Parts Express TriTrix MTM TL Speaker Components And Cabinet Kit Pair

The TriTrix MTM TL speaker design is hailed by DIYers as one of the best reasons to build your own! Never before has a speaker kit made such an impact in the DIY speaker building community.
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List Price$399.99
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Part # 300-702
  • Low price - proven performer
  • Assembly made easy via comprehensive manual
  • How to videos explain it all from start to finish
  • Kit includes everything you need to construct two complete speakers

Product Details

Parts Express TriTrix MTM TL Speaker Components And Cabinet Kit Pair

The TriTrix MTM Transmission Line Speaker Kit includes all the components you need to build a pair of the renowned TriTrix MTM speakers. Nearly $400 worth of components and cabinets have been discounted to almost HALF of the original combined price to save you money and get you started in speaker buildling. The knock-down TriTrix MTM transmission line (TL) cabinets save you time and money.

This kit's precision CNC cuts offer accuracy comparable to the craftsmanship of a master woodworker, maybe even better! 3/4" MDF construction ensures maximally damped enclosures to prevent annoying resonances that color the sound. Cabinets ship unassembled, but are simple, quick, and easy to put together. The TriTrix knock-down cabinet pair and the TriTrix component kit have been tremendously popular with Parts Express customers like you. Buy these two great kits bundled together and save!

Check out the review from Make Magazine: TriTrix

Package Includes:


Qty Part Number Description
2 275-075 Dayton Audio DC28FS-8 shielded silk some tweeters
4 295-302 Dayton Audio DC130BS-4 classic shielded woofers
2 266-836 2.50mH 18 AWG air core inductors
2 266-818 0.60mH 18 AWG air core inductors
2 027-428 Dayton Audio DMPC-10 10uF-250V polypropylene caps
2 027-436 Dayton Audio DMPC-20 20uF-250V polypropylene caps
2 004-2.4 Dayton Audio DNR-2.4 ohm 10W resistors
2 091-1154 Gold binding post pairs
2 260-317 Acousta-Stuf Polyfill 1 lb. bags


Note: Crossover parts and speaker terminals may be substituted for comparable parts at any time. 

User Submitted Images


TriTrix user image 001 Harold H.
from Lynchburg,VA
TriTrix user image 002 Anonymous Customer
Dave T. TriTrix Dave T.
from Madison, NJ
Granite TriTrix David E. 
from Salt Lake, UT

Parts Express TriTrix MTM TL Speaker Components And Cabinet Kit Pair includes the following items:
Qty Part # Item
1300-700TriTrix MTM TL Components Only Speaker Kit Pair
1300-701Parts Express TriTrix MTM TL Knock-Down CNC Speaker Cabinet Pair
No substitutions allowed. The above may include some items that are not available for purchase separately.

Product Specifications
  • Cabinet OptionsUnfinished/Unassembled
  • Speaker TypeFloor Standing
  • Woofer Diameter5-1/4"
  • Input Rating8 ohm
  • Configuration2-way (MTM)
  • ColorUnfinished
  • Cabinet Dimensions (H x W x D)36" x 7-1/2" x 14-1/4"
Parts Express TriTrix MTM TL Speaker Components And Cabinet Kit Pair
  • BrandParts Express
  • Part Number300-702
  • UPC844632084331
  • Product CategorySpeaker Kits
  • Unit of MeasureEA
  • Product Rating
    (62 Reviews)
  • Weight83.1 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

View similar products to the Parts Express TriTrix MTM TL Speaker Components And Cabinet Kit Pair
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Parts Express TriTrix MTM TL Speaker Components And Cabinet Kit Pair
Parts Express TriTrix MTM TL Speaker Components And Cabinet Kit Pair is rated 4.6935 out of 5 by 62.
Rated 5 out of 5 by from Better than expected..Just finished these speakers, tested them last night and they sound great. Very accurate sound stage, It was like hearing many of the recordings for the fist time. Highly recommended.
Date published: 2015-04-08
Rated 5 out of 5 by from Best bang for the buckI was searching for speaker to compliment my TV setup and to free up my Atlas in order to run the Atlas over tube amps only. The MTM TL are not efficient enough to run lower powered tube amps.Since I was always interested in different base setups a transmission line was a welcome experiment and I'm not diappointed. Easy to build and wire. Only issue is the crossover which does not seem to have a real place in the speaker cabinet it self. Putting it inside would mean to never get to it in order to recap it in 10 years or so.Since the inside of the cabinet is pretty limited for the crossover I build footings to acommodate them. This also lifts the tweeter a little bit more to ear level which helps a lot with the somehow dull high frequencies.Not sure, some people are complaining about the missing bass SPL, for me, they have a little bit too much compared to the mids and highs. They need a lot of distance to the back wall or the one-note bass becomes too boomy. I experimented with stuffing and I think I need to stuff more in order to control the bass lines better when listening to music.For my main application as TV speakers they are perfect since voice definition is very good but for movies also here the boomy bass needs some work.In general I would consider the high frequency definition a little weak but maybe I'm spoiled by my Atlas which are now only be used for music and have an advantage here, so that might be unfair.In general, pretty darn good speaker, easy build and when you know what to do with the crossover a very nice setup. Can't beat the price for what you get!!!
Date published: 2015-04-05
Rated 5 out of 5 by from A MUST for First-Time BuildersI bought this kit several years ago as my first speaker build. It is a simple, elegant design, that is easy to follow; and a great introduction to the speaker building world. I can't recommend enough building a pair like this before designing your own.I was completely blown away with the sound for how much they cost. In the end I have some EQ in the mid section, but I am satisfied with the sound overall. And don't forget the extended bass you get with a well-designed transmission line!The only thing that almost brought it down to 4 stars was that 2 of the internal corners (the 45 degree pieces for the TL) were ~1/16" wider than they should have been. The support staff had a hard time believing me since the pieces are CNCed, but they were definitely a bit out of tolerance, enough to make the box not seal properly. I ended up just slowly shaving them down until they fit properly.Since then, I have designed a few speakers from the ground up. I have been a live sound professional for several years; but I must admit that without building (and understanding) this kit first, I would have been in over my head.And no, speakers do not just have to be painted black.
Date published: 2015-02-28
Rated 5 out of 5 by from Nice sound! Not too easy for a newby though.First off....I am a complete amateur when it comes to speakers. This was my first time to do a project like this with no wiring or wood working experience. My can't have too many wood clamps....I had four and needed more. The instructions are poor but the online how to videos are a great help. The finished product....I'm happy and the sound is great for the money! I almost want to buy another set just to do a better job the second time around.
Date published: 2015-02-09
Rated 1 out of 5 by from $250 in the trash.see photo, after I glued on one side, I realized I had not installed the "T-nuts"...
Date published: 2015-01-16
Rated 5 out of 5 by from Even better than expected.I got these after reading the many glowing reviews on them. I've never built a speaker before and I figured that it would be fun. It was a very straight forward process thanks to some easy to find crossover schematics (thank you Google). The cabinets went together very easily and the crossovers were a snap to put together. As for the sound, I don't think it can be overstated how good these speakers are. Especially when you consider the price. They play quite clean and can get very loud. As others have said they put out a decent amount of bass, but adding a subwoofer really helps round out the lower end. I have these running in stereo mode on a Denon AV-890 receiver, teamed with a Bic F-12 subwoofer for anyone who is interested. Could not be happier with the F-12 as well. Going to have to get started on the Tritrix center channel now. A kit for that would be nice as well....hint hint Parts Express.
Date published: 2015-01-13
  • 2015-10-13T06:49CST
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Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email  for a prompt reply.
Parts Express TriTrix MTM TL Speaker Components And Cabinet Kit Pair

Wouldn't the poly fill interfere with the function of the transmission line? Where is the best place to load it?

Asked by: Gnagus
The poly fill is a function of the line. It is stuffed evenly from the back of the drivers to the opening of the terminus. You can play with different amounts to achieve the sound you like.
Answered by: MattP
Date published: 2015-09-30

I am just completing my tritrix speakers - but I have no idea on what I will do for a center channel.  I would prefer to build this to....please advise on any input as to a good center speaker option.   Thank you.

Asked by: Scottytola2
We don't have a kit available, but you can build a matching center channel for these with essentially half of the parts. You can see the plans at the website below.
Answered by: MattP
Date published: 2015-09-09

Any specs about frequency response and SPL?

Asked by: lucpla
Average sensitivity for this system will be about 87 dB. Frequency response is ~50-20kHz.
Answered by: MattP
Date published: 2015-08-05

Hi, do you have any sensitivity figures for the speakers?

Asked by: Royal
The sensitivity of the speakers are about 90 dB.
Answered by: MattW
Date published: 2015-04-20

I see power handling is estimated to be 60-75 watts RMS & roughly 87dB@1W/1M. What would be the approximate increase in wattage w/high-pass filtering set to 80Hz? (On an Onkyo TX-NR818, 135W/ch RMS, and a Dayton Sub-120 for LFE)

Asked by: B Chilson
There is no increase in actual power handling, just an increase in output capability. With a high pass at 80 Hz these will run into thermal issues before they reach mechanical limits, but I suspect they will be quite loud at this point. I doubt you will ever use the full power potential of the receiver.
Answered by: MattP
Date published: 2015-02-27

What size amp do i need , also my room is 20 by 14 ,are they big enough or need something stronger ? Thank you

Asked by: emik33
Any amp that is 50-100 watts RMS will work fine with these speakers. They should fill that room easily, but whether it is enough for volume levels you may like to listen to is impossible to say.
Answered by: MattP
Date published: 2015-03-11
  • 2015-10-13T07:38CST
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