GSG is moving to a new manufacturing facility
so that we can continue our growth in 2022!
Please note: the move, and ongoing intermittent inventory disruptions in drivers, amps, and lumber, are resulting in additional order processing time.
ATTENTION: BALTIC BIRCH IS AVAILABLE IN LIMITED SUPPLY
(FOR ALL BALTIC BIRCH ORDERS, PLEASE CALL OR EMAIL FOR CURRENT PRICING)
UNLESS YOU CALL OR EMAIL AHEAD OF TIME,
ALL BALTIC BIRCH ORDERS WILL BE FULFILLED IN MDF, INCLUDING:
BTS, DEVASTATOR 21 (HT version), MARTYSUBS, and G-SUB (Devastator 15).
GSG Customer's DIY Subwoofers
For more builds, discussions, pictures, and reviews, visit us at:
MARTYSUBS WERE A HIT FROM DAY ONE
Martycool007 (Audio forum member for whom the very first MartySub was designed and after whom it was named)
This sub is now playing loud & low! I am so impressed! ...I think that I will be ordering two more of these...for a total of 4!
Atabea (Audio forum member and builder of the original MartySub)
I just finished installing the driver and, of course, I had to give it a quick listen. One point: this thing is freakin scary!!
Donny (Audio forum member and builder of the original MartySub)
Now that I have had my MartySub broken in for a few days I can give my review. Lets start with WOW! ...bass is incredible. Chest thumping, pant ruffling, couch vibrating. Measured a couple of scenes and hit 115 db. It crushes it and is so effortless.
Mike H. (Audio forum member and builder of the original MartySub)
Yah, I'm lovin' having a capable sub in my system!
I was shaking all sorts of things in my theater/office/storage room.
W. R. (Audio forum member and builder of the original MartySub)
...the two MartySubs I have in my room are simply destructive beyond belief...
Sooly1 (Audio forum member and builder of the original MartySub)
To be honest..I guess I wasn't really prepared for the brutal power of this sub. I don't want to sound like a newb, but Jesus H Christmas story! When Hulk is jumping around from building to building in Avengers, and you can feel the impact of his punches, and when he screams and your clothes start to vibrate...like he's yelling in YOUR face lol. I can't wipe the grin off my face! ...long story short, un-freakin-believable!
Bring Home the BASS!
Everybody knows that powerful bass forms the foundation of great sound—for movies, music, and gaming experiences alike. And anybody who has shopped around knows that truly high performance subwoofers cost an arm-and-a-leg.
Responding to the high prices of commercial subwoofers, some folks have resorted to building their own subwoofers from the ground-up. These DIY (Do-It-Yourself) folks are not only saving a ton of money, but are (in many cases) dramatically outperforming “store bought” subwoofer brands in the process.
The challenge with DIY (Do-It-Yourself) subwoofers has always been that you needed to know how to design a subwoofer, then you needed a whole garage full of tools (circular saw, router, circle cutting jig, etc.). Even then, after all the sawdust has been made, the cuts might not all be perfect, so the final product might look, well, kind of home-made.
MartySubs by GSG change all this by combining the bang-for-the-buck of DIY with the high quality cuts achievable only on industrial-grade CNC machines, thus making commercial quality results achievable for folks on a DIY budget.
What is a Ready-to-Assemble Subwoofer (aka ”Flat-Pack”)?
Most folks are familiar with how much money they can save by purchasing and assembling “Ready-to-Assemble” (aka “Flat Pack”) home and office furnishings (we won’t mention the name of the Swedish company with the big Blue and Yellow sign that popularized this model).
For decades, DIY'ers have been assembling flat pack bookshelves, desks, file cabinets, coffee tables, and TV stands…we simply bring that model to subwoofers. In some sense, this is nothing new; it is a proven model. On the other hand, for the potential subwoofer buyer, this is nothing short of REVOLUTIONARY.
We have spent literally hundreds of hours designing the MartySubs by GSG in order to REMOVE ALL THE COMPLEXITY from the building process. If you can follow simple instructions, “Panel A goes into Panel B” type stuff, you can assemble a MartySub. It’s that easy.
NO COMPLICATED TOOLS!
NO EXPERIENCE…NO PROBLEM!
Precisely Engineered for Performance & Ease of Assembly
MartySub Flat Packs by GSG include all the panels (including internal bracing) necessary to construct your cabinet. All you have to do is glue it together according to the easy-to-follow instructions.
The panels include cutouts for the driver and the terminal cup (on the back--the cutout works for both the standard banana connectors as well as a pro-grade Speakon connector).
We’ve made extensive use of dadoes (aka guide channels) and other CNC machining techniques so the internals of your cabinet will be rock solid.
An additional benefit of the design is it will help keep your enclosure nice and “square” as you are putting it together. This not only helps to ensure optimal performance, but a professional look as well.
In order to complete your subwoofer, you will need a driver, an amplifier, and some other finishing items. To make it as easy as possible for the first time builder, we have put together a comprehensive Shopping Checklist with links to everything that you will need.
When it comes to making bass, there is a relatively simple engineering principle that most marketers will try to talk around. In essence, it goes like this, “You can have a small enclosure, high output, or a low price; but you can’t have all three.”
We have chosen “high output” and “low price” as engineering principles for the MartySub Flat Packs by GSG. The necessary result is that the enclosures must be large. We don’t apologize for the size of the enclosures though because what they bring with their size is off the charts performance, literally.
In most typical homes, a pair of MartySubs (black line in the graphic) will produce full Reference Level output*, so this is what we recommend for most folks. On the other hand, if you are stepping up from a typical store bought subwoofer—say a popular 12-inch model with a 250 watt amplifier (red line)—or if you have a small room, the explosive bass from just one MartySub (blue line) may be all you need.
* Reference Level is 125dB according to Dolby Atmos specifications (115dB for the for the Low Frequency Effects (LFE) Channel and another 10dB for the bass routed to the subwoofers from the screen and surround channels).
OVER TIME...MORE BUILDS, MORE ENJOYMENT
viper72 (Audio forum member)
...finished up the subs. Got everything hooked up! Bass is much tighter than it was before. I popped in Edge of Tomorrow and the opening about knocked my wife and I off our seats! The depth of the flying copters was unreal. You could feel the blades of the chopper hitting your chest.
My wife was wondering what the heck I was doing building a couple of subwoofers. Now she understands... LOL We are both very happy campers!
eng-99 (Audio forum member)
DIY is awesome anyone who is thinking on a Marty box or custom box when it's all done and you turn it up....like way up and feel and hear it it's awesome. I built 4 [subs] and had about 15 or so guys over to hear them yesterday. We played it all the way up +12 on the AVR with limiters set 1200 watts per 18" with 2 iNuke 6000DSP's and it was crazy loud in the room!!! Seats shaking walls moving it was cool.
When your friends are saying oh my god that's crazy loud all your hard work was all just worth it!! Build a Marty it's worth hearing when done!!!
rupedogg24 (Audio forum member)
Finally was able to put the finishing touches on my 2 Marty Cubes over the holiday break.
To anyone that is looking for quality subs without having to break the bank I would highly recommend going DIY. Again, I'm not a handy person by any means. But I put a ton of thought and research into this before taking action. I recommend DIY to everyone I know.
mlah384 (Audio forum member)
I have UM18's in my Mini-Marty's (I have two)...they hit hard.
blastermaster (Audio forum member)
Just tested it out and all I can say is, wow! I went up to the cabinet and I could actually feel it breathe. Now I know why the extensive bracing is necessary. Seriously, this thing is a beast.
I think all I'll need in that space is two of them which should be doable. Even with just the one I could feel the bass and it's on the other side of the room.
Big props to the MartySub!
kmhvball (Audio forum member)
I have finally put together my two Full-Marty's. My 'come from' state is a sub-woofer that was part of a decent [famous brand] HTIB set up... but, WOW I am amazed at how these sound/feel.
mathbern (Audio forum member)
Just wanted to announce myself as another new member to the Marty club. I finished my Marty-Cube on Sunday and watched Avengers: Age of Ultron that evening. I already saw the movie twice before so I was watching my 3 kids and 3 international students that we are hosting watching the movie. It was fascinating to see how much power (as in storytelling power, not SPL) the subwoofer added to the movie going experience. The kids were alternately laughing, hollering, and screaming so much. During one scene, one of the kids actually jumped back out of surprise, something I've never seen her do before. It was great seeing all the excitement in the living room.
mfagains (Audio forum member)
I just finished a Full-Marty a few weeks ago. Come on...jump in...the BASS is GREAT. :-)
This summer I built two Mini-Marty's with Ultimax UM-18's and an iNuke6000DSP and I'm so happy with the subs; I'm a newbie in this and experimenting.
Finished the way that YOU like.
MartySub Flat Packs by GSG come in unfinished medium density fiberboard (aka MDF). Unlike “particleboard”, MDF is a high quality material used in some of the most expensive subwoofer systems available.
Since the panels are unfinished, this means that YOU get to pick how you would like your cabinet finished. Whether you prefer the look of flat black paint or if you prefer the more rugged look of Duratex, the choice is yours.
Look at what MartySub Classic builder Matt B. did with his Full Martys. Absolutely gorgeous. There is simply no limit to how creative you can get!
18” of Thundering Bass.
When you want enormous bass, YOU NEED TO MOVE AIR. MartySubs by GSG accomplish this in two ways. First, there is the enormous port on the front of the cab—that alone increases output by more than three times what you can get out of a comparably equipped sealed sub on the low end of the frequency range.
Second, we have designed the enclosures around BEEFY 18” SUPER-WOOFERS.
Why 18” drivers? You can probably guess the answer…bang-for-the-buck, of course! In the current subwoofer market, the best value for moving the maximum amount of air is to do it with 18” drivers. Drivers that are larger than 18” don’t sell in sufficient quantity to provide the low price that you get with mass production. Drivers that are smaller than 18” just don’t move enough air. So for now, 18” is the sweet spot on the price-performance curve for subwoofer drivers.
If times change, we will too. But for a variety of reasons, we expect 18” drivers to remain the best value for a very long time.
Your Choice of Amplifier.
Unlike most “store bought” subs, builders of MartySub Flat Packs by GSG are free to choose which amplifier powers their subwoofers.
The reason we do it this way? Again, bang-for-the-buck. Quite simply, when you want to purchase an amplifier with 1,000 REAL watts of power (or more), most plate amps (the kind you find mounted on the back of a typical store bought sub) just aren’t going to be able to provide the kind of power that is required for Reference Level bass, or they are going to be VERY expensive.
But there is more…the amps that we recommend come equipped with comprehensive Digital Signal Processing (aka DSP). DSP allows you to tune your subwoofer however you like…more low end, more mid-bass, whatever you prefer. DSP can also be used to correct room "modes", which can make subs sound boomy. The result is TIGHT, CLEAN, POWERFUL BASS.
Based on significant field experience, GSG recommends the Behringer NX3000D for powering a single MartySub (all sizes) and the NX6000D for dual MartySubs (all sizes). More discussion on GSG amplifier recommendations can be found on the Shopping Checklist page.
IT'S AS EASY AS 1-2-3!
A FEW MORE COMMENTS FROM MARTYSUB BUILDERS
David J (GSG Customer)
Just wanted to give a status update on my subs (Mini-Marties with UM18s)... These beasts are scary! I played the opening scene from Edge of Tomorrow last night with the volume about -24 and holy s*!t... These things had my windows vibrating so loud and violently that I thought they were going to break! My wife was in our bathroom and vanity lights were even rattling! I'm afraid to play that scene at reference! Thank you Kevin, John, and the team at GSG for such an awesome product and making movie nights freaking awesome now!
Danny (Audio forum member)
Almost three months into having my two Marty-Cubes set up in my theater and still absolutely thrilled with them. I get a "holy $#!% this is crazy!!!!!" response from everyone I have over for a demo before a movie.
Donny (Builder of multiple MartySubs)
I am really loving my Ultimax in the Mini-Marty. That extra 4-6 dB from 18 to 25 hz is so impactful. If you have the room it's worth it.
vettett15 (Audio forum member)
Just finished installing two Mini-Marty's for my buddies. I had hyped these up to my buddies as we were building them so I was a little nervous that they may not live up to their expectations. It felt like the Pulse scene was expanding and contacting the walls of the house corresponding with the woofer movement. It was insane, never had experienced anything like that. Went through a couple more scenes in the demo disc and we just sat there laughing. These two subs in a 24' x 15' room was just way more than what is needed by normal humans.
Anodynic (Audio forum member)
The lows are of course in a completely different league than my old [commercial 12" sub]. While [the MartySub] can play loud, it is just such a much more pleasant form of loud than pushing smaller gear to its limits. It's easy to get carried away with the volume...
Plagen (Audio forum member)
I am very happy with the result. The bass is much deeper and tighter than my 8 year-old [commercial sub]. I wish I knew about DIY years ago.
nwf477 (Audio forum member)
Finished my second Marty-Cube...this morning. Hooked everything up; all I can honestly say one sounded really good but there is no comparison with two. WOW!!
mal01 (Audio forum member)
I have had my four Full-Marty's up and running for a couple of weeks now and they are really nice.
blastermaster (Audio forum member)
Ok, so I just watched San Andreas tonight. All I can say is that the amount of bass that Full-Marty puts out is just scary. I'm sure it's all good, but I've never seen anything like it before. When I went up to it during the Hoover dam scene that thing was just going crazy and I was actually somewhat worried for it and/or my house. At the same time, it got me so excited that I can't wait to build another sub!
Are MartySubs by GSG a good choice for me?
If you want the absolute best bang-for-the-buck and don’t mind assembling and painting your enclosure, then MartySubs by GSG are ABSOLUTELY for you.
Over the years, we have helped hundreds of folks with their subwoofer projects and have identified three areas that pose the greatest challenge for DIY first-timers:
1. Designing the cabinet (port size and length, bracing strategy, hardware selection including mounting bolts, inserts, etc.)
2. Cutting the panels with laser precision (including the driver cutout)
3. Assembling the cabinets without clamps or special tools and getting edges to line up correctly
MartySubs by GSG(TM) solve all three challenges, thus making the ultra-high value of DIY subwoofers available to everybody.
rpate88 (Audio forum member)
If you've ever had to assemble a desk or furniture from a box you are more than qualified to build a MartySub.
WE CARE THAT YOU SUCCEED. As the MartySubs by GSG were being engineered, more than two-hundred iterations of the enclosure were considered. We worked long and hard get the design just perfect and at the same time be easy-as-pie to assemble. It was an exhausting task, but we invested the time and effort because we want every builder of a MartySub to have a successful outcome.
When you make a purchase from GSG Audio Design, you will be joining a group of folks who are passionate about audio and helping others. We want you to have a great experience with your build and stand ready to assist if necessary.
Should you have any questions about MartySubs by GSG either before, during, or after your build, PLEASE DON’T HESITATE TO ASK!
At a weight of 100-200 lbs per cabinet depending on model (roughly 600 lbs per 4-pack pallet on average), MartySubs are not light (that is by design). This makes them very expensive to ship, especially across country.
To address the high cost of shipping MartySubs, we work with multiple shipping companies to bring you the lowest cost on freight shipping possible.
If you are local to our factory and would like to pick up your cabs (and avoid shipping expense altogether), that can be arranged as well.
Convenient and Secure Ordering.
In order to provide the most convenient and secure online ordering process, we accept a variety of payment options.
For customers with an Amazon account, ordering couldn’t be easier. Just click on “Pay with Amazon” and your order will be processed using the information that you have stored on Amazon—no need to re-enter your payment or shipping information.
For customers who either do not have an Amazon account or prefer to pay using another method, we also accept major credit cards through Shopify Payments.*
* Shopify provides credit card payment processing for companies such as ours and securely handled over $15 billion in customer orders last year. With Shopify Payments, you can feel confident that your payments information will be handled with the utmost care.
A SPECIAL THANK YOU FROM ONE OF OUR FOUNDERS
To everybody who built a MartySub, and particularly to those who helped someone else do the same…thanks guys.
And to everybody who I have assisted over the years at AVS and elsewhere with your projects, thank you for letting me be part of your audio journey. Hopefully with our new production facility, our team of folks, and my business partners Kevin (aka kevings) and Bill (aka grifftek), we can make MartySubs and all kinds of other subs available to folks like never before.
- John (aka LTD02)