- Phono Preamp
Gregoire and Associates LLC
FOR THE DISCRIMINATING AUDIO
only, full-line, stocking dealer of
London Decca phono cartridges,
London Decca Jubilee, London Decca Super Gold,
London Decca Gold and London Decca Maroon.
Manufacturer of Ikonoklast2DX4 speakers.
Manufacturer of Ikonoklast3 speakers.
Manufacturer of Ikonoklast5 speakers.
Manufacturer of Ikonoklast7 speakers.
Micro transmission line speaker systems.
Sony SACD Modifications.
Stereo repair and stereo modifications.
State GmbH svp1 Preamplifier
- Now in Stock for Immediate Delivery, $6300 -
This remarkable unit combines state-of-the-art
reproduction with the best line stage south of $20,000.
thoughts about his favorite new preamp:
Although the svp1 has the appearance of elegant
simplicity, with only an input selector and volume knob
on the front panel, it actually has more (hidden) useful
controls and facilities than many competitive products. A
glance at the rear panel reveals 18 sturdy I/O connectors
that help achieve outstanding flexibility of operation
and ease of optimum setup.
Four easily accessible, removable jumpers may be safely
accessed from a cutout in the bottom panel. These allow
the phono stage gain to be matched to virtually any
cartridge "in the known world." Even the line
stage gain can be adjusted, simply by changing the value
a one resistor per channel (This work is normally
performed by a skilled technician.). Extra phono sockets
on the rear panel allow easy changes to cartridge
loading, simply by changing plugs. A superlative tape-out
signal is provided by a DIRECT COUPLED FET buffer.- No
coupling capacitor in the path to the tape. This is not
quite as good as the main output, but compared to most,
it is stellar.
But to me, the convenience and flexibility are only
ancillary benefits. My primary interest is natural, super
realistic music, voice and sound reproduction. Never have
I had more realistic and involving musical experiences
from recorded music. Both svp1s that Ive
heard eclipse even my extravagant homebrew Vacuum State
RTP4 balanced phono stage.
Why does it sound better than other preamps? Allen Wright
has applied all of his "silver bullets" to this
design, and I am pleased to say that the beautiful music
it reproduces has convinced me they are all
percolatin together in the intended manner.
View the svp1 user manual, including color photos by
We usually have an svp1 available to demonstrate in the
San Francisco Bay Area, and nearby communities. Phone me
about this, Warren, 1-800-634-0094 (Best time after
1:30PM until ridiculously late).
For the technically minded, the "silver
bullets" we refer to are, in part, as follows:
Six 6922 dual triode vacuum tubes plus one FET per
channel in the phono stage, used as the lower half of a
cascode (the upper half ½-6922). This provides moving
coil gain, without the need for a sound-degrading step up
transformer. Transistor sonic signature is not heard in
this design, with the FET only as the lower half of a
cascode. The tube upper half dominates, sonically.
Top quality components used throughout
Superior high speed analog IC-controlled SHUNT regulation
of B+ supply voltage. Why shunt? Unlike the usual series
regulators, shunt regulators ABSORB CURRENT reflected
from the load (preamp tubes). Under dynamic (musical)
conditions, any preamp reflects current to the power
supply. If a typical series regulator is used, this
reflected current keeps bouncing around, potentially
causing sonic nasties. But in the svp1, the shunt
regulator transistor just swallows the reflected current
before it bounces even once.
Critical stages are biased by constant current source.
This is the most accurate, stable and sonically benign
method, that requires more complexity and a higher parts
Line stage EXTRA dual triode TUBE serves as both current
source for bias, and also voltage regulator for the
cathode follower. This is a biggie that provides a huge
improvement to the potentially troublesome cathode
follower, and renders it sonically benign, for the first
time. Thats why this line stage doesnt change
the sound, as the usual conventional designs do.
Extra large VA capacity power transformer, providing
superior voltage regulation, due to inherent inductive
Printed circuit board has most components mounted on the
TRACE side. This avoids signal losses caused by the
current carrying wire passing through the lossy board.
This technique enables Vacuum State to closely approach
the sound quality of more costly point to point wiring,
at a sharply reduced cost.
Allen Wright has revealed many of his key design ideas in
his "PREAMP COOKBOOK." Available at times on
the VacuumState.com website.
Click below to view the svp1 photo pages on the
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Specifications, prices and availability
subject to change without notice.
Copyright 2007 Warren Gregoire and Associates LLC
All Rights Reserved.