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Black subwoofer cube with down-firing 6.5 driver and rear control knobs

NZXT

NZXT Relay Subwoofer 140 W 6.5" Driver Black

SKU CH-SJFJ-ZM31K

Adds deep bass to desktop audio with a 6.5" down-firing driver and 140 W power

  • Product typeWired
  • Key featuresThe NZXT Relay Subwoofer enhances your desktop speakers with
  • Deep, ground-shaking bass for games and media from a down-firing 6.5-inch driver and 140 watts of power
  • Adjustable crossover and phase control knobs let you fine-tune blending with other speakers
  • Compact design fits neatly under a desk while still delivering powerful low-frequency output
  • High-quality MDF enclosure minimises resonance and distortion for clear, vibration-free audio
  • Wired connection provides a stable link to your desktop speaker system

NZXT Relay Subwoofer 140 W

This powered subwoofer adds deep bass to a desktop audio system. A down-firing 6.5-inch driver delivers 140 watts of output for games, music and movies. The enclosure uses high-quality MDF to reduce resonance and distortion. It connects to compatible speakers via a wired link.

Who should add this subwoofer

Gamers and media listeners who want stronger low-frequency impact from their existing speakers will benefit. Users without a separate speaker set to pair it with cannot use this unit on its own. Buyers who need wireless connectivity or a built-in amplifier for passive satellites should look at other solutions.

The 140 W down-firing driver

The 140-watt amplifier drives a 6.5-inch down-firing woofer to produce ground-shaking bass. Adjustable crossover and phase control knobs let you blend the subwoofer precisely with your main speakers. This specification determines whether the output level and tuning range match your listening environment.

How it compares

Measured against everything we stock in Desktop Speakers & Soundbars, at today’s prices. Recalculated every night.

Price $79.99
Pricier than about 80% of the 838 comparable items (median $40.99).

Specifications

Product
Brand nameNZXT
Part numberAP-SUB80-US
Product typeWired

Questions about this item

How do I connect the Relay Subwoofer to my NZXT Relay speakers and what step is often missed?

Connect the subwoofer output on the Relay speaker controller to the subwoofer input using the supplied cable, then set the crossover knob so the subwoofer blends with the speakers instead of overlapping them.

What part of the Relay Subwoofer is most likely to need attention after extended use?

The down-firing 6.5-inch driver surround can dry out over time, and the MDF enclosure joints should be checked for any loosening caused by sustained vibration.

At what point does the 140-watt amplifier hit its limit during long listening sessions?

The built-in protection circuit engages when the amplifier reaches its 140-watt continuous rating, reducing output to prevent overheating and distortion.

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