Gear
used for subjective Listening:
First
are the front end components.
The
transport is a CEC, TL5100Z belt drive player. It is isolated
from vibrations by resting on a Dodd Audio Levitator (magnetic
levitating platform).
Through
a custom built data link it feeds into a Sonic Craft modded Lite
Audio DAC-60. Standard modifications include upgraded caps to
Black Gates with Gen. 3 polystyrene by-pass caps. Output caps
have been upgraded to Sonicaps by-passed with a Sonicap Platinum.
Further mods include upgrading the RCA's to Vampire Wire's best
solid Copper units, rewiring it with Vampire Wire's continuos
cast Copper wire, and a Bybee slipstream filter on the data input.
Both
units are feed balanced power from a Dodd Audio balanced power
supply. This unit is possibly the best in the industry.
All
outputs are Hubble outlets and have been cryogenic treated.
One
output is specifically for digital components and it is isolated
from the rest of the outputs and receives additional filtering.
Power
cords from the balanced power supply to the front end components
are MPC-12. It uses heat treated, and crygenic treated 12 gauge
Copper conductors.
The
main power cord feeding the Dodd Balance power supply uses a counter
rotating geometry of three runs of 14 gauge per leg. Wire is Vampire
Wire continuos cast Copper. The ground leg runs through the center
in a polyethylene tube. The ends are both Furutech's best and
have been cryo treated as well. It is effectively a 9 gauge cable.
For
the amp comparison, none of the amps were plugged into the balanced
power supply. All were plugged into the wall socket.
All
RCA cables have been custom built using Vampire Wire's continuous
cast Copper in a noise cancelling, low capacitance, counter rotating
Helix geometry. The dual runs of positive and negative have been
wound on a polyethylene core. The ends are Vampire Wire solid
Copper 800 CB with barrels removed.
These
are a very low noise cable with a very high level of upper end
resolution, very balance, and very clean. We make them for our
own internal use only and they are not for sale.
As
for a pre-amp, we were extremely fortunate to have been brought
the brand new, first production version, battery powered tube
pre-amp from Dodd Audio.

This
was the first time for anyone to get to hear a finished production
version of this new pre-amp. It's the best pre-amp that I have
ever heard. The rest of the local guru's and several other industry
professionals seam to agree as well.

This
is a ground breaking new product. It is the first continuous operating
battery powered tube pre-amp.
With
dual sets of 24 volt batteries on hand. It runs exclusively on
only one set by turning the on/off switch to either the left or
right "ON" position. While one set of batteries are
in use and completely disconnected from the smart charger, the
other set is being charged.
Once
battery power levels have dropped to 10% of full capacity, which
takes about 12 hours, then the Green power "on light"
changes from Green to Red. This means its time to go over to the
pre-amp and turn it to the other "ON" position and to
the fresh set of batteries. If you don't switch it after several
minutes then it starts to beep at you like an alarm clock.
Batteries
are rated for 4 to 5 years. There is a periodic rotation procedure
to maximize the life of them.
Circuit
design is very simple and only allows one capacitor in the signal
path. These are the output coupling caps and are Sonicaps by-passed
with Sonicap Platinum's.
It
is completed wired with Continous caste Copper wire.
Outputs
are Cardas except for the CD input and one output that is Vampire
Wire's best solid Copper.
Volume
controller is a motorized Alps Black Beauty.
Tubes
include a pair of 6922's. Others can be used. Pick your flavor.
The
top plate on the chassis and on the remote are Chrome. Side panels
and remote housing come in your choice of finishes. This one was
in Blood wood.
This
thing is dead quite with no noise floor at all. Resolution, detail
level, vocal range, sound stage, imaging, transparency, top to
bottom is the best I have heard.
Not
expensive either. $2,800. full retail. Get in line, but it will
have to be behind me. I am already in line.
Speaker
wire used was high purity Copper with 8 conductors of solid 20
gauge wire for a total of 14 gauge per leg. The conductors are
independently jacketed and spiral wound around a crushed polypropylene
core. One
end had Vampire Wire solid Copper spades. The other end used Vampire
Wire's best banana plugs.
Speakers
used were a new open baffle prototype.
Information
about this speaker can be seen in our forum at the Audio Circle.
http://www.audiocircle.com/circles/viewtopic.php?t=21620
http://www.audiocircle.com/circles/viewtopic.php?t=21999
http://www.audiocircle.com/circles/viewtopic.php?t=24018
These
speakers have very high resolution and a very open sound that
allowed differences to be noticed quickly and easily.
These
speakers also have a powered 12" woofer that is side loaded
and firing to the outside. It was turned off and unplugged during
the comparisons.
I
turned them on briefly near the end but forgot to plug the amps
back in so they were really never turned on during the comparison.
The
ported upper two and lower two woofers can hit -3db down responses
in this room in the upper 40's. Most of the music that we listened
to had little to no information below that point.
The
room was well treated with four large diameter tube traps across
the rear wall. Two are 8' tall and two are 4' tall. The rear wall
was also treated heavy with overlapping 1" thick open cell
foam panels. There were also some panels on the side walls. Windows
are covered in drapes and the floor is covered in a thick shag
carpet. The upper four corners of the room are also treated with
triangular shaped wedges. Room size is 17' wide, 23' deep, and
with 9' ceilings.
The
pre-amp set on an amp stand up front and in clear view. Right
behind it was a foam panel that was 2' tall and 6' wide that totally
hid all the amps that were behind it. Comparisons were completely
bind and the identity of all the amps were only revealed at the
end of the day.
|
GR
Research Inc.
|
910
North Jackson
|
Iowa
Park, TX 76367
|
USA
|
940-592-3400
|