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Klipsch Reference Wireless 2.1 Sound System

RW-51M powered bookshelf speakers, RW-100SW subwoofer, and WiSA wireless transmitter

Item # 700AX21

Here's a convenient wire-free stereo sound system with sub from Klipsch that doesn't require a receiver or amp.

Here's a convenient wire-free stereo sound system with sub from Klipsch that doesn't require a receiver or amp.

California customers:
Please click here for your Proposition 65 warning.

Discontinued item
1 question - 1 answer

Item # 700AX21

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About the Klipsch Reference Wireless 2.1 Sound System

Eric A.

A wireless 2-channel sound system with bass

WiSA technology transmits high-quality lossless audio signals wirelessly, and the system can be expanded for full-on surround sound up to 7.1 channels.

A wireless 2-channel sound system with bass

My preferred music-listening setup includes stereo speakers and a sub. Klipsch has built just such a system that connects wirelessly and doesn't require a bulky receiver, which is very cool. This bundle includes stereo speakers and a subwoofer that receive a wireless signal directly from an included matching WiSA transmitter, for a convenient upgrade to your listening, gaming, and watching experience.

How WiSA wireless technology works

WiSA technology transmits high-quality lossless audio signals wirelessly, and the system can be expanded for full-on surround sound up to 7.1 channels.

The system is built around an included Axiim LINK wireless home theater transmitter that connects to compatible sources using the provided USB cable. Compatible sources include:

  • Xbox One consoles
  • 2019 and 2020 LG OLED or NanoCell TVs
  • Windows® PCs
  • Mac® computers

The Axiim LINK HD automatically recognizes and connects new wireless speakers as they are added, so you can add a WiSA-enabled Klipsch center channel or surround speakers in the future if you want to. Just keep in mind that each speaker must be plugged into AC power.

Solid speakers and sub

The included RW-51M bookshelf speakers feature proprietary 90° x 90° Tractrix® horn technology coupled with Linear Travel Suspension (LTS) titanium tweeters, for clear highs. A 5-1/4" spun-copper woofer handles the midrange and bass. Each speaker has a built-in 60-watt amplifier and custom digital signal processing for detailed, dynamic sound.

Bass is provided by a fine-looking RW-100SW subwoofer with a 10" spun-copper IMG (Injection Molded Graphite) woofer.


Product highlights:

Axiim LINK HD wireless transmitter:
  • WiSA-ready transmitter creates a seamless wireless audio connection
  • transmits lossless 24-bit/48kHz audio
  • works with Klipsch Reference Wireless home theater speakers
  • USB 2.0 high-speed connection for compatible sources:
    • Xbox One Consoles
    • 2019 & 2020 LG NanoCell and OLED TVs
    • Windows PCs
    • Mac computers
  • system is expandable up to 7.1-channel wireless surround sound
  • Bluetooth®-enabled for app control via mobile devices
  • Axiim LINK mobile app for iOS® and Android™ enables future firmware updates
    • remote control of speaker EQ, volume adjust, bass management and audio mixing
  • infrared receiver compatible with third party universal remote controls
  • 4-1/4" diameter x 1-1/8" high
2 Klipsch RW-51M speakers (each):
  • WiSA wireless technology built-in
  • 5-1/4" spun-copper Injection Molded Graphite (IMG) woofer
  • 1" titanium Linear Travel Suspension (LTS) tweeter matched with a 90° x 90° Tractrix® horn
  • rear-firing bass-reflex port
  • built-in 60-watt RMS amplifier
  • frequency response: 62-21,000 Hz
  • black textured woodgrain vinyl finish
  • Axiim LINK HD transmitter required
  • 7"W x 13-5/16"H x 8-1/2"D
  • weight: 10.2 lbs.
Klipsch RW-100SW subwoofer:
  • 10" front-firing IMG (Injection Molded Graphite) spun-copper woofer
  • 225-watt RMS amplifier
  • frequency response: 27-125 Hz
  • rear-firing port for increased low-frequency performance
  • black textured woodgrain vinyl finish
  • Axiim LINK HD transmitter required
  • 12-1/2"W x 14-1/2"H x 16-7/16"D
  • weight: 39 lbs.

What's in the box:

  • axiim LINK: Wireless home theater USB audio transmitter
  • 40" microUSB-to-USB cable
  • Quick Start Guide
  • LINK Guide
  • Klipsch RW-51M:
  • 2 Wireless powered speakers
  • 2 Grilles
  • Two 5' AC power cords
  • Eight self-adhesive rubber feet
  • User Manual
  • Warranty Information
  • Important Safety Instructions
  • Klipsch RW-100SW:
  • Wireless powered sub
  • Grille (installed)
  • 5' AC power cord
  • User Manual
  • Important Safety Instructions
  • Warranty Information

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More details on the Klipsch Reference Wireless 2.1 Sound System

Stacey B.

Features & specs

Ethernet Port No
USB Port No
Aux Input No
RCA Input No
XLR Input No
Phono Input No
Digital Input No
HDMI Input No
Headphone Jack No
Subwoofer Output No
Wireless Features
Bluetooth N/A
Wi-Fi No
Wi-Fi Bands No
Driver Details
Tweeter Size (Inches) 1.0
Tweeter Type Tractrix Horn
Tweeter Material Aluminum LTS
Midrange Size (Inches) ---
Midrange Type ---
Woofer Size (Inches) 5.25
Woofer Type Copper-spun IMG
Audio Specs
Watts RMS (Continuous) 345
Watts Maximum (Peak) 690
Frequency Response 27-21k
Max. Digital Audio Bit Depth 24-bit
Max. Digital Audio Sample Rate 48 kHz
Handheld Remote No
Control by app Apple iOS, Android
Amazon Alexa No
Google Assistant No
Other Specs
Width (Inches) 7.0625
Height (Inches) 13
Depth (Inches) 10.125
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research


2.1Ch WiSA Speaker System: This WiSA enabled speaker system consists of two Klipsch RW-51M wireless powered bookshelf speakers, a Klipsch RW-100SW powered sub, and the axiim LINK wireless USB audio transmitter to create a wireless 2.1ch speaker system. This wireless sound system is optimized with custom digital signal processing and dedicated amplifiers in each speaker that deliver maximum performance to your music and movie soundtracks. A WiSA Ready LG TV or compatible Xbox One, Windows 10 PC, or Mac computer is required to complete your system.

Note: Start with this 2.1ch WiSA speaker system from Klipsch and add on additional Klipsch Reference Wireless speakers ( RW-51M bookshelf speakers / RW-34C center speaker) to create up to a 7.1ch speaker system.

WiSA Technology: Through the use of state-of-the-art WiSa (Wireless Speaker & Audio) technology, the Klipsch RW-51M speakers and the axiim LINK transmitter deliver unmatched wireless audio performance and ease-of-use. WiSA runs on a dedicated network separate from your in-home WiFi, meaning fewer slowdowns and dropouts. WiSa technology transmits 24-bit/48kHz audio with robust error recovery for uninterrupted listening enjoyment. With extremely low latency (5.1 milliseconds) and negligible speaker-to-speaker delay (+/-1.0 microseconds), it offers flawless wired-quality performance and reliability. WiSa technology reliably transmits uncompressed audio from 2ch stereo to 7.1ch surround, along with system configuration and calibration data - all wirelessly. It has a range of approximately 30'.

Note: In some cases wireless WiFi routers can cause interference with a WiSA system. One fix for this is to configure your router (both 2.4GHz and 5GHz) to a fixed channel instead of using the default "automatic" setting. In most cases, customers no longer will experience drop-outs after this.

axiim LINK Wireless USB Audio Transmitter: The axiim LINK is a wireless multi-channel USB audio transmitter with WiSA technology. The axiim LINK connects to select WiSA Ready 2019 LG TVs, the Xbox One, a Windows PC 10, or App Mac computer through a USB cable, and then wirelessly delivers up to 7.1 channels of uncompressed 24-bit/48kHz audio to the included Klipsch Reference Wireless Series speakers. The axiim LINK features a microUSB 2.0 high speed (480Mbps) data port and comes with a 40" microUSB-to-USB cable that plugs into a free USB port on your compatible LG TV, Xbox One, Windows 10 PC, or Mac computer.

  • 2019 LG OLED & NanoCell TVs: Connect the LINK to a 2019 LG OLED or NanoCell TV with the provided USB cable. Use the TV's on-screen guide to setup your WiSA wireless speakers and enjoy a 2ch stereo or 5.1 home theater experience.
  • Xbox One, Windows 10, & Mac: Connect the LINK to an Xbox One, Windows 10 PC, or Apple Mac computer with the provided USB cable; then use the LINK mobile app to configure your wireless speaker system. Enjoy up to 7.1 channels of immersive HD audio. X box One, Windows 10, and Mac devices are not WiSA Ready and may require additional software, firmware, security, and/or hardware to function with WiSA certified speakers.


  • Only one compatible source device can be utilized. Up to a 7.1ch speaker system is supported (LG TVs are limited to either 2ch or 5.1ch).
  • The axiim LINK supports 2ch PCM, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, DTS, and DTS-HD. It can even upmix 5.1ch content to 7.1ch, as well as downmix 7.1ch content to 5.1ch - depending on the number of WiSA certifed speakers in your system.
  • The axxim LINK does not support Dolby Atmos or DTS:X. However, it will downmix these immersive 3D audio formats to one of the supported formats.

Klipsch Reference Wireless Series Speakers: The RW-51M bookshelf speaker is part of Klipsch's Refrence Wireless Series allowing you to create a wireless speaker system through the use of the included axiim LINK wireless USB audio transmitter and a WiSA Ready LG TV or compatible Xbox One, Windows 10 PC or Mac computer - all without the use of an AV receiver or speaker wires. The RW-51M wireless powered bookshelf speakers deliver legendary Klipsch sound with incredible detail and dynamics.

  • Built-in Amplification: Each wireless powered bookshelf speaker employs a built-in, ultra-low noise 60W (RMS) / 120W (Peak) amplifier for dynamic, room-filling sound. The built-in amplifiers have been custom deigned to maximize driver performance and eliminate the need for external amplification.
  • Two-Way Driver Design: The Klipsch Reference Wireless Series RW-51M speakers deliver room-filling sound from a two-way driver design. Each speaker includes a 1" aluminum diaphragm compression driver with a Linear Travel Suspensions (LTS) mated to 90° x 90° square Tractrix Horn, and 5.25" copper spun IMG woofer. The tweeter and woofer are crossed over at 1660Hz.
    • Linear Travel Suspension (LTS): Klipsch exclusive Linear Travel Suspension (LTS) aluminum tweeter minimizes distortion for enhanced, detailed performances. Using Kapton, an extremely light and rigid material, in the tweeter suspension provides high efficiency and improve resolution and detail.
    • 90x90 Tractrix Horn: Klipsch exclusive 90x90º Tractrix horn technology ensures the high frequency energy is aimed at the listener and reduces artificial reverb or filtering caused by indirect sound bouncing off of walls. Using this proprietary focused technology gives you the best clarity, dynamics, and detail from your movies and music.
    • Copper Spun IMG Woofer: Injection Molded Graphite (IMG) woofer cones are exceptionally light while being extremely rigid - providing remarkable low frequency response, with minimal cone breakup and distortion.
  • Bass Reflex MDF Cabinet: The Klipsch Reference Wireless Series RW-51M employs a bass reflex enclosure with a rear-firing port for greater efficiency and bigger bass response. The ported enclosure features a MDF cabinet finished with a a scratch-resistant, textured wood grain vinyl. The rigid MDF cabinet utilizes internal cross-bracing to minimize panel vibrations that can color sound. Each speaker also comes with a low profile magnetic grille.

Klipsch Reference Wireless Series Powered Sub: The Klipsch Reference Wireless Series powered sub delivers deep, impactful, dynamic bass thanks to its 10" copper-spun IMG woofer, 225 watt Class D amplifier, and bass reflex MDF enclosure.

  • 10" Woofer: The Klipsch Reference Wireless Series RW-100SW powered sub is outfitted with a powerful 10" copper-spun IMG (injected molded graphite) front-firing woofer for deep bass. The copper-spun IMG woofer is exceptionally light while being extremely rigid, providing remarkable low frequency response with minimal cone breakup and distortion. The front-firing woofer gives you greater placement flexibility than a down-firing woofer.
  • 225 Watt Class D Amp: The Klipsch RW-100SW powered sub employs an all-digital 225 watt RMS (450 watt Peak) amplifier for high efficiency and dynamic bass performance. The built-in, all-digital amplifier of the RW-100SW subwoofer delivers ample power with high efficiency and true-to-source accuracy reproduction - thus providing maximum output, detail, and power that fills your home.
  • Bass Reflex MDF Cabinet: The Klipsch Reference Wireless Series RW-100SW's enclosure uses a bass reflex design with a down-firing port for greater efficiency and bigger bass. The bass reflex enclosure features durable MDF construction and is finished with a scratch resistant, textured wood-grain vinyl. Its reinforced MDF construction reduces cabinet vibration for less audible coloration and improved sonic accuracy - giving you the ultimate listening experience that's built to last. There are heavy-duty rubber feet on the bottom of the cabinet to help isolate the subwoofer from your floor. The included low-profile front grille adds a refined look and is acoustically transparent.

Intuitive Control: The WiSA system can be setup and controlled from the LINK mobile app on your compatible Apple iOS or Android mobile device. The axiim LINK also supports IR commands from universal remote controls (sold separately).

  • LINK Mobile App: The LINK mobile app (for Apple iOS 10.0+ and Android OS 4.4+) provides complete control and fine tune adjustment of your WiSA enabled audio system through your compatible smartphone or tablet device. The app's advanced features allow you to adjust volume trim on each independent speaker, adjust EQ settings, and more. Your compatible Apple iOS or Android mobile device must be wirelessly connected to the axiim LINK via Bluetooth 4.2 LE (Low Energy).
    • Speaker Setup: Indicate the number of speakers you are wirelessly connecting. Choose from 2.0, 2.1, 3.0, 3.1, 4.1, 5.1, or 7.1ch
    • Volume Level: You can adjust the overall speaker system volume from 0 to 100, as well as adjust the volume level of each speaker in the system independently. There is also a Mute function that is applied to all speakers.
    • Equalizer: A 10-band EQ can be applied globally to all speakers or individually adjusted per speaker. The 10-band EQ consists of 31, 62, 125, 250, 500, 1k, 2k, 4k, 8, and 16k Hz bands that are adjustable from -10 to +10 dB. There are also EQ presets (such as Rock, Jazz, Klipsch Optimized, Custom, etc.).
  • IR Receiver: The axiim LINK features a front-panel IR receiver which allows integration with a universal remote control (such as the Logitech Harmony or Xbox One remote). The universal remote will only provide basic control functions, such as Power and Volume. The LG TV magic remote cannot be used to control the axiim LINK since it operates via RF and not IR.
Mounting Options: The Klipsch WiSA system provides flexibility when it comes to mounting the wireless speakers, sub, and the axiim LINK transmitter.
  • Klipsch Reference Wireless Speakers: The Klipsch RW-51M can be placed on a speaker stand, bookshelf, table, or other flat surface. The wireless powered bookshelf loudspeakers come with self-adhesive rubber feet to secure the speaker in place and prevent any damage to your stand's or shelf's surface. The rubber feet add approximately 0.3125" to the overall height of the speaker. There is no included bracket, keyhole slot, or threaded insert to wall-mount the speaker.
  • Klipsch Reference Wireless Sub: For optimum performance, place the subwoofer in a corner of the room on the same wall as your front channel speakers. Please note that room placement can have a dramatic effect on the performance of your powered subwoofer. Corner placement, as suggested above, will increase the amount of bass output, while placing the subwoofer along the middle of a wall, or out in the room will decrease the amount of bass output.
  • axiim LINK Transmitter: The axiim LINK wireless multi-channel USB audio transmitter features a scratch-resistant, non-skid silicone rubber base for stable placement on a tabletop, stand, shelf or other flat surface. The axiim LINK also features an integrated magnetic base that allows you to conveniently attach the wireless multi-channel USB audio transmitter to your TV stand, wall-mount, or other magnetic surface.
Power Requirements: The Klipsch Reference Wireless speakers will require AC power, while the axiim LINK transmitter is powered via USB (5V/1.5A).
  • Klipsch Speakers & Sub: Each wireless powered speaker and sub comes with a detachable 5' AC power cord that will need to be plugged into the back of the speaker and into an AC wall outlet or surge protector (sold separately - see Accessories Tab).
  • axiim LINK Transmitter: The axiim LINK is powered via its USB connection (no separate AC power adapter required). The LINK receives its power from the USB port (5V1.5A) on your compatible LG TV, Xbox One, Windows 10 PC, or Mac computer.

Firmware Updates: Firmware updates are done wirelessly through the LINK mobile app for the axiim LINK transmitter and the Klipsch Reference Wireless Series speakers.

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Customer Q&A

1 question already asked

Looking to connect the Axiim Link HD to a Marantz NR1609 - are there other connection options beside USB?
[ TOM  Apr 22, 2020 ]
1 answer
There are no other inputs on the Axiim Link. It will not work with a home theater receiver.
[ JASON  May 17, 2020 ]  Staff

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