tube amps and sennheiser headphones,
flip those connectors around and see if you can hear the difference.