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AudioQuest's SUB-3 cable features the finest-quality materials to help your high-performance powered subwoofer deliver extraordinarily clear, detailed bass. This triple-balanced cable features three identical conductors for clean signal transfer. Each conductor is a single, unbroken strand of 6.1% silver. Solid conductors eliminate electrical and magnetic interference that can add brittleness to the sound with multi-strand conductor cables.

Dielectric-Bias System
Most higher-end cables require a break-in period before they perform their best. A charge builds up in the insulation through continual use, increasing the efficiency of the cable. This charge can dissipate when the cable's not in use, giving you less than optimal performance until it builds up again.

AudioQuest's Dielectric-Bias System (DBS) eliminates this break-in period. A small battery pack attached to the cable polarizes the insulation with a 36-volt charge, giving you clear, expressive sound from your system every time you turn it on. This also helps eliminate the time delay that can create audio jitter.

Air tube insulation and shielding
Each conductor has its own insulating air tube, which prevents information smearing better than foam insulation. An additional layer of shielding virtually eliminates electronic noise, for the cleanest signal possible.

High-quality connectors eliminate the weakest link
The SUB-3 features RCA connectors made of silver-plated copper. Although this same material can cause high frequencies to sound edgy with full-range analog audio signals, it actually improves bass articulation when used in subwoofer cables. The connectors are fastened by cold welding — a process that uses high pressure and silver paste to minimize signal loss. By contrast, solder tends to impede the signal, and heating the copper conductor can negatively affect its performance.

Product Highlights:

  • three silver-plated solid copper conductors (silver layer is 6.1% of total conductor)
  • Dielectric-Bias System with attached battery pack (batteries included) maintains constant 36V charge for optimal performance
  • 100% coverage shield for noise-free signal transfer
  • cold-welded silver-plated RCA connectors
  • built-in ground wire with spade lugs
  • textile braid cable cover
  • warranty: 5 years
  • Our 60-day money-back guarantee

AudioQuest SUB-3 Reviews

Average Customer Review:

1 Review


Written by: Mr Music from UK on July 10, 2013

First off mine is the 2013 model with 72v dbs system in XLR and 7.5 meters long.

Well i own the notorious JL Audio Fathom F113 in a fairly high end Hi-Fi system. I have read other reviews on this cable and really don't think they do it justice, when i plugged this cable in i could immediately tell a difference. This was confirmed on my Velodyne sms-1. With the previous cable i had adjusted the EQ to give a near prefect flat frequency response. Using all the same settings and the sub 3 in place the frequency response changed completely, previously i had to set a very steep roll off above 48hz to stop the above frequency response from cancelling the 70-150hz range and what happened when i put the sub-3 in place? No cancellation what so ever. Personally i think this cable is so fast it has changed the phase relationship (or corrected it) by 180 degrees above 60hz, the bass is so tight it sounds like the bass is coming from my speakers. i have now changed the slope to 6db per octave from 48 and all it does is add to the upper frequency.

Now i use a 80hz cross over frequency with a 6db slope and it sounds outstanding, the sub is now interacting with the midrange by adding weight to the subtlest of woofer notes. The bass is now what i would call reference. I am hearing well modulated low frequency bass more clear and strong with the upper bass finesse as if its a woofer, it doesn't even sound like a typical sub spilling out low frequency bass it actually sounds like a speaker fleshing out bass from the very bottom to top octave.

When listening to live music the bass comes alive with correct timber which sometimes fools me into believing the sub is off, when i do turn the sub off all the weight and midrange magic disappears , turn it back on again and it just adds to the soundstage with clarity and depth.

On top of this my previous cable added mobile phone buss and interference that has now disappeared even with my mobile sat on top of the sub.

So all in all a brilliant cable which i would highly recommend for capable subwoofers and up stream equipment that can provide the detail to the sub.

Pros: Detailed

Cons: None.

Hands-on research

What's in the box?

Download owner's manual

  • 9.8' Subwoofer cable with a male mono RCA connector and 8" ground lead on each end and a 36V DBS module attached to one end

Product Research


Sub-3 Series Subwoofer Cable: The AudioQuest/CinemQuest SUB-3 subwoofer cable uses three solid 6.1% Silver conductors inside PE Air Tubes. Solid conductors eliminate strand-interaction distortion. PE Air Tubes minimize information smearing caused by any solid or foam insulation. The 36V electrostatic field on the PE tubes almost eliminates remaining insulation induced distortion. Three conductors along with welded silver-plate, single-ended RCA plugs  insure optimum performance while a 100% coverage shield insures noise-free performance. The Silver-plated plugs are welded to Sub-3 using 8,000 amperes.

Silver-Plated Copper (SPC): Silver-Plated Copper (SPC)  provides superior performance for subwoofer audio frequencies. SPC enhances the articulation and intelligibility of low frequency information from your amplifier to your subwoofer.

Note: Do not use the Sub-3 subwoofer cable as a full range audio cable.

Dielectric-Bias System (DBS): All insulation slows down the signal on the conductor inside. When insulation is un-biased, it slows down parts of the signal differently, a big problem for very time sensitive multi-octave audio. AudioQuest's DBS creates a strong stable electrostatic field which saturates and polarizes (organizes) the molecules of the insulation. This minimizes both energy storage in the insulation and the multiple nonlinear time-delays. Sound appears from a surprisingly black background with unexpected detail and dynamic contrast. The DBS pack's batteries will last for years and a test button and LED allow for the occasional battery check.

Ground Connections: If you hear noticeable hum in your system after connecting your subwoofer, please attach the Sub-3 cable's ground leads to your audio gear. Some audio equipment have a ground (GND) connection on the back-panel, if not, attach the ground spade lugs to any screw on the equipment chassis of both the source and the subwoofer.

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