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AudioQuest Diamond USB Cable

In 1982 Sony gave us “Perfect sound forever,” along with the attitude that, “it’s just digital, so all CD players sound the same.” That was disproved and qualitative differences between players became accepted truth. Next came separate transport and DAC combos, which brought with it the attitude that “all S/PDIF digital audio cables sound the same…” until that too became disproved. Now the frontier has moved once again. Is digital audio really just ones and zeros? We don’t believe so, and once you’ve had a chance to listen to Carbon USB, you won’t think so either.
  • Solid perfect-surface silver conductors
  • Hard-cell foam insulation
  • Dielectric-bias system with radio frequency trap
  • All conductors controlled for RF noise directionality
  • Carbon-based 3-layer noise-dissipation system

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USB Terminations
Cable Length


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In 1982 Sony proposed "Perfect sound forever," with the notion that digital audio players sound the same. That assumption was disproven, and distinctions between units became evident. Later separate transport and DAC combos reinforced the idea that "all S/PDIF digital audio cables sound the same...", which was also discredited. AudioQuest Diamond USB Cable seeks to counter this notion, proving that digital audio is more than binary data.
Solid conductors prevent electrical and magnetic strand-interaction. PSS Solid-Silver minimizes distortion caused by grain boundaries and maximizes linear RF Noise-Dissipation.
It's easy to accomplish 100% shield coverage. Preventing captured Radio Frequency Interference (RFI) from modulating the equipment's ground reference requires AQ's Noise-Dissipation System (NDS). Traditional shield systems typically absorb and then drain noise/RF energy to component ground, modulating and distorting the critical "reference" ground plane, distorting the signal. NDS's alternating layers of metal and carbon-loaded synthetics "shield the shield," absorbing and reflecting most of this noise/RF energy before it reaches the layer attached to the ground.
All insulation between two or more conductors is also a dielectric whose properties will affect the signal's integrity. When the dielectric is unbiased, dielectric involvement (absorption and non-linear release of energy) causes different amounts of time delay (phase shift) for different frequencies and energy levels, which is a real problem for very time-sensitive multi-octave audio. Including an RF Trap (developed for AudioQuest’s Niagara Series of power products), ensures that radio-frequency noise will not be induced into the signal conductors from the DBS field elements. (DBS, US Pat #s 7,126,055 & 7,872,195 B1)

Hard-Cell Foam (HCF) Insulation ensures critical signal-pair geometry. Any solid material adjacent to a conductor is part of an imperfect circuit. Wire insulation and circuit board materials all absorb energy. Some of this energy is stored and then released as distortion. Hard-Cell Foam Insulation is similar to the Foamed-PE used in our more affordable Bridges & Falls cables and is nitrogen-injected to create air pockets. Because nitrogen (like air) does not absorb energy and therefore does not release any energy from or into the conductor, distortion is reduced. In addition, the material's stiffness allows the cable's conductors to maintain a stable relationship along the cable's full length, producing a stable impedance character and further minimizing distortion.
USB Terminations A-B, A-B, A-B, A-B, A-Micro, A-Micro, A-C, A-C, C-B, C-B, 3.0 A-3.0 Micro, 3.0 A-3.0 Micro, 3.0 A-3.0 Micro
Cable Length 0.75 M, 1.5 M, 3.0 M, 5.0 M, 0.75 M, 1.5 M, 0.75 M, 1.5 M, 0.75 M, 1.5 M, 0.75 M, 1.5 M, 3.0 M