The Harmonia buffer is
the worlds first audiophile grade buffer
stage designed around the 300B DHT tube. This Harmonia
is the first 300B balanced vacuum tube buffer that is designed to a
level that is at home in even the most exotic audio and video systems. It is
designed as a stand-alone tube buffer to bring you closer to
your music by introducing the sonic richness of the 300B tube. We
have all lusted for the 300B sound but found amplifiers using
this tube offered limited dynamic control over many of today's heavy
load speakers. Now you can have the richness of a 300B output
stage of your source component in even
the most powerful of solid state systems.
Found on the balance version is one set XLR balanced and two RCA single
ended outputs as well as one set each for the inputs. All inputs
and outputs, including single ended RCA are transformer coupled. The
Harmonia uses a low output impedance 300B tube stage
feeding high quality balanced transformers that have been custom
made for Purity for this application. The Harmonia will enhance any line level
Harmonia chassis you will find that Purity Audio Design
continues it's tradition of using only the best parts including
first rate input and output balanced transformers, Top grade capacitors
and solid core Copper/Teflon wiring. Like our other
products, you will not find a circuit board in sight other than
the independent dual DC regulated power supplies for the 300B's
heaters. Both the
power supply and analog circuit utilize 100% point to point
The all important circuit contains what we have
found to be the best combination of passive components to bring
the Harmonia alive. High quality DynamiCap capacitors provide
sonic richness as well as maintained extension and detail.
Purity Audio Design products, the Harmonia utilizes a hearty
power supply. Starting with the high current
toroidal transformer to the fully regulated DC filament supplies for
each of the
tube filaments, the Harmonia's power supply is designed to perform.
The main B+, filament supplies are all
each powered by separate, high current transformer taps. The B+
feeding the 300B tubes utilizes a CLC topology with a choke
loaded anode for each 300B tube. What does this mean? Rather than feeding the tube
from a capacitor or resistor, a choke is used in it's place. Purity
Audio Design is known for providing some of the quietest
components available. The Harmonia has an extremely low noise
floor resulting in a jet black background.
The Harmonia finds it's happiness between any source component and preamplifier. Placing the
Harmonia after any high quality CD player, DAC or phono stage, tube or solid
state, brings a sense of 300B richness, smoothness and organic
to any system without
sacrificing any of the quality traits one would come to expect
from a high end audio product.
can transform your dry, fatiguing home theater into a system
your guest will think is driven by SET tubes. One thing the
300B Buffer cannot do is transform inferior components into giant
killers. The 300B buffer can only enhance and bring forth more of
the potential your system has to offer.
As can be seen
in the photos above, the 300B tubes protrude from the
of the unit making
placement more versatile while also allowing for tube rolling
ease. Not to mention what will be considered one of the sexiest
looking components in your system.
For the tube rollers out there, we highly
recommend some experimentation with your favorite 300B tubes.
The Chassis is constructed of
aircraft quality aluminum with CNC machined front and rear panels. Herbies Audio Labs Tenderfeet are located under
the chassis in a 4 point configuration.
The Harmonia is available in either a
fully balanced or all single ended version.
Please note there is no LED power indicator on
the Harmonia buffer.
Harmonia into any system is as easy as installing any source component.
The sonic results
are as follows:
- Restores proper frequency balance through better
impedance matching due to its extremely low output
- Improves tone and weight without adding bloom
- Adds 300B smoothness, richness and
organic qualities to sterile or dry solid state
and tube source components
- Improves dynamics of source components that do not employ
proper impedance matching,
- Enhances detail, resolution and transparency.
- Reduces listener fatigue.
- Enhances the 3D soundstaging of better electronics and recordings.