Wait, you're doing this for free?? Clearly, your wife loves you for your selfless endeavors!Today was an eventful day. The weather was finally nice enough for me to measure subwoofers outdoors so I measured both the SVS SB2000 Pro and the SVS SB3000 subwoofers.
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I also finished testing of the Dutch & Dutch 8c. As some of you already know, the Dutch & Dutch 8c is a speaker that breaks the norm. It is designed to be placed near a back wall in order to provide boundary gain. In order to achieve boundary gain, however, a typical speaker also loses timbre due to the rear wall reflections. With a cardioid speaker (such as the D&D 8c), the rear wall reflections are effectively "muted" and you are left with a forward-firing only speaker above 100Hz (below which, the subs are omnidirectional but cut off sharply).
This presents a bit of a challenge when analyzing performance. Ideally you measure a speaker anechoically to see what happens when the room is not a factor in the performance. So, I did that using Klippel's NFS. This gives us all a baseline understanding of the speaker's performance. However, I also needed a way to characterize performance in the situation it is designed for: near a boundary for <100Hz reinforcement.
Therefore, I used high engineering (see: scrap wood) to build a platform for the speaker so the subwoofers could load off the ground - effectively becoming the "rear wall", if you will. And then I measured the performance in this manner.
Now I have a full SPIN set of data for anechoic measurements but we also have a quasi-anechoic measurement via the ground plane method to see how the boundary loading improves performance.
To be honest, there were a couple times today where I thought "I'm not getting paid enough to do this for free".
Anyway... stay tuned for results.
If your browser in smart enough to render SVG I guess it can do JavaScript. There are only good browsers now. If you are using lynx or w3m then ... sure.Or just use SVG, no need for another retarded "website that flat-out doesn't work without Jabbascript".
Indeed, and the sneak preview looked fantastic.
Netsurf and Links2 can do SVG. You can also disable javascript for sanity reasons, while SVG usually isnt too insane if you ignore the embedded JS and animation part of the spec.If your browser in smart enough to render SVG I guess it can do JavaScript.
"Good browser" is basically an oxymoron, as long as you consider the latest HTML + CSS + ECMAScript (and the "mandatory" sandbox/JIT to avoid being a security/performance hog; hardware based vulns like rowhammer or Spectre are still there, as JS is basically a RCE passing as a "feature") to be the bare minimum for a browser. And all of this just for shiny that sells.There are only good browsers now. If you are using lynx or w3m then ... sure.
Wait, you're doing this for free?? Clearly, your wife loves you for your selfless endeavors!
The 8361A is CD down to 180~200 Hz too, on its side (a bit less clean around 500 Hz, though). We need the 8c's vertical dispersion to really compare both.Oh damn I didn't even notice. That thing is perfect CD down to 200hz. That's far lower than the genelecs.
Don't worry, my crusade won't go further.Guys, please take the JavaScript OT discussion to another thread. I don’t want a 5 page argument on this thread about it.
Oh damn I didn't even notice. That thing is perfect CD down to 200hz. That's far lower than the genelecs. Absolutely amazing performance. Tight uniform directivity.
Truly next gen audio.
Please have a look at the text below the graph, it says "Norm. to 0°".IMO the best-looking and most information-rich polar maps currently published are Sound und Recording's. Their steps do obscure some fine detail (1/3 octave smoothing, colorization more like a beamwidth graph than most polar maps) but they manage to convey both FR uniformity and directivity trends in a clean graph. For this speaker (JBL 705P) it doesn't especially matter, but their polar maps are not normalized.
So how much of this well controlled directivity is as a result of the physical design and how much from the DSP? If DSP, then we can expect to see this level of performance coming down to consumer friendly levels in the near future (like the Buchardt A500).No surprise what comes to 8c directivity - they are stellar speakers.
DSP can't really control directivity, unless you include what's done in the crossover (impacting only the crossover point and around, then) and the delay used in solutions like the Kii three or PA stuff. In the 8c's case, the mechanism is purely passive, mimicked on ME Geithain's.So how much of this well controlled directivity is as a result of the physical design and how much from the DSP? If DSP, then we can expect to see this level of performance coming down to consumer friendly levels in the near future (like the Buchardt A500).
HEY, just caught your excellent YT interview with Gene of Audioholics, quick subwoofer question for you: what do you recommend if I needed a solid LFE home theater sub connected to a pre/pro that has its own bass management (don't need the sub to have sophisticated settings/DSP/app)? Would it be the $800 Monoprice THX 12-inch sub?Haha. Yep. This is my hobby. Done in my spare time. I’ve been testing transducers and speakers (mostly transducers) with Klippel equipment and and on for about 10 years now.
My wife is very supportive of what I do. Surprisingly so, to be honest.
So how much of this well controlled directivity is as a result of the physical design and how much from the DSP? If DSP, then we can expect to see this level of performance coming down to consumer friendly levels in the near future (like the Buchardt A500).
DSP can't really control directivity, unless you include what's done in the crossover (impacting only the crossover point and around, then) and the delay used in solutions like the Kii three or PA stuff. In the 8c's case, the mechanism is purely passive, mimicked on ME Geithain's.
Aaaah, so even software can only do so much! but this begs the question: since it's easy enough to pull these speakers apart to duplicate their key design principles, I'm wondering why more companies are not copying these designs? I guess it could be argued that the JBL 306P is one such fine example, but I'm surprised there aren't more out there. We've seen Topping and SMSL do this with DACs - maybe they should start selling speakers too.They started out by optimizing as much as possible on an acoustical and structural level, and then used DSP as icing on the cake. As you'll probably see soon in the measurements, it's an extremely well thought out design.
Well, the front half of the speaker wouldn’t be terribly hard to replicate. The difficult part is the cardiod and rear drivers, where in the software you tell it the distance from the front wall and it then adjusts roll-off, as well as even timing I believe in order to have optimal bass.Aaaah, so even software can only do so much! but this begs the question: since it's easy enough to pull these speakers apart to duplicate their key design principles, I'm wondering why more companies are not copying these designs? I guess it could be argued that the JBL 306P is one such fine example, but I'm surprised there aren't more out there. We've seen Topping and SMSL do this with DACs - maybe they should start selling speakers too.
Aaaah, so even software can only do so much! but this begs the question: since it's easy enough to pull these speakers apart to duplicate their key design principles, I'm wondering why more companies are not copying these designs? I guess it could be argued that the JBL 306P is one such fine example, but I'm surprised there aren't more out there. We've seen Topping and SMSL do this with DACs - maybe they should start selling speakers too.
In most cases, it is probably a deliberate design decision to reduce the sound power in the 2-4kHz range, often with the goal that the lateral reflections in this range do not indicate an exaggeration.As for Buchardt, their new speakers have awesome tech. However, they still use a 0.75” tweeter to my knowledge, which (to my knowledge) hinders their crossover region even with their large waveguide and the thus have a dip in the sound power, crossing over a 6“ driver at 2800Hz will do that. Here is the A700 measurements from their site: