“Your speakers and electronics will determine how your music system will look
Your cables will determine how well it will reproduce music”.
The SAMBA story
A history of the 20 year cable design journey that has produced
Back Rhodium SAMBA Loudspeaker Cable
“. . .overall a true heavyweight in the speaker cable world.”
DAVID BROOK, MCRU
By Graham Nalty of Black Rhodium
1
Index
The start, using PTFE insulation
Why silicone rubber?
S300 Successful application of Silicone Rubber insulation
BiWire cables are also popular
S300 becomes Salsa
Testing the sound of reversed conductors
A surprising difference in sound quality
Post curing
Deep Cryogenic Treatment
A small change to the overall sound of the system - A massive change in the enjoyment of music
DCT expands Black Rhodium’s range
DCT++ Further sound quality Improvements
The Benefits of DCT demonstrated in public
Ninja, an important step on the road towards Samba
ACT 1 and ACT 2
TWIST
The Proximity Effect and its influence on sound quality
Transient Phase Distortion
And TWIRL
And now SAMBA
The Sound of SAMBA
Next Stop for SAMBA – DCT and other new developments
With the very best Speaker Connectors
SAMBA specifications, and their features and benefits
The Sound of SAMBA
Next Stop for SAMBA – DCT and other new developments
2
The Samba story
Black Rhodium Samba follows a long tradition of development of high quality audio cables following on
from research and listening tests carried out by Black Rhodium people over many years.
Starting using PTFE insulation
The story starts in the early 1990. I was very heavily involved manufacturing amplifiers. I wanted to use
the best sounding wires for the internal wiring of the amplifiers. At that time I was not expecting to buy
in the quantities that wire and cable manufacturers would expect and so I examined the catalogues of
various electronics distribution companies to seek out wires of the best specification. A few distributors
offered wires in the higher grade materials for use in high reliability military or close tolerance
instrumentation electronics. One electronics distributor offered a range of silver plated copper wires
insulated in pink PTFE. For speaker cables, and also for re-wiring the internal; wires in loudspeakers, I
bought some lengths of the largest size, 37 cores of 0.4mm diameter silver plated copper wire
(approximately 4.5 sq mm).
The same distributor also sold a thin coaxial cable with a silver plated copper conductor, PTFE insulation
and a silver plated copper braid. This was used as an interconnect cable with great success. When I later
found a manufacturer to make cables to my own specification, I used this design, but with a thicker PVC
outer sheath to be more acceptable to consumers. This cable, known as ‘Silver Pink’ because it used
silver plated conductors which were not very common then and had a pink colour body, was very highly
praised by Hi-Fi Choice as the best cable in a group of ten cables even though it was the least expensive.
A reprint of the review appears in Appendix 1.
I used the 37 core wires for upgrading the wires in loudspeaker, being careful to mark the positive and
negative wires. Looking back, I remember that the re-wiring of customers loudspeakers, coupled with
the replacement of electrolytic capacitors for lower loss plastic film types, produced many very
satisfying speaker upgrades, though I cannot remember selling large quantities as speaker cable initially.
A visit to an electronics exhibition followed with an order to a British cable manufacturer for a 3 core
power cable using silver plated conductors and PTFE insulation. This cable, later called First Mains, was
the first mains cable specially manufactured for high quality audio using high grade materials with
conductors in the correct mains cables colours. This was not the first audio mains cable and others
before me had produced mains cables using the conductors from high quality speaker cables. First
Mains was a big hit with HiFi News magazine when Martin Colloms reported in the July 1990 issue on
the improvement that First Mains made on a Mission Cyrus amplifier.
Speaker cables were hand assembled from PTFE insulated wires, the same company manufactured wires
in 19 x 0.45mm silver plated copper and insulated in PTFE in both black and red colours. These were
placed together in an expandable braid to make them suitable for connecting to loudspeakers.
3
Around 1996-7 I investigated the potential of using silicone rubber insulation. Like PTFE. Silicone rubber
has a very low dielectric loss and this means that distortion to the music from dielectric absorption will
be very low. Early testing of silicone rubber insulated cables against PVC insulated cables showed that
silicone rubber enabled the leading edges and natural decays in music to sound more natural and
authentic. Later tests on a like-for-like comparison between PTFE and silicone rubber insulation in a high
end interconnect showed that silicone rubber insulation offered a more natural and less ’hard’
presentation of music than PTFE, but only marginally.
Why silicone rubber?
There is perhaps a very obvious reason why silicone rubber insulated cables seem smoother and have a
more natural sound and PTFE has a more brittle and hard sound. As we have found recently cables with
thicker insulation sound clearer because the magnetic field associated with the current in one conductor
affects the current flow in the other conductor. As the magnetic field decreases with distance away from
the current carrying conductor the distortion effect created by the magnetic fields will be less.
The insulation thickness for a 3 sq mm wire insulated in PTFE is typically 0.4mm and 0.8mm for the same
wire insulated in silicone rubber. So this, partly at least, explains the differences between silicone
rubber and PTFE insulation.
S300 Successful application of Silicone Rubber insulation
The ‘AERO SPACE TECHNOLOGY’ Silver Aero S300 loudspeaker cable was
made from 19 x 0.45mm silver plated copper wire insulated in silicone
rubber and the two cores were held in a silicone rubber outer sheath of
about 9mm diameter.
The name ‘AERO SPACE TECHNOLOGY’ was chosen to highlight the cable
because the factory that made the cable advertised themselves as being
the ‘aerospace division’ of the electronics company that owned the
factory. Later the company was bought by the management and still
makes cables for Black Rhodium. The cable was very successful
commercially and won the coveted 5 star award from What HiFi?.
What Hi-Fi? October 1997
BiWire cables are also popular
To accompany the Silver Aero S300, we added the Silver Aero S300x2, a 4 core BiWire cable made from
4 separate cores of 19 x 0.45mm silver plated copper wire and covered in a silicone rubber outer sheath.
Silver Aero S300 sand S300x2 stayed until 2002 when the Black Rhodium brand was created .
The sound of reversed conductors
4
I was alerted to the potential of reverse wiring of the conductors in audio cables by Stuart Wennen, a
reviewer for Hi-fi World magazine with considerable experience of installing sound systems in pubs and
clubs. The theory was that the music sounded better if the current that produces the sound in the
speakers travelled in the same direction as the direction in which the wire was originally manufactured..
On Stuart’s advice, I tested a number of cables and was convinced of the benefits I heard as clearer
sound quality. I decided to include the reversal process in the manufacture of all Black Rhodium cables
where it was possible, being fully aware of the extra complexity in the manufacturing processes that this
required.
S300 becomes Salsa
The S300 cable not only acquired the new name, Salsa, but was also upgraded in sound quality. This was
by a very simple measure of enabling the direction in which the wire was drawn in manufacture to
follow the same direction as the current flowing between the amplifier and loudspeakers. To achieve
this reliably is not as easy as may be first thought. The first consideration is that the whole batch of cable
to be manufactured has to be taken from the same continuous length of wire supplied to the
manufacturer. If the wire for positive and negative conductors comes from different reels, there is no
easy way to find out whether one reel of wire has been reversed before delivery to the cable
manufacturer or whether the two reels were actually made from the same ingots.
After selecting the reel of bare wire from which the cable is to be made, the manufacturer produces two
similar lengths of insulated wire in red and black insulation. These are printed with a direction arrow to
show absolute direction in relation to the wire direction on the supply reel. All the lengths of insulated
wire of one colour are rewound on to another cable reel to reverse their direction. A red wire and a
black wire, with direction arrows showing in opposite directions, are then fed into the manufacturing
plant for the white outer sheath of the cable to be applied. This is then overprinted with the name Salsa
and the cable can be left to cool.
Salsa loudspeaker cable showing direction arrows
Testing the sound of reversed conductors
When the reversal process had been incorporated into the cable manufacturing processes I tested a pair
of speaker cables. I first connected the cables in the usual way with the writing on the cables reading
from amplifier to loudspeaker. Many hi-fi experts advise that cables should always be connected with
the signal following the manufacturer’s direction arrows on the cable. Others recommend that new
cables should be tested in both directions by listening and the cables should then ‘burnt-in’ by keeping
the cables connected in the direction that gave the best sound. With this in mind I reversed the direction
of both cables. I could certainly tell a small difference, but I have no recollection which I thought to be
better. The difference in sound quality between the cables in both positions was not enough to justify
the extra expense of further manufacturing quality control.
5
A surprising difference in sound quality
I then tested the same cable with one channel reversed. The sound lost its focus and the quiet
background between the instruments was much less apparent. It certainly more than justified the extra
manufacturing processes that we used to ensure full control the ‘drawn direction ‘of each wire in our
cables.
This does leave two questions unanswered.
First – Let us consider two pairs of speaker cables, of which one pair is a standard cable with positive
and negative conductors in the same direction, and the other is a Black Rhodium cable with both
positive and negative wires in opposite directions. The question is - will there be a bigger difference in
sound quality when both channels of one pair are reversed than with the other pair?
Secondly – If only one cable of each pair is reversed will the sound quality difference that is heard be
greater with one of these pairs of speaker cables than the other?
My intuitive thoughts are that with a standard cable (with both positive and negative wires drawn in the
same direction) there will be a greater difference when both cables are reversed and a smaller
difference when only cable in the pair is reversed compared to the Black Rhodium cable (with one wire
only reversed in direction).
Post Curing
At one time Black Rhodium also arranged for the cable to receive a further treatment after manufacture
to improve its sound quality. This process is called ‘post curing’ and is used for cables that are to be used
in underground railways and other places where the fumes from a burning cable can cause toxic injury
due to gas inhalation. Silicone rubber cables do not burn easily and do not exhibit as much toxic fumes
as with other insulating materials and the ‘post-curing’ further reduces the toxic effect of burning.
Tests were carried out by Black Rhodium that showed that ‘post-curing’ made a small but noticeable
improvement to sound quality. This process ceased when a re-evaluation showed that the improvement
in sound was no longer justified by the additional cost of the ‘post curing’ the cable
Deep Cryogenic Treatment
Shortly after introducing the Black Rhodium brand, in the autumn of 2003 we were offered the
opportunity to test the benefits of cryogenic processing of cables as a means of improving the sound
quality. In this process the cables are gradually reduced in temperature to -190oC, held at that
temperature for a period of time and then taken back slowly to room temperature.
“A small change to the overall sound of the system
A massive change in the enjoyment of music”
6
We applied the DCT process to a selection of cables. We listened to compare the effect of the Deep
Cryogenic Treatment process the effect of the DCT process on the cables and found the DCT processed
cables to improve the sound in aspects of the music. The changes may at first seem subtle, but when
you listen to music you know, you begin to appreciate the more precise imaging, improved resolution,
enhanced articulation of voices and instruments and a quieter background, together with superior
timing of the rhythms in the music.
DCT expands Black Rhodium’s range
The commercial benefit of using the DCT process was that it enabled Black Rhodium to expand the cable
range further. Applying the DCT process to Salsa, and covering the cable in a black expandable braid to
distinguish the DCT cable visually from the non-DCT cable, converted it into the Gladiator. Applying the
DCT process to the Salsa BiWire produced the Emperor (2 core) and Samurai (BiWire) cables.
DCT++ Further sound quality Improvements
Further improvements were made to the DCT versions of Salsa and Salsa BiWire when the cryogenic
suppliers offered Black Rhodium a more advanced process which was called DCT++. In this process, the
cable not only undergoes a standard DCT process, but also a process that includes raising the
temperature of the cable above room temperature. This process can only be carried out on cables with
high temperature insulation and the silicone rubber, unlike other cable insulations, handles the process
without problems. The sound quality of DCT++ treated cable is considered by Black Rhodium to be very
much improved over the sound quality of a standard DCT treated cable.
The Benefits of DCT demonstrated in public
In autumn 2004, we carried out listening tests at two hi-fi shows in London and Manchester to
demonstrate the benefits that Deep Cryogenic Treatment delivered in sound quality. Thanks to the
support of Arcam and B&W who kindly loaned electronics and loudspeakers, we set up two identical
sound systems in which the only difference was that one system used our standard Black Rhodium
cables and the second system used exactly the same cables, but all the cables had been DCT processed.
So that people would be more able to spot the benefits of DCT in a way more appropriate to applying
the DCT process to all their cables in their music system we used five different cable in each system;
The stereo interconnect between CD player and amplifier
The speaker cables from the amplifier to the speakers
The mains cable supplying the CD player
The mains cable supplying the amplifier
The 4 way cable extension supplying both mains cables
In our tests we asked everyone to write down which system gave the best sounds and to describe the
improvement made by the better system.
Over 89% of the 100 plus visitors were not only able to say that the DCT cables sounded better, but
could describe in words. Here is a small selection of the responses we received.
7
“I thought that the DCT cables sounded more dynamic and brighter. The other cables sounded more mellow and rounded.
Whilst the DCT cables were more dynamic and detailed, I thought that both systems sounded good.” R. N. of Leatherhead
“I have been involved with HIFI as a user-and later a maker- for almost 50 years. I have to say that the all round
improvement in sound quality when the cryogenically treated cables were in use was dramatic. If I had not heard it I would
not have believed it.”
M. A. of Rushden
“Definite improvement in detail and openness far greater clarity over standard cable.”
B. B. of Northallerton
“At moderate listening levels the DCT cables made a noticeable difference in the sound stage which opens up and becomes
more dynamic.”
C. S. of London
“The difference was as clear as night and day. Overall clearer, less distortion and a more musical sound.”
B. C. of Brogsborough
The tests showed quite conclusively that Deep Cryogenic Treatment significantly improved sound quality
Ninja, an important step on the road towards Samba
With Cryogenically processed versions of our best cables, we appeared to have reached the limit of
development without going on to much more expensive conductors such as pure silver. What we did
next was critical to reaching the path which today has taken us to Samba. We decided in January 2005
that the only way up was to use all 4 conductors on the DCT version of Salsa BiWire as a single very large
(12 sq mm) wire. To keep the cable manageable, we twisted the two thick cables together and bound
them in an expandable braid. The resulting cable we called Ninja.
The first time I played Ninja in a system, I noticed that it sounded much cleaner, smoother and more
natural than any other speaker cable had been in that system. Since then, Ninja has become a very
successful cable for Black Rhodium. When reviewed in Hi-Fi World in July 2006, the verdict was that “It is
stunningly fast, incisive and transparent – so clear it’s almost frightening – and boasts a massively well
articulated bass performance with firecracker dynamics.”
Over the years various comments from customers pointed us towards the idea that Ninja sounded so
good because the positive and negative conductors were physically further from each other than in any
of our other speaker cables. When we increased the insulation thickness of a mains power cable to
ensure we were exceeding safety regulations, an overseas distributor told us that we had improved its
sound.
8
Ninja loudspeaker cable
ACT 1 and ACT 2
In September 2011 we decided that we wanted the quality that we very much admired in Ninja to be
available to customers who had much less ambitious budgets for their speaker cables. We made up
samples using all four conductors of other BiWire cables as each conductor of the speaker cable in the
same way we assembled Ninja and these became ACT 1 and ACT 2. Performance was far better than we
expected. Even ACT 1, made from our basic tin plated copper was giving superior results to some
cryogenically processed silver plated cables, breaking our long held belief that the best materials are
essential in achieving high quality sound.
ACT 1 loudspeaker cable
ACT 2 loudspeaker cable
TWIST
With suppliers’ prices rising following world wide price increases in materials, we were faced with the
imperative of finding ways to manufacture better quality cables at lower manufacturing cost. We found
from our suppliers that we could reduce our manufacturing costs of our lower priced cables if we
omitted the outer sheath covering the conductor wires. We used that information to develop a cable
based as closely to Ninja as possible but at the lowest possible cost. We designed Twist so that its
insulation thickness was twice that of the Rumba cable it replaced.
Rumba speaker cable (left) with insulation thickness of 0.6mm alongside Black Rhodium Twist
which has a 1.2mm insulation thickness. Both cables have the same 24 x 0.2mm diameter conductors
Twist has been an immediate success with top reviews in Hi-Fi Choice and Hi-Fi World magazines.
“A well thought out cable that delivers a touch of
class to budget systems at a very reasonable
price"
"A classy, high quality cable, providing top quality
sound reproduction over all formats and sources."
Twist has been awarded the HIFI WORLD best cable award for 2012.
9
TWIST loudspeaker cable
The Proximity Effect and its influence on sound quality
Basic Electrical theory tells us that when two parallel wires are placed close to each other, the current
flowing in one wire will affect the current carrying performance of the other. This is known as the
‘Proximity Effect’.
In most loudspeaker cables, the positive and negative wires are often spaced closely together, the
distance between the conductors being no more than twice the thickness of the inner insulating
material.
If both wires are carrying the same current, the current distribution in either wire will be at a higher
level at the side furthest away from the other wire.
If, as is the case in driving loudspeakers, the currents in both wires are in opposite phase, then the
current distribution in both wires will be higher at the sides closest to the other wire.
The effect of the altered current distribution on both wires is the increase the electrical resistance of the
wires. Additionally, the increase in electrical resistance will be greater at higher frequencies. This will
potentially alter the phase response of the loudspeakers.
AC Current distribution when the current is flowing in
opposite directions in both conductors.
Current distribution is highest closest to the other conductor
Most loudspeakers are complex reactive loads. The voltage in either wire at any time is not in phase
with the current.
Thus the magnetic field that is altering the resistance of the wires is not in phase with the voltage in the
wires at any time.
Hence the current in one wire is modulating the output of the other wire in a way that has no
relationship (at any point in time) with the voltage in the wire. Because of the phase difference the small
change of the voltage to the loudspeakers due to the ‘proximity Effect’ is heard as random noise
unrelated to the signal. This form of distortion is highly audible and can be described as:
10
Transient Phase Distortion
‘Transient Phase Distortion’ is caused by the magnetic fields generated by the current carried along
each wire. The magnetic field around each wire decreases exponentially with distance from the wire.
‘Transient Phase Distortion’ can therefore be reduced by increasing the distance between conductors. In
practical terms this can be done either by increasing the diameter of the insulation or placing the
conductors a fixed distance apart by means of a webbed construction. In Black Rhodium cables, the
‘Transient Phase Distortion’ is lowered by using thicker insulation and twisting the cable to gain lower
inductance and pick up of RFI (radio frequency interference) that can distort the music signal audibly by
modulation the interference voltages with the music signal voltages.
And TWIRL
Twirl was designed as an upgraded version of Twist that could deliver better sound quality on account of
a greater distance between the conductor wires (around 1.5mm) and a larger cross section of wire (2.5
sq mm).
TWIRL loudspeaker cable
And now SAMBA
Samba is a further upgrade of Twist beyond that achieved with Twirl. The conductor wire is silver plated
copper, the conductor size is increased to 3 sq mm and the insulation thickness is increased to 2mm. Full
specifications are given below with details of each part of the specification benefits the sound quality.
With the very best Speaker Connectors
We had two very important requirements for the connectors that we use with Samba. The first is that
the connectors should give the best possible sound quality because the Samba connectors will be
competing with the best connectors that other cable companies are using on their speaker cables. The
second is that the connectors should look good and should stimulate sales even before the cable can be
auditioned.
To test the connectors, we assembled several pairs of speaker cables each with different types of
speaker plugs taken from our stock. We chose TWIRL for the test cable for a number of reasons. Firstly it
is an extremely good cable and therefore its imperfections were less likely to favour one type of
connector over another inaccurately. Secondly Twirl lies in the middle of our range in terms of physical
size and this makes it easier to fit connectors designed for large cables and also connectors designed for
small cables. Our tests revealed several important findings.
Rhodium plated connectors gave better sound quality than gold plated connectors.
Locking connectors gave better sound quality than push in plugs.
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Z plugs gave very good sound, again better than push in plugs
Plugs with moving parts did not give good sound quality
Even the way the cable is connected to the plug affects sound quality.
Using connectors fitted with two fixing screws, the sound was slightly better when the second
screw was used to grip the insulation and only one screw had electrical contact with the cable.
And the best plug overall in that test was the plug that we now use with Samba. This plug was originally
purchased to be used with our most expensive speaker cable, Ninja, so it was a leap of faith to use a
very expensive plug with a much less expensive cable. When expensive plugs are used with speaker
cables, there is always the concern that a competitor with less expensive plugs will be more favourably
received in a magazine review because it offers better value for money. However these plug not only
look good but they sound good and I am confident they will add to the overall value of the terminated
Samba.
A high quality cable that has beautiful connectors will attract customers to the cable. We are very
fortunate that the connector that we use for Samba not only sounds very good but looks superb. It is
also a very good fit with Samba.
Samba cable is cut through part of the insulation only
Following on from our connector research, we use the screw at the cable end of the plug to secure the
insulated part of the cable, without making any electrical contact. We do not need to tighten the screw
fully because the silicone compresses easily. Samba cable is prepared for connection by cutting a notch
into the insulation as shown in the picture above. The screw nearest the mating end screws directly on
to the cable using the insulation below the wire. In this way there is only a single contact point between
the cable and connector. Ideally we would prefer the screw to press on to the insulation and the wire to
make contact with the shell of the plug giving a more direct contact path by omitting the screw, but
overall the present method seems to be more secure.
Samba fitted with Rhodium plated locking 4mm plugs
12
‘Simple design, elegant construction, and does not miss a beat.’
Samba specifications, and their features and benefits
Specifications
Features
Benefits
Silver plated copper
Plated for superior signal
conduction
Clearer mid and high
frequencies
3 sq mm conductor
Low impedance connection
between amplifier and speakers
Clearer and tighter low
frequency notes
Better focussed stereo imaging
Suitable for long cable runs
Silicone rubber insulation of low
dielectric loss 0.0003
Energy from the music signal can
be stored in the insulation and
released at a later point in time.
The released energy is now out of
phase with the music signal and
adds a time smeared noise that is
very audible as distortion of the
music. By using insulation with
low dielectric loss the distortion
due to dielectric absorption is
greatly reduced.
The leading edges of the music
being performed are much
more realistic and the natural
decay of the notes are better
portrayed
2mm thick insulation of each
conductor wire
Each conductor that carries
current between the amplifier
and speakers generates a
magnetic field that affects the
conduction of the other
conductor. This creates a
modulation signal that is out of
phase with the music and can be
heard as a distorted muddling of
the sound. By spacing the
conductors further apart than is
usual, this ‘Transient Phase
Distortion’ is much reduced.
With lower ‘Transient Phase
Distortion’ the sound is much
clearer during complex music
passages and bass notes are
much better defined within the
music.
Cables are twisted throughout
This prevents the cable acting as a
‘loop aerial’ which picks up RFI
that adds distortion to the sound.
Clearer sound quality
Positive and negative
conductors are reversed
We specify that each batch of
cable manufactured is taken from
By applying strict quality control
to the wire ‘direction’ we
13
the same continuous length of
wire and that the positive and
negative conductors are reversed
in direction.
achieve a cleared more focussed
sound quality with a darker
silence between notes in the
music.
Rhodium plated 4mm
connectors
Better signal transmission
between the cable and
connectors due to lower
tarnishing.
Rhodium plating delivers a
clearer and fast sound than by
using gold plating.
Locking mechanism on
connectors
Tighter strong connection
between the plug and its
receptacle.
Sound quality is clearer as a
result of the tighter connection
The Sound of SAMBA
“Black Rhodium have done it again, building on the success of their twist loudspeaker cable, the Samba
uses the same "twisted" configuration but instead utilizes heavy gauge silver plated copper wires and
thicker insulation, the result is breathtaking.
Graham Nalty the owner of Black Rhodium has responded to recent developments in the hi-fi cable
industry by producing a wonderfully open sounding cable, bass extension has to be heard to be believed,
overall a true heavyweight in the speaker cable world and made in the UK. It makes me proud to be
British! “
David Brook, MCRU – www.mcru.co.uk
“Very impressive and wide sound stage and good imaging. High level of detail across the frequency
range with extended tight bass and smooth top end.
My taste is classical and with the combination of Musical Fidelity Amp/CD and PMC Twenty Series
speaker cables performed very well in my opinion.
New style locking banana plugs are a boon to ensure rock solid contact with amp &Speaker terminals.
Good upgrade for home system when you fit and forget but when used in an instore demo situation are
not ideal as they require both hands to fit & remove.
The physical size of the cable and the twist makes them more visually obvious – needs care when
connecting amp to speakers to keep make them discreet as possible.
This is often very important when system is integrated into a normal room rather than a dedicated
listening room.”
David Brown, Technosound. www.technosound.co.uk
Next Stop for Samba – DCT and other new developments
We plan to introduce a DCT version of Samba during 2013. We are also conducting research into
reducing vibration carried by the cable between the speaker and amplifier and also into offering a better
(in terms of sound quality) interface between cable and terminals. We will wait for the results of this
research before offering our DCT version of Samba, and in the meantime we will be offering Gladiator
and ACT 3 as our DCT speaker cables.
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Graham Nalty
Designer of
Black Rhodium cables
Graham Nalty has designed audio equipment over several decades and is
passionately committed to the improvement of sound quality via highly
innovative design and advanced technologies.
Black Rhodium supplies audio and video cables to music lovers throughout the
world via a team of professional audio distributors and retailers.
Black Rhodium cables have won many highly prized awards from audio magazines
for their quality and have received testimonials from customers who appreciate
the added enjoyment and insight into their favourite music that Black Rhodium
cable provide.
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Appendix 1
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