AudioQuest

Speaker Cable w/ ZERO for Treble & BASS for Bass

Designed specifically to optimize the performance of biwireable loudspeakers, ThunderBird ZERO BiWire COMBO speaker cables comprise a ThunderBird ZERO and ThunderBird BASS, conveniently joined at the amp end.

DESCRIPTION

Solid Perfect-Surface Copper+ (PSC+) Conductors
Solid conductors prevent strand-interaction, a major source of dynamic distortion. Extreme-purity PSC+ solid copper minimizes distortion caused by grain boundaries, and, when direction-controlled for surface asymmetry, facilitates crucial Radio-Frequency Noise-Dissipation.

Carbon-Based Linearized Noise-Dissipation System (NDS)
AQ’s comprehensive Linearized Noise-Dissipation System combines multiple shields and a carbon-based linearized resistive network that turns most of this noise into heat. By "linearized," we mean that the system is equally effective across extremely wide bandwidth, rather than at selected frequencies only, as is more common. The remaining bad energy is effectively drained away from the sensitive amplifier circuits via directionally controlled signal and shield conductors.

ZERO-Tech
The only complete way to eliminate characteristic-impedance mismatches between a cable and the attached source and load is for the cable not to have any fixed characteristic-impedance value. ZERO-Tech accomplishes this by eliminating interaction between the insulation (dielectric) and the cable’s conductors—enabling uncompressed current transfer. All-important transient current is unrestricted, and RF Noise-Dissipation is linearized (consistent octave to octave).

RF/ND-Tech (BASS CABLE ONLY)
Though a cable’s ground leads are integral to a component’s signal transmission, they also act as an antenna. Thus, they are subject to induced Radio-Frequency (RF) noise. RF noise is a parasitic signal that is typically coupled directly into a system’s most sensitive audio/video circuits. AudioQuest’s RF-on-ground Noise-Dissipation (RF/ND-Tech) greatly reduces resulting distortion and signal masking, yielding unprecedented levels of Noise-Dissipation across the widest bandwidth (range) of radio frequencies possible. Our unique circuit topology uses a common-mode phase-cancelling array, providing linear noise dissipation across the entire length of the cable (US Patent # 8,988,168).

72v Dielectric-Bias System (DBS) with Level-X RF Noise-Trap
Insulation is also a dielectric that acts like a shunt-filter. Properly biasing the dielectric linearizes the filter, significantly improving the cable’s wide-bandwidth ability to dissipate induced noise. The DBS pack’s Level-X Noise-Trap “pulls” RF Noise out of the cable, further reducing attached audio circuit misbehavior.

ThunderBird Bi-Wiring
When possible, running separate cables to the treble and bass “halves” of a speaker significantly reduces distortion. Bi-Wiring keeps the large magnetic fields associated with bass energy out of the treble cable, allowing the delicate upper frequencies to travel a less magnetically disturbed path, like taking the waves out of the water when you swim.

AudioQuest’s RF/ND-Tech (patented RF-Canceling Ground-Noise Dissipation) attracts RF energy away from the amplifier’s output. When properly implemented, Bi-Wiring has always been a cost-effective way to get better performance for the same or less money. With RF/ND-Tech, the advantage of Bi-Wiring is much more dramatic. Because RF/ND-Tech is so effective, BASS model cables are only for 10KHz and below; do not use a BASS cable full-range or on treble.

ThunderBird BASS cable is ideal with ThunderBird ZERO. A Bi-Wire COMBO with BASS and ZERO cables joined together at the amplifier is usually most convenient. When Tri-Wiring, use BASS cables on the Midrange and Bass inputs.

Caution: Do not Bi-Wire with two ZERO cables. ZERO cables in-parallel can create a very high-frequency resonant peak (ringing), and resulting poor sound. Only use a ZERO plus a BASS cable (whether or not joined as a COMBO). Second best is a single ZERO with AQ Bi-Wire jumpers.

SPECIFICATIONS

Metal
Solid Perfect-Surface Copper+ (PSC+) Sonic-Signature Conductors & Long-Grain Copper (LGC)

Noise Dissipation
RF/ND-Tech and Multi-Layer Carbon-Based Noise
Dissipation

Geometry
ZERO-Tech (No Characteristic Impedance)

Gauge
10 AWG

Signal Type
Analog

Jacket
Blue on Black Braid

Sold As
Pair - 2 Individual Cables

USAGE GUIDE

Amplifiers

Speakers

IN THE BOX

Sold As

Pair - 2 Individual Cables

AWARDS

The Absolute Sound 2024 Editors’ Choice AwardThe 2024 March issue of The Absolute Sound includes the magazine’s annual Editors’ Choice Awards, given to products its editors believe are easy to recommend — products they would happily own and quickly recommend to family and friends.

Key Features & Technology Explained

Solid Conductors

Solid conductors prevent strand-interaction, a major source of dynamic distortion in cables.

Metal

AudioQuest's best copper. To the greatest extent presently possible, extreme-purity Perfect-Surface Copper+ (PSC+) conductors minmise distortion caused by grain boundaries.

Noise Dissipation

Alternating layers of metal and carbon-loaded synthetics "shield the shield", minimising RF noise before it reaches the layer attached to ground.

Technology

ZERO-Tech eliminates the electrostatic between the cable's high and low signal conductors, enabling linear Radio Frequency (RF) Noise-Dissipation, and uncompressed transients.

Technology

RF/ND-Tech minimises circuit misbehaviour by cancelling induced RF noise.

Technology

72v Dielectric-Bias System (DBS) saturates and polarises insulation, allowing clear, dynamic sound against a quiet "black" background.

Direction Controlled

All conductors controlled for RF-noise directionality.