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LOC
(Library of Congress)
Professional Phonographic
Preamplifier with RIAA +
Archival Compensation &
Corrective EQ
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True differentially balanced phonographic preamplifier
topology
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User-definable (universal) compensation and loading
parameters
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Sets new precedent in phonographic sonic invisibility
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Ultra-premium transformerless componentry throughout
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Gold relays, connectors & switches. Hand machined
aluminum cosmetics
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Extremely low noise (-125 db flat). Pure class-a
discrete j-FET filters
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Effortless, lifelike musical performance at all dynamic
levels
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Constructed for life, cosmetically appealing
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Lundahl MC transformer option included at no additional
charge (bypassable)
The LOC Analog Legacy
phonograph playback system
is a hand-crafted collection
of Millennia's essential,
100% DC coupled preamplifier
and equalizer circuitry
tailored specifically for
the needs of archiving and
mastering professionals.
Audiophiles requiring a
sonically uncompromised
phono path will also
benefit. The LOC was
originally specified under
contract for the U.S.
Government (Library of
Congress, Culpeper VA).
Since then, the LOC has been
acquired by archiving and
mastering labs throughout
the world.
The LOC offers a selectable
mono or stereo playback
environment which can be
used with any modern or
legacy phonograph cartridge.
Any known style of record
pressing can be compensated
perfectly with the LOC,
including vertical groove
processes. When the LOC does
not offer a precise preset
compensation point, a user
may define virtually any
compensation via passive
plug-in components.
LOC employs a
discrete-hybrid design
topology from input to
output, utilizing both
discrete bipolar and
field-effect transistors
where they are optimally
applied for Millennia's
hallmark sonic
invisibility. The LOC
accepts balanced line-level
or phono-level input via
gold XLR connectors.
Unbalanced RCA inputs are
also provided. Ten discrete
outputs are provided on both
gold XLR and RCA phono
connectors. Mains powering
is worldwide (100V-240V).
The Legacy offers forty-nine
combinations of preset
compensation curves for
precise performance with all
formats, including 33-1/3
(RIAA), 45, and a vast array
of 78 RPM EQ formats.
Legacy’s phono compensation
network has only one active
amplifier stage in the audio
signal path. Compare this
with textbook phono designs
employing anywhere from two
to five compensation path
amplifiers. Fewer amplifier
stages means greater sonic
integrity and heightened
musical reality. This single
all discrete Class-A stage
is optimized as input
buffer, compensation
amplifier, and output
driver. It's something you
must hear to appreciate.
Legacy’s phonograph
preamplifier design is based
upon Millennia’s acclaimed
HV-3 mic preamp topology, a
world standard in classical
and critical acoustic music
production. Utilizing a
discrete-hybrid, fully
differential balanced design
— phono signals remain
differentially balanced
throughout the entire
preamplifier path. The LOC
features 36 discrete gain
steps of 1.5 dB per step to
60 dB (up to 90 dB upon
request), user-selectable
(unlimited) capacitive and
resistive loading, mono and
polarity select switching
for vertically grooved
pressings, stereo gain
matching to .08 dB, and an
entirely transformerless
audio signal path (Lundahl
MC transformer option
included at no additional
charge).
Rounding out the LOC feature
set is a collection of four
surgical filters which will
isolate and correct problem
areas associated with groove
degradation and surface
noise. Legacy filters offer
both shelving and peaking
response with a number of
user-selectable frequencies
via Grayhill military grade
gold contact rotary
switches. If not required,
all filter sections can be
removed entirely from
Legacy’s signal path for
increased sonic integrity.
LOC Legacy’s pure Class A
amplifiers are carefully
designed around the finest
grades of passive components
from Vishay, Roederstein
MELF, Wima, Toroid Tech, and
German ITT. Key
electro-mechanical design
features include a 16 gauge
cold-rolled plated steel
chassis (26 pounds), 3/8”
thick radiused aluminum face
panel which is deeply
polished in a “piano
lacquer” black anodize
finish, hand machined and
polished black aluminum
knurl knobs, and custom
molded illuminated
switches.
One listening session with
the LOC will immediately
confirm that Millennia has
once again set precedence in
musical realism and sonic
transparency.
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