For the Overnight Sensations’ driver arrangement, Paul selected the versatile Dayton Audio ND20FA-6 1.91cm neodymium silk dome tweeter and mated it to the attractive HiVi B4N 10cm aluminum midbass woofer. To extract as much bass as possible, Paul decided upon a cabinet size of roughly 0.16 cubic feet (4.5 liters) which is tuned to 53 Hz using a 3.5cm diameter port that is 15.2cm long.SoundImports and third parties use cookies on this website. By clicking “Yes, I agree 🔉;” you agree to store cookies on your device to improve website navigation, analyze website usage and help our marketing projects. If you give us permission, we use your personal data for personalized and non-personalized ads. Want to know more? Read all about our cookie policy here. If you choose to decline, we will only place functional cookies.
When Paul Carmody first listened to the Overnight Sensations speakers that he designed he exclaimed, “I wish I had a time machine. I would go back to my bedroom when I was in Jr. High or High School and give these to myself. These are the little bookshelf speakers I imagined I had: huge soundstage, deep bass, and tiny box. In reality, back then all I had were some impish Minimus-7s.”
Are you a business buyer and are you interested in higher quantities? Contact us via this form and receive a tailor-made offer. Let us know in the field below what numbers you want, whether this is a one-off and what your application is. We will respond within one business day.The Overnight Sensations are designed to be a quick, economical build that can put out a surprisingly big sound in a small box. Could be a weekender project for an addict, a gift for a teenager (see above), or—in Paul’s case—a set of small, full-bodied monitors that he could listen to while grading papers.
To start a do-it-yourself’er off right, this kit includes a pair of high-grade 1.27cm Baltic birch cabinets that have been precisely CNC cut and rabbeted for perfect fit-and-finish when assembling the cabinet, as well as perfect driver fit.
This kit includes nearly everything you need to build a top-notch pair of speakers in no time flat, including: a pair of knock-down cabinets, drivers, ports, and crossover components.
Build your own high-end near-field monitors with the highly regarded Overnight Sensations MT speaker pair kit designed by Paul Carmody. This kit includes nearly everything to build a pair of speakers, including: a pair of knock-down cabinets, drivers, ports, and crossover components.
Now, for a true labor of love. These were built by [pcmofo] to match the look of his Apple gear. These were painstakingly made, and the end results are flawless. The build logs are here and here.
The overall sound quality of the MTM version of the Overnight Sensations is similar to the original TM. The sound is big, and they sort of pick up where the TM version leaves off. Where the TM version does its best work in a small room, the MTM version can easily rock the walls in such a room… and might be better suited to a medium-sized room. They still work as desktop speakers, and will have a nice, immersive soundstage, but please be careful with your hearing–and be respectful of those whose desk is near yours. These things pack a bit of a party.Also, for those who like the ease and comfort of having someone else design a circuit board for you (and who doesn’t?). Printed Circuit Boards are available on eBay–as they are for most of my other designs as well.Want to see an intimidating build? Take a look at Tim K’s version, which features curved cabinets and matching stands. The cabinets were created using a “translam” technique, and all the pieces were cut by a CNC machine. The veneer is tiger-striped maple dyed with a gray alcohol-based aniline dye.
The question was bound to come up eventually: can the OSMTM be built in a transmission line enclosure? Sure, but someone else would have to design the enclosure. [bungelow_ed] was up to the task. Well, once someone got the ball rolling with transmission lines, [Carrick1973] joined in and did a very impressive build featuring a “hexagonal” cabinet. The attention to detail really shows. Now, for a bit of help with the layout of the crossover, I made a little drawing to show how I did it. My goal was to fit everything onto a 3×6 inch piece of pegboard, which makes mounting the whole thing on the back of the enclosure more feasible.
Part of the magic of the Overnight Sensations series is in the drivers. The HiVi B4N can put out deceivingly-good bass in a very small enclosure, and the price is very reasonable. They also have quite a bit of power handling; I have pushed the MTM version here with program material to 99 dB with no problems. The Dayton ND20FA-6 is also a special little driver; for the paltry price of $8, any other tweeter would sound like hissy, airy, or sibilant trash. The ND20 plays very clean. It’s downfall, in my opinion, is that it’s not the easiest tweeter to work with. Small changes in filter values cause large changes in Frequency Response; shaping its response takes time and patience. The end result is worth the work, though. For less than $125 in drivers and parts, you get a speaker that will sound like a much larger speaker that cost several times more.The enclosure could be lined with convoluted foam, which is pretty standard for a vented design such as this. In my case, to keep things simple, I did not line the enclosure at all. Instead, I used a few light handfuls of polyfil behind the woofers (the internal braces sort of held it in place). As I told many people who built the original Overnight Sensations, getting the right amount of stuffing takes a bit of experimentation. I find the best results when I over-stuff a bit, then gradually take some out, listening each time. I know when I get the right sound; the speaker suddenly just sounds “huge.”
I know what you’re thinking: there aren’t enough speakers built out of tongue-and-groove hardwood flooring. Enter the “Bamboo Chopsticks.” Check out some great build pics here.
The idea here is to take the heart of the Overnight Sensations (big sound, small box, cheap price), but increase power handling and efficiency by adding a second woofer. The results should be quite satisfying and surprising to those who choose to build it.Please note that the Frequency Response is modeled below 300 Hz (gray line) because I used gated MLS measurements. I do this for some of my designs to give people a better idea of what the true bass response would be.
Wiring a second woofer in parallel gives us a few advantages: most importantly, the speaker is 6 dB louder (twice as loud), which also means the speaker will go 6 dB louder than its TM counterpart. There’s a catch, of course. The impedance of the speaker is now cut in half. This means that you may need a more robust amplifier to drive it. Will your amp run these? I can’t guarantee. If it’s rated for 6 Ohms or lower, you’re fine. Also, most chip amps and digital amps will have no problem running this speaker… this means that the Overnight Sensation MTM might lend itself very well to a compact “plug-and-play” system, where a small amp is incorporated into the speaker itself. All the user would need to do is plug in his source (iPod, computer, etc.) and boom, they’re putting out tunes at a volume that might actually cause neighbors or family members to bang on the wall to turn it down.
The woofer circuit is 2nd order electrical, with the .22 uF capacitor acting as a notch filter to eliminate the god-awful breakup of the B4N, and the 1.5 Ohm shunt resistor contours the midrange response a bit. The tweeter’s filter is 3rd order electrical, with the 10 Ohm series resistor acting as attenuation. The crossover point is around 3500 Hz, and the acoustic slopes are … none of your damn business 🙂 Let’s just say they’re “not easy to categorize.”
Next is a build from England. This was built by [BIKeSEAT] over at HTGuide forum. It’s a 5.1 surround system using all OSMTM. One of them is on it its side for a center channel–he changed the dimensions slightly to keep enclosure volume the same (yes, it’s Kosher). He finished the speakers in White Oak veneer. To complete the set, he added a Swope sub. Looks like it blends very well into the decor! His build log is here.
The MTM version of the Overnight Sensations has an internal volume of 9 Liters. It can be built with either 1/2″ or 3/4″ stock. The trade-off is thus: if you use thinner stock, you get a smaller, lighter box, but you will need to do at least two internal braces; if you use thicker stock, the cabinet will be less resonant and may not require any bracing at all, but the box will be slightly larger and heavier. It’s up to you. Either way, you will need two “handypanels” (2′ x 4′) of MDF to build a pair. You can get creative with the box if you put your mind to it. I could easily envision these being made into tall and slender “sticks” like those sold with HTiB sets at the big box stores. Turning the design into a tower would mean simply having a hollow compartment in the bottom, which you could fill with ballast if desired.
Just as with the TM version of the Overnight Sensations, you can use this 1 3/8″ ID Adjustable Port available from Parts Express. Simply glue the sliding portion so that the total vent length is 6″. These are easy to mount and give a clean, professional look.
I tried to keep the aesthetics of the MTM version the same as the TM version. The cabinet width is still 6″ an the tweeters are still offset–although this time it was done mostly to allow the woofers to be as close together as possible. The drivers are still surface-mounted, but feel free to flush mount them if you like. I kept the cabinet depth pretty shallow so that the speaker would have a small footprint. This created a quirky scenario with the vent tube, though: that is, a single 2″ or 3″ diameter vent tube would be too long to fit horizontally inside the cabinet, so I used a “dualie” configuration: two 6″ lengths of 1.375″ diameter tubes (AKA: 1.25″ SCH 40 PVC). If you like the look of vents on the front, you could mount them there instead.
For a sense of scale, this is a photo of the Overnight Sensation MTM next to the venerable Dayton III, my first DIY build. While the DIII is a fun speaker, the Overnight Sensation MTM has a definite upper-hand in terms of midrange quality, and treble quality for that matter. The DIII may have a few more Hz bass extension, but at the cost of a significantly larger box. (Don’t get me wrong. I have nothing but love and respect for Wayne Jaeschke and his designs.)Seems my tower idea got a couple of people inspired. First is a tower by [mtbboyz]. The veneer is cherry with red chestnut stain. He gives additional details here and here.
First up is [WWWJD] from the PE board. You may remember his phenomenal version of the Overnight Sensation TM with the curved cabinets. Well, he’s one-upped himself with this build. He did curved cabinets using thin plywood bent over an MDF frame, then veneered with some beautiful Sapele veneer to match his homemade gainclone amp (under the desk lamp).
I should also add that this vent from Parts Express has been used by some builders. Due to its reduced diameter, the stock length of 4″ is actually right on-target, so no cutting is required. The downside of this vent is that it’s pushing the limits of port velocity. However, there are several very nice builds of the Overnight Sensations out there that use this port, so it must be OK.I only regret not putting this design together sooner, because over the years I’ve seen people wish to build something from the Overnight Sensation series, but wanted something floorstanding, or with just some more bass to fill a medium-sized room. For everyday listening in a small space on a budget, I think this thing is a home run.
The good news is that since there is so much internal cabinet space, you can lay out the crossover pretty much however you want. Hell, you could even just lay out each filter exactly how it is on paper, if you are uncomfortable with Nodal Analysis.
I wanted to keep the same general layout and dimensions as the original Overnight Sensations and OSMTM so that a family resemblance would be instantly apparent if these were placed in the same room as the originals. The Width is still 6″, and the depth still relatively shallow. The nice, tall height gives us something we’ve never gotten to play with on the B4N: internal volume. Note: this is not a Transmission Line; it’s just a simple, vented enclosure. I just drew up a shape I liked and designed around that. If someone wants to design a TL enclosure for this, be my guestThe impedance load of this design would probably be considered 4 Ohms nominal, however it just barely dips down there, and on the whole should be pretty benign for most solid state amps and home theater receivers. It’s no worse than the OSMTM.
As might be expected, the crossover to the Overnight Sensation TMM is a 2.5-way, which means that it’s basically a 2-way, but with an extra large inductor before the 2nd woofer to push its FR lower so it doesn’t interfere with the tweeter. (eg: it just plays the low notes) The actual topology of this design actually closely mimics the that of the original Overnight Sensations. It still uses a 2nd order with a “tank/elliptic” filter on the woofer, and a 3rd order with an L-pad on the tweeter.
What? You mean I’m not done with the Overnight Sensations? OK, so here’s the story. Back when I designed the Overnight Sensation MTM, I knew some folks were going to want to make towers out of them–and there are plenty of excellent examples out there. However, my mind would always play around with the cabinet shape, wondering what else was possible. For some reason TMM towers are almost always more pleasing to my eyes than MTM towers; maybe they create less visual impact in the room, maybe they look less like they might tip over, maybe I can just sense the Spouse Approval Factor. Everyone who’s heard the original Overnight Sensations always thought to themselves, “Well, the bass is pretty good, especially for a speaker this small.” So what happens when that same speaker isn’t quite so small anymore? What kind of bass you think you could get? Yeah, the bass is pretty sweet on this. The F3 is around 39 Hz, but I voiced it with a just a hint of extra boom in the low bass because it kind of kept with the same sound as the rest of the Overnight Sensations family. You will be pleasantly surprised when a synth bass line comes in and you feel it. Personally, I wouldn’t feel the need to use a sub with these, unless I was watching a lot of action movies. The mids and treble are right in-line with the rest of the Overnight Sensation family. TMM are certainly no panacea though, and in my opinion are much harder to get right in the crossover. However, I don’t mind the challenge once in a while, and I have always been curious what kind of deep bass I could get out of the B4N if they had a lot more cabinet volume to play into. So I decided that the only way I could sleep at night is if I finally just tried this design for myself. And I’m so glad I did. What a fun way to round up this series!The internal volume is approximately 21 Liters, and there are 2-3 “windowpane” braces here and there. The vent is 2″ diameter, and 3″ long. This tunes the speaker to 50 Hz, and should give an F3 around 39 Hz. The vent is about 5″ up from the bottom of the cabinet, and can be placed on the front or the back, depending on which you like the look of. The cabinet can be built with either .5″ or .75″ stock. I used a medium-light fill of polyfil in the top 2/3 of the cabinet.
Please note that there are two versions of the crossover. One uses the HiVi T20 tweeter, and the other uses the Dayton ND20FA-6. The sonic difference between the two is negligible; I offer both tweeter choices because I know that certain tweeters are only available in certain areas.
The frequency response is slightly mid-forward with a bumped bass and lowered treble, creating a warm and detailed filled sound. Soundstage depth and bass extension are pretty good for small speakers, and a smooth response paired with hifi tuning provides occasional flashes of brilliance in a small package.Listening to Rush’s YYZ, I find myself bobbing my head and enjoying the sound despite its shortcomings. These are probably the bare minimum for speakers that I’d consider listening to regularly, but at the price point, I think that’s a tremendous compliment to these speakers. What a great kit despite the price bumps in the past year or two.
I’ve built about 5 pairs of overnight sensations for or with people. These speakers are one of the best
entry level DIY speakers because the overnight sensations are at an entry-level price point with enough bass extension to be a standalone while providing an entry-level audiophile sound in a reasonable size.
Highs – Definitely tuned lowered, and they perform barely well enough to be acceptable. It’s crisp and fast enough, but it’s lacking sharp crispness and detail.The woofer is small, so you might want to leave the front baffle for last. Stuffing is definitely required. For tweeter installation, just push really hard. Here is the xover layout I like to use. I obsessively spend countless hours researching about and indulging in my one too many hobbies, and you’ll find my thoughts about them here. During the day, I’m a data scientist working out of a cafe in Brooklyn. Bass – Its got a bumped bass with decent extension in many tracks, so you could probably throw a decent house party with them; however, the bass is a bit loose and muddy in certain tracks, which is the consequence of the woofer trying to do multiple jobs.While the overnight sensations have some noticeable shortcomings, it’s a pretty solid performing speaker in a small package. Most commercial bookshelves at this price range lack bass response, good mid-performance, and no depth. The speakers are also pretty small, which is a huge factor for a lot of people.
Mids – Smooth and natural sounding, but it does sound a bit hollow at some parts. Listening to Amy Winehouse, there’s a lot of detail and the voice really comes out, but it’s the opposite for Diana Krall tracks. This is probably the result of the mids having a slightly uneven response. For my build I chose to assemble the crossover first and mount the PCB on the bottom panel. The Dayton caps are solid and work perfectly well here. I prefer Mills wirewound over sandcast resistors, they’re worth the extra if you can swing it, and I had a pair of surplus Mundorf capacitors for the 0.22uF position, but sticking with all Dayton caps is fine too. This is a budget build so you won’t get too much yield from bumping up the parts quality. The interior of the other panels is adorned with Dynamat-like sheets for internal damping. There are plenty of brands out there at different price points, but try to get thicker ones for the purpose of adding mass. I personally like to use a staple gun to really keep the sheets on there. Not necessary, but low cost insurance they won’t move. It’s important to not completely cover the panels as wood glue, then later caulk will be used to ensure all the corners of the cabinets are sealed. In this post I’ll be building Paul Carmody’s Overnight Sensation DIY speakers from a kit. The Overnight Sensations are an extremely popular DIY bookshelf speaker for a few different reasons. One, cost; they are a mere $120-140 a pair at the time of this writing. Two, they sound great. It’s hard for me to recall hearing such dynamic sound from a diminutively sized form factor. Three, the build is super easy. If you have some basic tools and know how to solder, you’re all set. This post is going to be written for a beginner in mind, so if you are already experienced feel free to skip along.Plenty of DIY electronics and reviews including vacuum tube audio, new and vintage gear, custom audio cables, headphones, experiments, and retro video gaming.
If you’d like to add internal fill, now is the time to do it. I used two handfuls of fluffed Acoustastuf per speaker. The drivers can now be soldered in and placed. The HiVi mid-drivers come with foam surrounds that stick in place, be sure to use these for a good seal. The tweeters will require a little bit of effort to do right and should be handled carefully. First, if any paint or stain ended up in the cavity for the tweeter, you may need to lightly sand to ensure clearance as the fit is very tight. The tweeters do not include a foam surround so a very thin layer of caulk should be placed between them and the wood cabinet to create a seal. On the back the binding posts can be soldered and the plate can be drilled in place.Given I hardly have time for personal projects these days, getting the finish done quickly is a major boon. I like to use a product called Duratex from Acry-tech. This is a paint that’s similar to truck bed liner and covers up any surface imperfections with a texture. It dries quickly (about 3 hours) and provides a durable finish. Two to three coats are all that is needed and there is no sanding required between coats. Because these speakers will be in my workroom, there isn’t much point in giving the speakers a museum grade finish, but the Duratex looks nice and is very serviceable. You can either buy Duratex from Partsexpress or directly. Custom colors are available direct, like this nice bright orange.For my assembly, I found a set of crossover PCBs on eBay which I believe are made by DIYSoundGroup. They are very reasonable, and I highly recommend them as they make things so much faster and easier than drawing out the arrangement from the schematic, figuring out a good layout, gluing the parts in place and then wiring everything point to point.To start a do-it-yourselfer off right, this kit includes a pair of high-grade 1/2″ Baltic birch cabinets that have been precisely CNC cut and rabbeted for perfect fit-and-finish when assembling the cabinet, as well as perfect driver fit.For the Overnight Sensations’ driver arrangement, Paul selected the versatile Dayton Audio ND20FA-6 3/4″ neodymium silk dome tweeter and mated it to the attractive HiVi B4N 4″ aluminum midbass woofer. To extract as much bass as possible, Paul decided upon a cabinet size of roughly 0.16 cubic feet (4.5 liters) which is tuned to 53 Hz using a 1-3/8″ diameter port that is 6″ long.
This kit includes nearly everything you need to build a top-notch pair of speakers in no time flat, including: a pair of knock-down cabinets, drivers, ports, crossover components, binding posts, screws, and wire.
The purpose of this test is to illustrate how much (if at all) the output changes as a speaker’s components temperature increases (i.e., voice coils, crossover components) instantaneously.
Measurements are provided in a format in accordance with the Standard Method of Measurement for In-Home Loudspeakers (ANSI/CTA-2034-A R-2020). For more information, please see this link.The below graphic indicates just how much SPL is lost (compression) or gained (enhancement; usually due to distortion) when the speaker is played at higher output volumes instantly via a 2.7 second logarithmic sine sweep referenced to 76dB at 1 meter. The signals are played consecutively without any additional stimulus applied. Then normalized against the 76dB result.
When Paul Carmody first listened to the Overnight Sensations speakers that he designed he exclaimed, “I wish I had a time machine. I would go back to my bedroom when I was in Jr. High or High School and give these to myself. These are the little bookshelf speakers I imagined I had: huge soundstage, deep bass, and tiny box. In reality, back then all I had were some impish Minimus-7s.” The Overnight Sensations are designed to be a quick, economical build that can put out a surprisingly big sound in a small box. Could be a weekender project for an addict, a gift for a teenager (see above), or—in Paul’s case—a set of small, full-bodied monitors that he could listen to while grading papers. To start a do-it-yourselfer off right, this kit includes a pair of high-grade 1/2” Baltic birch cabinets that have been precisely CNC cut and rabbeted for perfect fit-and-finish when assembling the cabinet, as well as perfect driver fit. For the Overnight Sensations’ driver arrangement, Paul selected the versatile Dayton Audio ND20FA-6 3/4” neodymium silk dome tweeter and mated it to the attractive HiVi B4N 4” aluminum midbass woofer. To extract as much bass as possible, Paul decided upon a cabinet size of roughly 0.16 cubic feet (4.5 liters) which is tuned to 53 Hz using a 1-3/8” diameter port that is 6” long. This kit includes nearly everything you need to build a top-notch pair of speakers in no time flat, including: a pair of knock-down cabinets, drivers, ports, crossover components, binding posts, screws, and wire.Early Reflections Directivity Index (EPDI): is defined as the difference between the listening window curve and the early reflections curve. In small rooms, early reflections figure prominently in what is measured and heard in the room so this curve may provide insights into potential sound quality.
These speakers were sent to me by Parts Express. I was not paid for this review; however, I believe Parts Express is unlikely to ask for this stuff back since it’s a DIY build.All data collected using Klippel’s Near-Field Scanner. The Near-Field-Scanner 3D (NFS) offers a fully automated acoustic measurement of direct sound radiated from the source under test. The radiated sound is determined in any desired distance and angle in the 3D space outside the scanning surface. Directivity, sound power, SPL response and many more key figures are obtained for any kind of loudspeaker and audio system in near field applications (e.g. studio monitors, mobile devices) as well as far field applications (e.g. professional audio systems). Utilizing a minimum of measurement points, a comprehensive data set is generated containing the loudspeaker’s high resolution, free field sound radiation in the near and far field. For a detailed explanation of how the NFS works and the science behind it, please watch the below discussion with designer Christian Bellmann:
I also used the PCB designed by Matt Grant. It can be purchased for about $18/each through his eBay store. Just google “Overnight Sensations PCB” and you should have no trouble finding it. If you’re on a tight budget it’s not necessary but it is quite helpful and makes things extra tidy if you’re a mess like me.
Sound Power represents all of the sounds arriving at the listening position after any number of reflections from any direction. It is the weighted rms average of all 70 measurements, with individual measurements weighted according to the portion of the spherical surface that they represent.As stated in the Foreword, this written review is purposely a cliff’s notes version. For details about the performance (objectively and subjectively) please watch the YouTube video. But a couple quick notes based on my listening and what I see in the data:
Also note the bottom section of this review will have some additional stuff that you might be interested in with respect to the DIY aspect of this speaker and verification of the completed speaker’s results.
The review on this website is a brief overview and summary of the objective performance of this speaker. It is not intended to be a deep dive. Moreso, this is information for those who prefer “just the facts” and prefer to have the data without the filler. The video below has more discussion.Sound Power Directivity Index (SPDI): In this standard the SPDI is defined as the difference between the listening window curve and the sound power curve. While I am not providing my own crossover suggestions, you can find discussion on this in my Facebook group (link at the bottom of this review). Additionally, I also have a link to the raw data should anyone be interested in trying their own hand at simulating the crossover and possibly making tweaks. That data can be found here (dropbox link). Just make sure you flip the polarity of the tweeter in the simulation! Long story on why the polarity is wrong… but just make sure you don’t forget to do that! Once my testing of the completed speaker was finished I then disconnected the crossover and measured the response of the individual drivers (while still attached to the cabinet). Using KLIPPEL’s Near Field Scanner “Export” module I then exported the magnitude+phase of each driver as a text file (360° vertical and horizontal in 10° increments). I imported those files to VituixCAD along with the impedance phase+magnitude and used the crossover schematic provided by Parts-Express to verify the performance and then to tinker a bit to see if I could improve the crossover and overall performance. You can see this matches nearly perfectly to the measured performance of the completed speaker with the differences being due to the real impedance vs the simulated impedance.
In general, cheap commercial speakers are going to be tough to match as they have economies of scale that’s not accessible by most of us when they buy a zillion of them.
The X-LS Encore is a bit bigger, but has a similar impedance to the first two speakers. The TriTrix is smaller and has an impedance of 6 ohms, less than the other speakers, and therefore the electrical signals flow better through it.
Audio DIY gained popularity in the 1950s and 1960s. Audio reproduction was relatively new and complex, and in particular high performance equipment wasn’t offered at the retail level.This woofer provides a pretty impressive bass performance, smooth overall response, and a low price, it’s no surprise that it’s one of their more popular woofers.There are also boutique manufacturers that you can hire to help you with the detailing, but again if you’re on a budget it’s better to just do it yourself.
The biggest difference between the speakers is that the first two are in a more beginner category; they are easy to build and have good audio quality for the price.
The speakers feature solid MDF enclosure panels that are all CNC milled by Denovo Audio to tight tolerances ensuring easy assembly and feature a ¾” thick front baffle. It has an aluminum cone and a strong motor designed for low distortion, this woofer produces a strong bass tone while staying smooth through midrange frequencies. If you aren’t on a budget, maybe this is a perfect option for you! However, if you’re just starting out or just don’t want to fork over two thousand dollars for a speaker, DIY might just be the way to go for you.The knock-down enclosures include a center brace tying all sides together to minimize cabinet resonances. Recesses for flush mounting the drivers and the opening for the port are pre-cut, which makes the assembly even easier.
Curt Campbell designed the TriTrix, and when he did he did his best to search for drivers that would offer the best bang for their buck. For the woofer, Campbell selected the Dayton Audio DC130Bs-4 5-¼” Classic Series.
Kits and designs were available for consumers to build their own equipment. Famous vacuum tube kits from DYnaco, Heathkit, and McIntosh, as well as solid state transistor kits from Hafler allowed for people to build their own high fidelity systems.
The specified port component was an adjustable unit consisting of a flanged piece and larger extension component. The idea is that the port length can be chosen and glued into place at the desired length. Unfortunately the extension component was slightly too large to fit through the holes I had machined in my cabinet. My solution was to machine roughly 1 mm from the diameter on a lathe.
