Our TTC-4 loudspeaker cable has been developed with the professional listener in mind.
It does not cover up weaknesses in your hi-fi system, nor does it follow your personal taste and preferences. Yet it perfectly and accurately reflects the reality of a specific recording. It’s up to you – your judgement is crucial!
Fascinating listening experiences demand high quality speakers and amplifiers. If these conditions are met, then speaker cables get into focus. There are a variety of explanations and opinions about the optimal configuration. In order not to lose the ground under your feet, you should take a glance at proven solutions in other technical domains.
In professional transmission technology, coaxial cables are the preferred medium if the losses at the high frequencies are to be minimized. In these cables the energy is transported by an electromagnetic field, which is completely enclosed and guided between the inner conductor and the surrounding outer conductor (shield), thus minimizing stray fields and inductive components. The associated line theory is very clear and straightforward, and also the practical conditions are almost ideal: coaxial cables are very broadband and ensure time correct transmission of the signals.
Now, what about the situation concerning speaker cables? Normally zipcords or cables braided from multiple strands are used with large conductor cross-sections. These cables spread out a part of the electromagnetic field into the outer space. This increases the inductive component of the cable impedance, and in addition causes conduction losses at the high frequencies and also frequency-dependent transit times (dispersion), which deform the signals. The higher-frequency signal components arrive delayed and can be concealed by the lower-frequency components of the signal spectrum.
Investigations of the time behavior of conventional cables reveal deformations at fast signal transitions (transients). The effects are in the percentage range depending on the cable, but they may even cause greater impact than equally large harmonic and intermodulation distortions. The signal deviations not only
affect the transparency of complex signal structures, but may also cause physiological effects. Our hearing is
continuously busy with pattern recognition and is especially interested in transient signal structures (clicks,
cracking noise, etc.). They are compared with stored signal patterns and analyzed for possible danger potential.
This process is genetically implemented since time immemorial and may be essential for survival. Therefore,
it is constantly and subconsciously active. Falsified acoustic information irritates and burdens the recognition
process and can cause long-term fatigue and annoyance. Thus time-correct reproduction of complex signals, in
particular of fast temporal changes, is important for fatigue-free and relaxed listening.
The skin effect is another physical characteristic that occurs in all current-carrying conductors. It indicates
the frequency-dependent penetration depth of the electric field into the conductor, and therefore the
distribution of the current density inside the conductor. In the case of DC and low AC frequencies, the current
is homogeneously distributed across the conductor. With increasing frequency, however, it is increasingly
displaced to the peripheral area of the conductor. This effect is already noticeable at higher audio frequencies. For copper conductors, the penetration depth at 20 kHz is only about 0.5 mm. This means that 0.5 mm below
the surface of the conductor the current density is decreased to nearly one-third and decreases further
exponentially towards the center. In order to achieve frequency-independent conditions in the entire audio
range, the conductor diameter must be less than 1 mm. So it’s better to use thin instead of thick conductors.
Strands of thin, not mutually insulated, wires do not improve the situation. Due to the skin effect they behave
like a thick solid conductor since mainly the outer conductors are involved at higher frequencies. A detailed
description of cable issues can be found at .
What are the consequences which can be derived from current knowledge? Without doubt, coaxial cables
improve the fidelity of audio signals because their inductive impedance component is lower than with other
types of cables. Furthermore, the skin effect suggests the use of cables with thin solid inner conductors.
Comparisons with different cables have confirmed that such configured coaxial cables actually yield the
best sound results. The overall result is a more transparent and homogeneous sound image with improved
localization and impressive spatial depth. A good indicator of the cable quality is also the reduction or absence
of annoyance even after long listening sessions, also even with higher volume. It even creates the desire for
listening with higher volume to discover more details that formerly were not detected with other cables.
The TRUE TRANSMISSION CABLE TTC-4 has been developed based on the previously presented findings. The use
of coaxial conductors results in a nearly perfect signal transmission. Due to the optimized design the skin effect
is negligible in the entire audio range. Parallel connection of several coaxial cables reduces the losses even
more, and provides sufficient reserves for high power applications. The positive impacts of these actions are
convincing and have been confirmed by extensive listening tests with many speaker amplifier combinations.
The TTC-4 claimed in all cases its pole position.
With the TTC-4 you will probably have the impression for the first time that everything is simply just as it
should be. Some disturbing effects, which were previously accepted as characteristics of the loudspeakers
and amplifiers, may now disappear. The impressions of space and mediated physicality and clear contouring
of sound sources are impressive. For example, the sound of a piano will be so authentic that the instrument
seems to be physically positioned in the listening room. If you close your eyes, you will experience a private
concert. Soloists in the stereo center perform virtually live. Due to the precise time response the sound is never
harsh, but remains always delicate and differentiated. String Instruments are not moved towards the listener
in the high pitches, but will remain in the same spatial position in orchestral composite. Text intelligibility
of choirs will be improved and the individual voices are clearly separated against each other. Also artificial
intermodulation effects that can be caused by mutual interactions of voices and instrumental sounds are
missing. If the listening experiences can be summarized at all with a single word then most likely as ‘true’.