| The Graham Slee Era Gold V and
Elevator EXP Phono Preamplifiers |
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October 2005 |
 
A report from other quarter reveals that sales
of new LPs surpass those of SACD and DVD-A
combined. Add used LP sales to that total and
it becomes clear that the 20-year long attempt
to consign the analog LP to gaslight
obsolescence has failed. Continued improvement
of tonearms, phono cartridges, turntables and
phono stages, along with truly effective
isolation devices, has allowed the LP to
maintain its pre-eminence as the standard by
which music playback is to be judged. My
recent casual (and ongoing) survey of
contemporary developments in CD and SACD
performance left me impressed with the gains
made sonically from even a few years ago, but
even the best of these fall short of the
simple and intense musical involvement
available from the humblest of my LP playback
systems. Since the physical frailties of the
vinyl medium and the perfectionism required to
correctly align and set-up an LP playback
system are so at odds with the push-button
sloth of the digital media, the only
compensation of playing LP’s is their musical
merit.
Over the years I have acquired four turntables
for use in my “reference system.” While this
may seem to be a symptom of terminal pack-rat
syndrome and/or Adrian Monk-Felix Unger
obsession, it allows me, in addition to two
other listening rooms, and a variety of other
electronics, speakers and cables, to get a
reliable cross-section of performance at
various plateaus of resolution when reviewing
audio components. I’ll have to be honest
though: when not listening in the critical
dissecting mode (a large part of which is
consciously focusing on differences rather
than virtues held in common,) the musical
performance of these four turntables is so
artistically convincing that I would be happy
with any one of them should I no longer review
audio products. In addition to the phono
sections built into various full-feature
preamps, I also use three outboard phono
stages that are fairly representative of
choices in the marketplace. The all-tube EAR
834P from the hands of Tim de Paravicini, the
solid-state Tango from the German turntable
firm Acoustic Signature, and Musical
Surroundings’ battery-powered, all discrete,
Class A Phonomenon are reasonably priced, at
$600 to $1200, and thus, from the often
perverse pricing pathology of The High End,
are budget products.
My experiences with the typical High End
"Flavor of the
Month” phono sections over the years have left
me musically unmoved: hyper-real presentations
that tell you everything about the minutiae of
the recording except what the music means
strike me as a waste of time and money. Unlike
most audiophiles and reviewers, I don’t assume
High End pricing ensures higher musical
performance. In fact 25 years of experience
have taught me to assume the opposite: that
High End pre-occupation with extra-musical
sonic minutiae generally results in overall
musical lameness. Fatuously expensive products
have to show me that they can get the basics
of music right before forcing me to be aware
of the length of the guitarist’s fingernails.
The Era Gold V moving-magnet phono
preamplifier and the Elevator EXP moving-coil
preamplifier are priced at $925 and $1025
respectively, and are at the top of UK
manufacturer GLP Audio’s (Graham Slee
Projects) product line. Designer Graham Slee
is a strong advocate of wide bandwidth
designs, so much so that he appears almost as
a voice crying in the wilderness. Considering
that wide bandwidth design as a design fait
accompli is more than 45 years old (the late,
great Stewart Hegeman was its most effective
champion in the USA) and is essentially
Electrical Engineering 101 as far as
esotericism goes, Slee’s seeming proselytism
is more a reflection of the state of the audio
industry than a reflection of any fanaticism
on his part. After all, the CD hype assured us
that the narrow-bandwidth CD standard, which
struggled to just barely respond to 20 kHz,
was “perfect.” Digital audio engineers, crazed
by the success of even narrower bandwidth
compression schemes so popular with the
file-sharing Internet generation, are
frantically struggling to throw away as much
of the music signal as possible. Odd how
simple common sense and basic engineering
principles can appear radical in times when
simple fidelity is an increasingly alien
concept.
Both the Era Gold V and the Elevator EXP are
flat from 5 Hz to 250 kHz. Overall response
extends from D.C to 500,000 Hz. There are no
sub-sonic filters used; nor does either unit
invert phase. Since many US LP albums were
cut-off at 50 Hz to allow tracking on cheesy
turntables with equally cheesy cartridges, and
since most loudspeakers barely respond to 8
kHz in-room at one’s ears, why bother
designing for such extended response? Human
hearing, after all, is commonly assumed to
only span from 20 to 20 kHz, fades in treble
sensitivity with age, and is extremely likely
to become damaged simply by living in our
techno-industrial society. Is wide bandwidth
design an extravagance for audiophiles trying
to please their pet bats?
Theory and experience say otherwise. A basic
electrical engineering maxim states that if
you want to reproduce frequency X correctly,
you have to design a circuit that will do at
least 10X. Imagine the typical mesomorphic
weightlifter lifting a 50 lb. weight. It will
appear to him as light and easy as paper,
while it will cow and bend an anorexic
supermodel whose own weight barely doubles it.
Those unfortunate enough to remember the old
air-cooled VW Bug without rosy nostalgia will
recall that while it could cruise at highway
speed limits, accelerating from 45 mph to the
limit was excrutiating to the point of fear.
Forget about passing anyone. So a simple
conceptualization of the benefits of wide
bandwidth design can be understood as speed
and ease. If the device can reproduce 250,000
vibration cycles per second, doing 20,000
cycles will be a piece of cake. And the
critical bands where the majority of the music
takes place will be like ice cream on the
cake, with chocolate syrup too.
An additional advantage of wide bandwidth is
achieving phase coherence. If you want
coherent phase, then the “to get X, design for
10X” maxim applies. From Graham Slee’s own
specification, the Era V Gold and the Elevator
are phase coherent from 50 Hz up to 25 kHz.
One of the reasons Slee eschews subsonic
filters is that they will screw up phase
response in the bass and above.
Why does one want coherent phase? Simply
substitute the word “time” for “phase.” Since
music is an art formed on the fabric of time,
any warping, folding, or wrinkling of the
curtain of time will ruin both the sound and
the meaning of music. We identify an
instrument and locate its position by
crucially timed sonic events; the most
elementary demands of listening orientation
demand correct phase response.
Auditioning and reviewing the Era V Gold and
the Elevator was one of the more challenging
reviewing experiences I’ve had. While a phono
stage might seem a simple enough device to
suss out, the permutations of playing it with
various turntables arms, cartridges,
interconnects and electronics can quickly
immerse one into a Rashomon nightmare of
slightly varying subjective impressions that
can be maddeningly difficult to unravel. This
has also been my experience with other
excellent phono stages I’ve reviewed in the
past. The Era Gold V and Elevator EXP raised
the task to a new level of difficulty, partly
because their overall excellence made
isolating their contribution from a larger
constellation of sound methodologically
demanding, but also due to their very long
burn-in time. The owner’s manual advises at
least 3 weeks of playing before they reach
optimum. Furthermore they require about a
half-hour playing in each session to come into
song. Designed to be left on permanently
(there are no on/off switches,) disconnecting
them for any length of time will require 72
hours after re-connection to regain normal
operation.
Now, my unfortunate endowment is to have the
patience of a puppy and the curiosity of a
kitty. It was extremely frustrating waiting
for the Slees to burn-in; it was equally
impossible not to listen to them during the
process. My patience was taxed to the breaking
point on numerous occasions. “Are we there
yet?” It took every ounce of methodological
discipline to tough out the break-in process
and to avoid making any conclusions on the
performance of the units during this process.
I’m no stranger to components requiring long
break-in periods. It is one of the more
tedious chores of audio reviewing and the
audio retail trade. When I worked in retail
audio, I often facetiously remarked that it
would make more sense to charge a 20% premium
on demo units, since they saved the impatient
customer the grueling chore of breaking them
in themselves. I know what my next reviewing
tool will be: a cheesy fully automatic direct
drive table with an infinite “Repeat” button.
The Elevator burned-in at just short of 3
weeks; the Era Gold V took 4 weeks. It was 6
weeks before I began to be confident in the
performance of the 2 GLP Audio products and
began giving my perceptions credence. I have
just one word of advice for those auditioning
these products from new. Patience. Patience.
Patience. And then more patience. OK, seven
words.
For technical reasons, Graham Slee breaks
phono reproduction down into separate devices
for moving coil and moving magnet cartridges.
This allows moving magnet devotees to buy a
unit dedicated to their higher output
cartridges. Why pay for moving coil
amplification if you’re not going to use it?
The Era Gold V offers 41.5 dB of gain. Moving
coil owners can add the Elevator EXP to any
moving magnet input phono section as well as
to the Era. Both units feature a non-obtrusive
silver-colored casing about the size of 3
packs of cigarettes. The Elevator features
loading switches (offering 5 different values:
47,000, 5,100, 840, 100, 30, and 23 Ohms) on
the front panel to match cartridge
requirements. Gain is 22.5 dB. Each unit
receives its power from its own dedicated
remote PSU-I power supply; the Era can be
purchased with a lower cost ‘wallwart’ PS and
then upgraded by purchasing the PSU-1. Graham
Slee advises not placing the PSU-1 on the same
shelf as the phono section or the turntable.
Graham Slee also recommends not connecting the
power supply AC cords to any form of line
conditioner. Interconnects should be
low-capacitance types; GLP Audio’s website
even offers instructions for a do-it-yourself
interconnect.
Given
its non-intimidating physical presence and
non-terrifying price, the Era Gold V’s
high-strung thoroughbred nature is somewhat of
a surprise. Here is a true high-resolution
purist device that will clearly reveal
limitations in partnering gear; slight
misadjustments in tonearm set-up will be
obvious; LP condition, pressing quality and
recording engineer competence are laid bare.
While an elementary school teacher might
remark, “Does not play well with others,” the
truth is that the Era demands a peer group
with commensurate abilities to its own. One
wouldn’t place a Mozart-like child prodigy
into a playgroup of musical dullards. The
Era’s demands are simple: echoing Oscar
Wilde’s quip, it is always satisfied with the
best. Consequently there are huge musical and
sonic rewards to be gained by the laborious
matching of ancillaries to allow the Era to
fully reveal its potential.
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