The Purity Reference is a Class A, transformer coupled balanced linestage
and is he result of years of intensive research
directed at attaining the most accurate reproduction of recorded
music. Unique topology and application of the most
advanced technological resources and processes bring the Purity Reference to a threshold of excellence in sound reproduction. To add to it's main features, the
Purity Reference utilizes transformer coupling at both the input
and output. Transformer coupling output results in a low output impedance
making the Purity Reference a versatile unit that is capable of
driving both solid state and vacuum tube amplifiers. Extraordinary transparency of perceived
sound which in turn assures the recreation of a three
dimensional soundstage.
The full function remote
handles mute, balance, source selection and phase inversion. The
volume is handled by a modified shunt type hybrid resistor
design with precise 1dB attenuation steps.
The best sounding volume control next to
autoformers is one that has the least resistance in it's path
and can maintain consistency throughout all frequencies, for
this we chose to use relays.
With
3 sets of balanced inputs, 3 sets of
unbalanced inputs and 2 sets each balanced and unbalanced outputs, connection
possibilities are vast. When an unbalanced input is selected,
the single still passes through the input transformer
maintaining a low output impedance as well as the resolution and
transparency transformer coupling is known for. Absolute phase
and balance control are selected both through the supplied
aluminum remote handset and the front panel controls.
The Reference
also has a passive home theater bypass option. With our
passive setup, there is no need to have the main power of the
unit on when using your home theater preamp/processor saving
further on tube life.
As with all
Purity Series products, the remote circuit has been granted it's
own dedicated power supply including a separate, standalone
power transformer as not to interfere at all with the analog
circuit.
Specifications
- Type :
Class "A", Zero feedback, vacuum tube preamplifier
- Inputs : Unbalanced ×3, Balanced ×3 (unbalanced
inputs transformer coupled)
- All inputs go through a balanced transformer (unbalanced outputs
transformer coupled)
- Outputs : Unbalanced x2/ Balanced x2
- Function : Input selector, Remote Volume control,
Phase Inversion, Balance, Mute, Display on/off
- Circuit gain: 15dB
- Input impedance: 100K
Ω
- Output impedance:
<180
Ω
- Frequency response:
13Hz-35kHz -1dB
- Total harmonic distortion: 0.05% @ 1V output
- AC Power Requirements : 117/220/230/240 volts (factory
wired)
- Fuse: 1 amp fast blow
- Tube lineup : 5814/ECC82(12AU7)×2
- Dimensions : 17" Wide x 15" Deep x 7.5" High
- Net Weight :
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Main Features
- 0 dB
negative feedback
- Pure
tube design (no transistors)
- Passive home theater
bypass - optional
-
shortest possible signal paths
- Very
low output impedance to drive any tube or solid
state power amp
-
Audiophile grade passive components used in all
applications
- Silver TC tube sockets
-
Central one-point earth grounding
- Fully
hand assembled to insure the highest level of
craftsmanship
- Relay
driven, resistor based volume controls - 1 each per
channel / 61 steps @ 1dB ea.
- Relay
based source selector
- No
common ground between any inputs.
- 100%
point to point wired - NO PCB
-
Special ROHS silver solder used for the best
electrical connection
-
Selector switch engages relays located near RCA
jacks to switch all inputs
- 2
12AU7 tubes for stereo line-amplification ( tube
life > 10000 hrs )
-
Supplied with NOS 5814/12AU7 type tubes
- DC
filament supply for signal tubes
-
Balanced output transformers (Custom made for Purity
Audio Design)
-
Balanced input transformers
-
Premium internal signal cable uses ultra pure
copper/Teflon
- The
beautifully crafted 100% acrylic enclosure for
maximum anti-vibration resonance
- Twin
chamber design separated by copper lined aluminum
effectively fights against RFI and EMI.
- RCA
high quality teflon silver input jacks
-
Neutrik/Swiss - XLR chassis connectors
- Remote
Control for Volume, Balance, Mute, Phase Reverse &
display off
- All
front & rear panel descriptions are laser engraved
-
Chassis finish: Black
- Solid
aluminum, laser engraved remote handset
-
Equipped with high quality IEC AC power cord
- Made in USA
- Three years parts and labor warranty. 90 days on
supplied tubes
Power Supply
- A
large high current transformer, RFI/EMI
ultra-shielded (custom-made for Purity Audio Design)
-
Separate power transformer and DC power supply for
remote control system
- Choke
filtered power supply
-
Polypropylene power supply filter capacitors
- StealthTM
(Ultra Fast) diodes used throughout.
Manufacturer Direct Price: $9,995
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