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Sound of the Wood™, Advent 300, by David Plummer - Fully Modified (*$599.00)
*Price increase to
$679.00 after April 1st 2008
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The Advent 300
(Sound of the Wood™ series II) are vintage units with totally revamped
power supplies, revisions and upgraded components to exceed the
original specifications. The phono stage in the original Advent 300’s
are very good, with the listed modifications these units are “jaw
dropping”. If you are thinking of spending a thousand or more on a
great pre-amp or phono-stage, do yourself a favor and try one of these
units. You won’t be disappointed!
See up-grades and
bio below.
Advent
300 Tuner/Pre-Amp
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Gold plated
RCA phono plugs, capacitance and cartridge variable resistance loading for
those critical phono cartridge needs.
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IEC
Power Socket with noise filter and fuse holder.
Note 75 ohm Antenna F-Connector.
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Black Gate
caps in critical phono and line pre-amp stage
brings stunning sound depth and transparency.
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Phono stage:
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Black Gate
caps in select positions in the phono and line preamp sections.
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Switchable
capacitance loading for phono added - 2-position switch, pair of
100pf polystyrene caps.
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Pot added for
variable resistance loading for phono along with 2 metal resistors
to fix minimum loading at 100 ohms.
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Hardwired
tone control bypass.
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Phono RCA jacks
replaced with gold plated, Teflon dielectric ones. Solid core silver
wire used to connect jacks to PCB on signal path.
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Pre-amp out and
power amp in RCA jacks replaced with gold plated, Teflon dielectric
ones. Solid core silver wire used to connect jacks to PCB on signal
path.
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Phono RCA jacks
replaced with gold plated, Teflon
dielectric ones. Solid core silver wire used to connect jacks to PCB
on signal path.
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Pre-amp out and
power amp in RCA jacks replaced with gold plated, Teflon dielectric
ones. Solid core silver wire used to connect jacks to PCB on signal
path.
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Tuners
& Power Supplies: |
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Power amp bias
setting and tuner alignment.
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IEC power socket
with noise filter, and fuse holder added.
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Antenna inputs
replaced with a 75 ohm F-connector and new wire run to tuner input.
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New
Murata IF filters, minimum group delay type, 230 kHz width, for
increased selectivity with low distortion.
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Power Supply caps
upgraded
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David
Plummer:
David Plummer has
been the proprietor of Objective Sound (formerly Audio Specialty Co.)
for the last dozen years, performing rebuilds of vintage stereo gear
including tuner alignments as well as designing new audio products.
Objective Sound focuses on modifications and designs that exhibit
measurable improvements to the classic audio electronic parameters as
well as bringing refinements to the subjective audio experience of
listeners. David is a degreed engineer with over 25 years of
commercial experience in the R&D of new hardware, software, and
systems products for both the digital and analog domains. He is a
member of the Institute of Electrical and Electronics Engineers. David
may be reached at dlp@ieee.org or (603) 881-5775 in New Hampshire
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A recent Advent 300 advertisement:
“The Advent 300 was one of Tomlinson Holman's greatest feats. He
created the first truly "musical" phono stage (at least in the
transistor era) and included this in a moderately priced "Black Box".
Henry Kloss oversaw this project. In the Absolute Sound, Pearson
described this (the phono stage) as nothing short of incredible,
especially when compared to Pre-Amps costing under $1000.00. In the
70’s and on Pearson’s advice many "vinyl cultist" bypassed the tone
controls to gain even more transparency. These units have the "tone
defeat" modification, and is stunning in its depth and transparency.”
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