DIY Loudspeakers: Can You Build "Better" Than Professional Designs?

[admin]

Loudspeakers are in a class by themselves. No matter where you find yourself on the audio enthusiast spectrum, there is no doubt that people have very strong feelings about them. This article discusses why so many enthusiasts feel like they've got a grasp on making their own loudspeakers. The speaker industry is probably unique in the high-tech consumer products field in that its followers - amateurs, admittedly, actually think they can design and build the product themselves. They often think they can do it better than the loudspeaker company itself! Do you have what it takes to be a loudspeaker designer? How would you build a better speaker system? What design aspects are important to you. Please share in our Forum and Facebook page.


Discuss "DIY Loudspeakers: Can You Build "Better" Than Professional Designs?" here. Read the article.

[jostenmeat]

No disrespect to anyone, but this article would probably get much more conversation at a DIY forum. The title might need to be a little more specific. What I mean is that many members here have "built" their own, and yet some of these members never claimed to know that much about speaker design to begin with. They often get help and pointers simply with the construction of things.

Maybe the article should instead read, DIY Loudspeakers: Can You DESIGN "Better" Than Professional Designs?

IOW, there is a huge distinction between building something and designing it. I one day aspire to push my feeble DIY abilities a bit more at a time, but I do not kid myself that I have the slightest inkling in knowing how to design a speaker.

There is only one member here that I can think of off the top of my head that designs high end speakers, and that is TLS Guy. But there are double digit that have "built" their own.

I wouldn't be surprised if some Statements built here totally floored me. Nor would I be surprised if some speakers that were 10x easier to build, like the ER18s, had me very impressed. In any case, I could see myself aspiring to build something like those, but presently do not have nearly enough ambition to even think of designing something that is superior.

[jinjuku]

Can You Build "Better" Than Professional Designs?

Uhhh. Yes. (taking 'You' in the general sense).

They don’t have anywhere near as strong an opinion about power amps or CD players or DACs or pre-pros. They have opinions, firmly-held even, but not as deeply ingrained as they feel about speakers.

Because Speakers are 98% of the sound and the only mechanical device that couples and directly interplays with the room.

Audio enthusiasts hold fast onto their opinions about speakers regardless of the degree of technical/design/engineering knowledge they have about acoustics and electronics.

That's a really broad statement to make. I think designers into Di-pole, Ri-Pole, Controlled directivity, etc....

The really talented enthusiasts try all sorts of different styles and approaches.

[Xebulon]

Hi,

I don't believe anyone working by themselves can do better than a team of audio engineers with access to the latest technology and materials. I do believe we can achieve pretty good quality and we do have some advantages that the big companies dont:

• No need to compromise on size, weight, or materials
• Lots of time...

In the 80's, it was more common to want to build your own. In fact, we often could build something with much better sound than what was then available. Too bad I can't post pics (I'm too new here...) but my friend Francis and I had several sets of home-built speakers, one of which were JBL knock-offs of their dual 15 incher speakers that have evolved into their Synthesis systems today. They cost a few hundred dollars to build, much less than the thousands asked by JBL at the time.

These were constructed from measurements of actual JBL speakers and the drivers used were of high quality for that time. The sound coming out of them was unbelievable (well, my memory says so anyway..) but the 80's vinyl and CDs we had then were not the best. We enjoyed the sound anyway and it took several years until I heard anything from the larger manufacturers that approached the quality of these home-built enclosures!

I think that we can still build very good quality speakers, using available math formulas and excellent materials, plus a lot of hours in the shop. Forget about curved sides and other fancy construction tricks but building our own enclosures from scratch can still provide the thrills that only building your own can provide. I'd love to do that when I have more time (and some workshop space) in a few years!

[BoredSysAdmin]

There is only one member here that I can think of off the top of my head that designs high end speakers, and that is TLS Guy. But there are double digit that have "built" their own.

Technically Denis Murphy is also member of this forums, but then again he is a pro and no longer qualifies as DIYer (I guess few more industry pros here and there)

and I 100% agree about the intended audience - besides these two any other AH member at best designed a subwoofer, the rest ether built from ready designs (I know I intend to someday) or not into DIY at all

[jinjuku]

From Jeff Bagby at the Parts Express Tech Talk Forum in it's entirey. Here is the direct link.

While it’s true that Arnie Nudell began Infinity in his garage, this does not represent what DIY speaker building was really all about at that time. When I began my interest in this hobby it was 1979 and I was in college. At the time most speaker builders were like me – we went to Radio Shack and picked up drivers (8” woofer, 50Watts, 20Oz magnets – that’s it for specs), put them in a box with little understanding of tuning, and used first order crossovers, sometime only tweeters. I guess there are quite a few commercial speakers made the same way today, but I digress….

In the first couple of years my curiosity led me to discover AES journals in the library and I began to learn more about speaker design from the experts. Needless to say much of it was way over my head, but I was still able to learn about alignments and pick up some formulas and began to discover that some drivers came with T/S parameters that would tell me what box to put them in. What a leap in my understanding!

In the 80’s I built speakers using a calculator and notepad. My crossovers were beginning to use Zobels and things like that, and I was probably moving into the upper levels of the DIYer world at the time just by doing so. Commercial products however, were light years ahead. They were measuring frequency response and impedance and designing complex crossovers that most of us in the hobby didn’t even understand. There was a huge chasm between what they could do and the average DIYer hobbyist. The birth of Speaker Builder magazine in the 1980 helped a lot, but we were still far behind the pro’s.

As the 90’s rolled in this changed slowly with the creation of on-line bulletin boards and email lists, like the old Bass List. Madisound had a bulletin board you reach via modem. Then in the late 90’s the internet began to open the door and Madisound’s discussion forum became the haven for discussion. I discovered it in 1997 and quickly settled in. I have been Jeff B. ever since. This was where I connected with people like Paul V., John k, dlr, PEB, Rick Craig, Ron E, Andy G, and many others. It was working with Paul V and John K that I began to create my spreadsheets. These weren’t built in a vacuum, there was a huge exchange of knowledge taking place. I have hundreds of emails from discussions that went off-board as we worked together on tools for designing. Pretty much everything I learned of VBA I learned from Paul, and John taught me math that went well beyond my schooling, but I’ve always been able to pick things up and run with them.

Some well-known names would frequent the board. One of those was Siegfried Linkwitz. I still have a post of his that I copied off in the early 2000’s where he posted an encouragement to the community that we DIYers had the means to surpass what was commercially available because we were not forced to compromise in the way a commercial design needed to. I was inspired by what he wrote and decided to push even harder for more understanding. If Linkwitz thought we could do it, then I wanted to do it. It was during this time that I began to create Passive crossover Designer, as Paul and John, and others also began to create design tools that would all work together. The FRD Consortium was born. The Consortium was Paul’s idea and he hosted. FRD’s by the way were file format from LAUD by Bill Waslo, who just happens to be one of us.

Now, let’s leap frog to 2012. Attending gatherings like the InDIYana gathering in Fort Wayne or the MWAF in Dayton reveals the current state of the art in DIY speaker building, and it reveals that this state is quite high. In the early gatherings I attended there were a handful of impressively nice speakers, but there were also some speakers that, well, I wouldn’t be able to brag about much. But now, this is no longer the case. Sure, there are imperfect speakers, but it is rare now to get any multiway loudspeaker that doesn’t have reasonably flat response and isn’t based on a decent design philosophy. Then when you look at the craftsmanship…. Wow! It is amazing what these guys can do. The fact is, for a small investment, tools like OmniMic and DATS give the DIYer a very easy way to measure almost anything you would ever need to measure to design a good set of speakers. There are other tools available that help to design crossovers and predict speaker behavior like diffraction and polar response even before you build. When you couple this with uncompromising design and craftsmanship you quickly realize that we have reached that point where the DIYer (any DIYer who really wants to) can meet or exceed the performance of almost any commercial product available today.

Twenty years ago very few of us could make the measurements or use them like a speaker company could, but that is no longer the case, today we can do almost exactly the same things (believe it or not I have been contacted by several professional engineers asking for permission to use my design tools on their jobs). And because of this we have reached the point where Siegfried’s statement enters in – we can do this and not compromise anything if we don’t want to. For a one-off-speaker for ourselves we can choose drivers, crossover components, and cabinet construction that mass producers just can’t do unless they want to sell for Wilson Audio prices. Take Dan N’s Echelons, for example, what would a commercial version of that speaker be priced at? $20,000? More?

I came away from the MWAF convinced that we are there. We have, as a community, not just as a couple of individuals, reached the point where we can build at a level of performance comparable or exceeding that of the finest commercial offerings. You can quote me on that – I won’t take it back. I saw and heard too many excellent examples of what I am referring to as proof for my statement. This is the current state of the art of DIY speaker building, and it is state of the art.

I want to close by calling out a couple of designs that really impressed me in one way or another. First, this was the second time I listened to Dan’s Echelons – without a doubt one of the best sounding speakers I have ever heard in my life. It is certainly on the same plane or higher as the Salk Soundscapes or Archos, two speakers that I was involved with personally. 6th Planet’s open baffle design was beautiful, very creative, and sounded very nice. One of the highest scorers on my list was Tom Zarbo’s curved Cellos. I was disappointed that they didn’t win something because they were one of the best sounding and best looking speakers of the day in my opinion. This just shows how high the bar has been raised. Dave Pellegrene’s Dragsters show what kind of creativity exists in the group. And Wolf's designs are always impeccably voiced.

There were many more designs that were excellent, but it’s impossible to comment on all of them. I can only say that I am impressed, and I am humbled by the level of skill I see demonstrated which is some ways is well beyond my own. I am thus honored to be included in this group of hobbyists.

And the Linkwitz post Jeff was talking about:

“I regret that so few seem to be genuinely interested in understanding and furthering the science behind sound reproduction and what detracts from its accuracy. As DIYer you have more freedom to design and explore than a speaker company. It is certainly within your realm to surpass the performance of even the costliest commercial products with very few exceptions. After all, you have access to just about the same drivers and components. But in the end you reach the same plateau that this industry has settled for, unless you look further than the techniques that everybody is using. But then again, you may be just interested in building your own inexpensive speaker, which is fine and a valid reason for DIY, but I am not willing to spend time on that part alone and therefore do not post in such discussions. “

S. Linkwitz (On Mad Board 5/26/2001)

[AcuDefTechGuy]

In terms of SQ, I think DIY/ ID can sound AS GOOD as professional B&M speakers.

But in terms of aesthetic, I don't think that DIY/ ID can look as great as some of the B&M speakers.

[Dennis Murphy]

Technically Denis Murphy is also member of this forums, but then again he is a pro and no longer qualifies as DIYer (I guess few more industry pros here and there)

and I 100% agree about the intended audience - besides these two any other AH member at best designed a subwoofer, the rest ether built from ready designs (I know I intend to someday) or not into DIY at all

Hmmm I think a "pro" makes money at this sport. I am a negative pro.

[BoredSysAdmin]

Hmmm I think a "pro" makes money at this sport. I am a negative pro.

Making money is not same thing as designing great speakers...
I'm not Marketing Pro by any means, but I think I have few ideas which are outside of this thread

[Nuance AH]

Couldn't it be argued that some of the best of the best likely started as DIY? Without DIYers we'd likely have a lot less speaker manufacturers. With that said, I don't think the average DIYer could match the overall quality of a large company that has all the necessary resources, tools and funds. You can certainly get very good sound by going the DIY approach, but better than the well known/established and rooted pro designers? Probably only a very small percentage...

In terms of SQ, I think DIY/ ID can sound AS GOOD as professional B&M speakers.

But in terms of aesthetic, I don't think that DIY/ ID can look as great as some of the B&M speakers.

DIY is not the same as ID; ID is a business model. Once a DIYer starts selling speakers for a profit through a company name they are no longer DIY.

As far as aesthetics go, tell that to Salk, Daedalus, Tyler Acoustics, Funk Waves (of which you own some of their products) and Status Acoustics (are they ID?); and there are plenty more. I'd be willing to bet those companies could at least equal B&W's build quality, and probably make a better sounding speaker too. It's time to visit RMAF or another large audio show and see in person just how good some of these ID manufacturers' build quality is.