The speaker cable model Type 4 was first introduced about 1983. It wasn’t the prettiest cable, but the performance advantage of its polypropylene insulation was dramatic and much appreciated. Several evolutionary steps later, the current version of Type 4 was introduced in 1995—a design whose foundation is so well balanced that it hasn’t changed since then—and still isn’t changing.

Types 9+DBS Low-Distortion & Low-Noise speaker cable is essentially Type 4 with better metal, added layers and techniques of Noise-Dissipation for more effective noise control and AQ's patented Dialectric-Bias System (DBS)

In addition, Type-9+DBS conductors are a little bigger than previous 4-series cables. The conductors are a little farther apart, reducing interaction between adjacent conductors by 35%.

Solid Perfect-Surface+ Sonic-Signature Conductors
Multi-Layer Carbon-Based Noise-Dissipation and Direction-Controlled Conductors
72V Dielectric-Bias System with Carbon Level Radio-Frequenecy Trap
Star-Quad Geometry

Features:

High Purity Conductors-Solid Perfect-Surface Copper+(PSC)+
Multi-Layer Carbon-Based Noise-Dissipation
Solid Conductors
72V Dielectric-Bias System With Carbon-Level Radio-Frequency Trap (DBS)
Star-Quad Geometry

AudioQuest

Star-Quad Series - Q2

AudioQuest

Star-Quad Series - Type 9+DBS

AudioQuest

Star-Quad Series - Type 9

AudioQuest

Star-Quad Series - Type 5