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MartinLogan SW2-TRD

Wireless subwoofer adapter kit

20 Reviews | 3 questions - 12 answers


Our take on the MartinLogan SW2-TRD

Want to enjoy the deep, rumbling bass of your subwoofer without a long cable run from your receiver? Pick up the MartinLogan SW2-TRD wireless transmitter and receiver, and transform your wired sub into a wireless unit. Simply connect the transmitter to your receiver's subwoofer preamp output. Then connect the receiver to the LFE input on your subwoofer. With a wireless range of up to 40 feet, you'll have more placement options to help you enjoy powerful bass to add depth to movies and music. 

Make your sub go wireless

Want to enjoy the deep, rumbling bass of your subwoofer without a long cable run from your receiver? Pick up the MartinLogan SW2-TRD wireless transmitter and receiver, and transform your wired sub into a wireless unit. Simply connect the transmitter to your receiver's subwoofer preamp output. Then connect the receiver to the LFE input on your subwoofer. With a wireless range of up to 40 feet, you'll have more placement options to help you enjoy powerful bass to add depth to movies and music. 

The SW2-TRD transmitter and receiver each include an AC adapter for power. Be sure to plug them into a quality power protection device to protect your equipment from damaging surges.

Product Highlights:

  • includes wireless transmitter and receiver for use with powered subwoofers
  • compatible with any brand of subwoofer with mono or stereo RCA inputs
  • wireless range: up to 40 feet
  • 16-bit/48kHz resolution/sampling rate
  • operates on 2.4GHz wireless band
  • includes AC adapter for each unit
  • warranty: 3 years (with product registration)
  • Our 60-day money-back guarantee
  • Some MartinLogan subwoofers feature a built-in wireless receiver and come with a transmitter for out-of-the-box wireless capability. These models include the Dynamo 700W and Dynamo 1000W.

What's in the Box:

  • Wireless transmitter
  • Wireless receiver
  • 2 AC power adapters (w/ attached 6' DC cord)

Great product. Works flawlessly. I use it to connect my 2nd sub, which is at a distance of 20 ft, on the diagonally opp. side of the main system .

Anonymous, Sprngfld Gdns, NY


MartinLogan SW2-TRD Reviews

Average Customer Review(s):

(20 Reviews)

MartinLogan SW2-TRD

Anonymous from Sprngfld Gdns, NY on 4/24/2018

Crutchfield Customer Review (What's this?)

Great product. Works flawlessly. I use it to connect my 2nd sub, which is at a distance of 20 ft, on the diagonally opp. side of the main system .



Great Product!

Anonymous from Belton, SC on 1/29/2018

Crutchfield Customer Review (What's this?)

Great product! Allows me to move my sub anywhere in my room. Works perfectly with no delays whatsoever. Perfect for setting up a home theater sub!



MartinLogan SW2-TRD

Anonymous from Vicksburg, MS on 11/18/2017

Crutchfield Customer Review (What's this?)

easy set up works very well seem to have to turn main volume up some to cause the sub to "wake up" from standby but after that works great.



Works perfectly

Christopher from Rockledge, FL on 10/8/2017

Crutchfield Customer Review (What's this?)

30-40ft away and perfect. Best part is after you hook up- you forget they are there.



Works great, but overpriced

David from Princeton, TX on 8/18/2017

Crutchfield Customer Review (What's this?)

Worked fine first try out of the box. No issues, and reviews stating that are why I bought even through it is pricey.

Pros: Works well with no issues and easy to setup.

Cons: Price!! This thing is stupid expensive given what it actually is. Also, the little blue led on it is much too bright Depending on where you place it.

It Works as described.

Jay from Henderson, NV on 7/20/2017

Crutchfield Customer Review (What's this?)

It workes. The ML transmitter 20' away from my receiver, and turns on 2 BIC PL200 12" subs, and one 10" Polk. 2 Y connectors. Polk is using 2 RCA & the BIC are red/1 lfe & black/1 lfe. While there is No humming or buzzing of the subs while powered up, but when shut off, the microwave causes low level pops in the bass speakers.

Pros: It Works. Simple Plug & Play. One unit for 3 subs.

Cons: Microwave inference

Works Perfectly!

Dave from Gainesville, GA on 5/31/2017

Crutchfield Customer Review (What's this?)

I bought this on the advice of Hunter, one of the Crutchfield representatives, after I called complaining that another device I bought for this purpose was not working. The ML connected quickly and works flawlessly. Thanks for the help Hunter!

Pros: Easy to hook up, easy to sync, no external noise transmitted.

Cons: None

Great Bass and no wires!

Brendan from walnut creek, CA on 2/17/2017

Crutchfield Customer Review (What's this?)

There are some cheaper alternatives out there. I tried a couple of them with terrible results. This device just works and that's what matters. My room is now full of consistent bass and I highly recommend it. I have my receiver and therefore the transmitter behind a wooden cabinet about 18 feet from the sub. The wireless receiver is tucked down alongside the sub, and it connects every time.

Pros: It works transmits through wood cabinets easy setup

Cons: Price, but you get what you pay for

Good sound

Anonymous from Chicago, IL on 1/12/2017

Crutchfield Customer Review (What's this?)

We bought these to avoid laying long subwoofer wires. Decided to give them a try based on reviews here and elsewhere. Works well, using over a range of about 12-15 ft. Haven't had any issues Would recommend the product

Pros: - Small - Easy to install

Cons: - Little expensive

MartinLogan SW2-TRD

Anonymous from Powell, OH on 1/2/2017

Crutchfield Customer Review (What's this?)

This was a great way to quickly and easily eliminate one of the many cables I have running across the floor and coiled up behind my home theater rack.

Pros: - small/compact - nice looking - very easy to pair - very easy to connect to the receiver and sub - essentially plug-n-play

Cons: - this is pretty expensive set but had good reviews - now I know why

MartinLogan SW2-TRD

Anonymous from Durham, NC on 12/15/2016

Crutchfield Customer Review (What's this?)

Worked great try another brand and it did not work, hooked these up and worked right off. Not cheap but they worked.



Just works

Ron G from Clarksburg, MD on 6/10/2016

Crutchfield Customer Review (What's this?)

Not one dropped signal since install, I wish everything worked as well as those ML sw2

Pros: Able to place sub anywhere without running wires

Cons: None

MartinLogan SW2-TRD

Julius from Brooklyn, NY on 3/8/2016

Crutchfield Customer Review (What's this?)

Sub Bowers & Wilkins 1500 watts connected to McIntosh MAC 6700 through this wireless set. Works very well.

Pros: Easy installation. No more wires.


Plug and Play

Katy, TX from katy, TX on 1/20/2016

Crutchfield Customer Review (What's this?)

Plugged it in, hit the pair buttons & poof away it went. My sub is a Klipsch - Reference 10" 300W

Pros: Even I made it work!

Cons: $$$$

Nice Solution

tbone from California on 12/13/2015

Crutchfield Customer Review (What's this?)

Happened upon this product looking to solve subwoofer placement issue. I can say that this has been a pleasant experience. The set-up and install of this product was a breeze. I did have to purchase connectors to fit my sub woofer. The joy of installing my sub woofer discretely and wirelessly in the listening area is fantastic.

Pros: Works as advertised, easy to install


Meh not bad

Anonymous from Knoxville, TN on 6/2/2015

Crutchfield Customer Review (What's this?)

This is a little expensive for the price and should come standard on all ML subs (which it doesn't). The audio is seamless with no distortion but my only gripe was a constant clipping/popping sound. They say in the manual that this is from electrical interference and to keep it away from Wifi signals. How am I supposed to do this when the sub needs a wall outlet and the other half is connect to my amp (which has wifi) and so close to the PS3?

Pros: No more wire!

Cons: Clipping/popping sound from interference. Expensive

Solid equipment

TG from Pennsylvania on 5/29/2015

Crutchfield Customer Review (What's this?)

This is a solid addition to a sound system if you have to place a subwoofer away from your receiver. It was easy to set up and so far it works flawlessly

Pros: Ease of set up. works well

Cons: There is a distracting bright blue light on the transmitter. I have a glass fronted equipment case so I had to use electric tape to cover the light so it did not turn the entire case a blue hue. Minor complaint but its all I got.

Works flawlessly

TVL813 from Tampa, FL on 4/12/2015

Crutchfield Customer Review (What's this?)

Simple setup. Works great. No lag. Highly recommended.



MartinLogan SW2-TRD

Anonymous from Las Vegas on 3/24/2015

Crutchfield Customer Review (What's this?)

Easy to set up with good response

Pros: Works well

Cons: Price

Excellent Solution

Tom from New York on 1/2/2015

Crutchfield Customer Review (What's this?)

Excellent Product. Set up easily & quickly. Sound is excellent.

Pros: Easy Setup. Very good sound quality.

Cons: A little expensive.


Hands-on research

Product Research


Wireless Sub Receiver/Transmitter Combo Pack: Although correct placement plays a key role in optimizing subwoofer performance, sometimes it imposes the inconvenience of running long lengths of cable through walls, along baseboards, or under floors and carpets. To solve the problem, MartinLogan designed the SWT-2 Receiver/Transmitter Combo Pack which allows you to place your subwoofer in the exact location where it will deliver the best bass without the cable clutter.

Compatibility: The MartinLogan SWT-2 wireless receiver/transmitter combo can be added to any AV receiver with an LFE/RCA output and any powered subwoofer with LFE/RCA input. The SWT-2 Receiver/Transmitter Combo Pack only supports wireless transmission to one power subwoofer.

Note: You cannot connect additional wireless receivers or transmitter to this system.

Uncompressed Audio Signal: MartinLogan engineers designed the SWT-2 with an uncompressed 16-bit/48-kHz sampling rate (exceeding the current CD standard of 16-bit/44.1-kHz), which proved more than adequate for use in the wireless transmission of low-frequency information below 200 Hz. And since the RF transmission is digital it is error-checked to ensure no deviation from the original signal.

2.4GHz Frequency Range: The SWT-2 operates in the 2.4GHz frequency range. Often, users of wireless technology complain about interference from other noise sources in the room (i.e. wireless local area networks, portable phones on the same frequency, even microwave ovens). MartinLogan engineers included an integrated RF power amplifier that provides a 15 dBm RF power level to reduce interference. Stray RF interference is also reduced through use of Adaptive FHSS operation.

40' Range: In a typical room situation, the SWT-2 receiver/transmitter combo has a maximum unobstructed operating range of 40' (12.5m) depending on placement of course. If desired, its compact dimensions allow it to fit neatly into an audio/video rack.

RCA Connectors: Both the wireless transmitter and wireless receiver are fitted with stereo RCA jacks. The wireless transmitter plugs into the sub or LFE output of your home receiver or active soundbar speaker via stereo RCA (cable not included). The wireless receiver plugs into the sub or LFE input on your powered subwoofer via stereo RCA (cable not included).

AC Power Adapters: The SWT-2's receiver and transmitter include an AC power adapter which will need to be plugged into an AC wall outlet.

  • Input: 100-240V ~ 60/50Hz, 1.5A
  • Output: 5V-1A

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Flexibility in subwoofer location [ Guest  Mar 31, 2018 ]
Had good reviews. I trust Crutchfield to stand behind product if I have issues. [ Jerry  Mar 27, 2018 ]
It was the best rated one and I like Martin Logan products. I think there is good quality in there products [ JERRY N  Mar 12, 2018 ]
I have researched many wireless receiver/ transmitter devices for powered subwoofers and the Martin Logan has the most consistent positive reviews. I also wanted a device(s) that did not have to be in "Line of Site" of each other. I'll let you know after some time how it performs! [ Quentin  Dec 28, 2017 ]
Good reviews from previous buyers and it's a Martin Logan! [ Robert  Nov 06, 2017 ]
Positive reviews [ JOHN  Oct 15, 2017 ]
Need to connect my sub wirelessly. Researched LOTS of other options, and this one had the best reviews, by far! Wanted quality, dependability, and ease of use. [ Wm  Jul 31, 2017 ]
Only option, though overpriced, that seems to be available and have consistent positive reviews about performance. Arguably should be about a $50 item given what it really is. [ David  Jul 23, 2017 ]
I chose this hoping it works better than the rocketfish item it will be replacing. If not, I'll be returning this as well and pulling a cable [ Paul  Apr 18, 2017 ]
Looking for high quality wireless subwoofer adapter and impressed by number of positive reviews VI's a VI's other options. [ Charles  Mar 26, 2017 ]
Move my sub [ Rod  Mar 24, 2017 ]
It should solve a problem with subwoofer placement. Reviews are good so we will see for ourselves. [ Craig  Dec 21, 2016 ]
Again, bought this a couple years ago. I needed them to hook up the Definitive sub woofer I bought. [ MARK  Nov 29, 2016 ]
Just installed wood flooring and the sub woofer is in the back...have to go wireless [ James  Mar 19, 2016 ]
ML makes good quality speakers and I needed the wireless adapter for a high quality sound system. [ CHARLES  Mar 10, 2016 ]

3 questions already asked

Good question.. I set mine up completely out of sight of each other and it works great. The sender is behind a glass panel and the speaker is behind a chair. I didnt try putting it inside a cabinet though... [ Peter  Dec 28, 2017 ]
Mine is the line of sight. But I believe the components can be hidden behind cabinets etc and still work as long it is not Metal Cabinets to interfere with the transmitted signals. [ DAVID  Dec 28, 2017 ]
No they don't have to be in site. [ RAMAN  Dec 28, 2017 ]
The transmitter and receiver do NOT have to be in line of sight to function properly. The transmitter can be placed in a cabinet and still function without delay [ SHAYNE  Dec 28, 2017 ]
One of ours is inside the cabinet and the other i velcrowed to the back of the sub. Paired it once and they are not in line of sight. Works like a charm, a bit pricy but worth not having to have it hard wired. [ Ted  Dec 28, 2017 ]
Line of site is not needed. For ours, the transmitter is inside a cherry cabinet, th receiver is behind the subwoofer; which is about 15' away. Works great! [ Lisa  Dec 28, 2017 ]
Not sure mine are not really in line of sight and still work but not behind a cabinet [ Roger  Dec 28, 2017 ]
Don't need to be in line of sight. I have them hidden, work perfect [ Nikunj  Dec 28, 2017 ]
I used a high quality, standard audio cable and it works great. This is an audio signal that you are transmitting, so you want to use something reasonably high quality, but it doesn't have to be over the top. [ Thomas  Dec 15, 2015 ]
I really don't think you have to spend a great deal of money. I would say middle of the road will do. [ Tyrone  Dec 15, 2015 ]
Sorry, I don't know. Mine is solely connected to the TV. [ Jona  Jan 16, 2014 ]
I'm not sure, but think you would be able to double the available subwoofer connections by connecting RCA "Y" connectors onto both RCA outputs on the receiving wireless module that essentially would double the available subwoofer connections. I'm sure Crutchfield or a local electronics store carries the RCA "Y" adapter. Good luck. [ GARY C  Jan 05, 2014 ]