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  2. Thanks! My first build (the big cuts were done by the carpentry, just had to do the speaker, middle brace and handles holes) and the first drivers I ever bought ahah. The DIY way makes me discover a lot of things! I like the look they have, the varnish tinted them in yellow, that was a great surprise, it gives them a vintage touch! My last coat was drying yesterday, hope the weather will be fine next week-end!
  3. Avengers:Endgame BEQ (Dolby ATMOS 7.1 Channel Bed) I got to screen it with the BEQ, and it is a substantial improvement. Correction: LFE Channel 1. Gain -7dB 2. Low Shelf 17Hz, Slope=1, +6dB 3. Low Shelf 18Hz, Slope=1, +6dB 4. Low Shelf 19Hz, Slope=1, +6dB LCRS Channels 1. Gain -7dB 2. Low Shelf 25Hz, Slope=1.25, +5dB (3 filters for +15dB total) 3. Low Shelf 50Hz, Slope=0.5, +1dB 4. PEQ 30Hz, Q=2.87, +6dB JSS
  4. Today
  5. As for max output it's essentially the same as the DS or the LaVoce, but falls about 1db behind under excursion limit and is less than .5db ahead when power limited. I'm unsure if the Leb of 0.001mH is correct @Ricci
  6. Any chance you could throw the 18sound driver in there?
  7. Yesterday
  8. Lol can’t do that (or I totally would lol). Was looking at a fridge sized area (84 W x 31 H x 26 D) broken into two ported boxes that replace my entertainment center (And my components would be broken into two new tower sections on either side).....
  9. Try em in Hornresp. Nothing special, just a simple floor-to-ceiling single fold. Tune comes in about 22 Hz. Epically good. Big coil means it soaks up the power and has a nice low inductance too. The temptation is strong with these... Honestly, If I did not have 4 of the 18" 9601s, these would already be in my theater.
  10. Last week
  11. Thanks for the suggestions which I will keep in mind for when it's time. The tech is definitely not ready yet, and there are a few major things I need to accomplish before I'm even ready to test in other rooms. Hopefully I'll be a lot further along in a few more months. I already have a design for a test/demo speaker that I have all the parts for except the waveguides, which I may regret not buying earlier if they are covered by tariff now. I did get a bit carried away over the summer.
  12. Spider-Man: Far From Home (Dolby ATMOS 7.1 channel bed) Level: 4 Stars (111.9dB composite) Extension: 2 Stars (21Hz) Dynamics: 5 Stars (29.93dB) Execution: TBD (3-4 IMO) Overall: TBD Notes: 4k disc definitely provided the better track, with 24 bit depth (16 bit for DTS on BD), and slightly higher dynamics. More low level noise noted on the DTS track. Some flat tops, but not as bad as other Marvel films. This track appears to be VERY amenable to BEQ, with a single correction for all channels. Will post up BEQ later. JSS
  13. Well there are people selling cable lifters, so it seems to be easy convincing people that they need something. Your approach has the benefit of actually being the best upgrade somebody with a good system can get, so it should be easy finding somebody to quote something like "after spending so much money on hardware with little improvement, I was baffled that there was such an improvement to be had for comparably little money" just a little shorter. Targeted marketing should also be fairly easy. Go to Facebook to place an ad (paid post) and you can select people who're living in your region and like the facebook page of marantz for example. That way you'll reach almost only potential customers and your conversion rate is high. Marketing is a huge subject thou which isn't easily explained.
  14. This is great, and as you mention - the challenge is how to market sound. The irony is, that it would be easier back in the 80ies - 90ies - before the internet. Today, you are easily lost between all other outstanding and remarkable offerings, and they have a larger marketing budget. Describing sound quality in text is a hopeless exercise. You can never have the receiver understand what you mean, until they actually experience it in person.
  15. Thanks for the encouragement @peniku8! I live in the USA and anticipate working locally or traveling as necessary. I'm not willing to work remote, at least until the technology is more mature and I have more experience with a variety of different rooms. And no, a mic is definitely not a substitute for being physically present. I actually need to walk the whole room during my evaluation.
  16. I know, right?? Please, someone buy the 9601s so I don't.
  17. If anything keeps you from starting a business, just do it! Do what you enjoy doing, and if you can make money with it it's even better. Despite running a recording studio, doing live sound and filming music videos I'm also thinking about selling PA subs. I've got two designs which I really like and will build to test. If they work well and turn out as I modeled them they're going to be great subs and I will add a few of them to my live rig. Do you want to make this a local business or like traveling all over the states (or where you're living at?). Would be awesome if you could somehow do remote work, but calibrating a room without being physically present in the room itself might be a little difficult. At least cumbersome and you won't know if it's perfect since the mics don't always tell the whole story clearly
  18. I see it's been about two years since my last update. My hardware configuration hasn't really changed in that time. I still have all the drivers I was going to use to build new MBMs, but I'm now not even sure I need them. Building them is a very low priority, and the amp I bought to power them is likely to get used to power my "demo" speaker system instead. OTOH, the DSP configuration has been modified heavily. In other threads here, I've hinted about my discovery of a novel method for optimizing low frequencies. I've made substantial progress on this and also on optimizing high frequencies, which seemed to benefit from more attention after I'd managed to drastically reduce the muddying effect of low frequency problems. Lately, my attention has returned to low frequencies, this time dealing with sensitivity to physical /environmental changes such as the precise location of MBMs and absorber panels vs. where they were when I measured. Just this week, I finally implemented the first algorithmically optimized low frequency configuration. I expected some improvement below 40 Hz, but was amazed by how much the increase in precision provided by computer vs. hand optimization improved the sound from the mid-range on down to the very bottom. I watched some of the scenes from "Ready: Player One" using the @maxmercy BEQ. It's hard to describe the experience. Despite pushing into the 120s dB, the bass never trampled the mids and highs, which came through clearly even on the weightiest of sound effects, yet the bass itself contributed intense physicality to some of the sounds. The slam was impressive, not just because it was there but because it was *everywhere* and in a wide variety of different flavors rather than being a one-note-ish thump as is often the case with PA systems. I also didn't notice any house shaking at all, but I don't know if this will be the case with other movies. As a kind of ironic conclusion to this thread, I figured out that I didn't need 4 MBMs with independent DSP to get "perfect bass response" at all my seats, yet the title seems to be a reasonable description of what I experience now with my optimized configuration. What I mean is that the bass almost feels like it's coming from inside my own body, and this sensation follows me around the room, even when I'm well outside the "calibrated" listening area. This is similar to experiences I've had with superb quality bass systems outdoors, but I'm experiencing this indoors throughout a room that's not especially large nor heavily outfitted with absorption. The low frequency sound in general seems to be completely untainted by the room, and the acoustics of the recordings (whether natural or synthetic) come through with remarkable clarity. Unlike those outdoor systems, I am able to take full advantage of room gain and hit high SPL down to much lower frequencies. Part of the reason I became so quiet about my recent work on my system is that I am seriously thinking about seeking commercial application for my technology. My confidence in this regard has been growing over the last year or so. I'm now fairly confident (i.e. > 50% chance) that I will go into business, in some form or another, with this technology. I haven't worked out the details yet, but I have some ideas. I'm likely to start small with custom / bespoke installs. These could be for ultra high-end home theater or perhaps for mixing / mastering rooms. These early jobs could fund further research into adapting my methods (or developing new ones, where necessary) for cars as well as potentially larger rooms (cinemas?) and outdoor environments. Admittedly, I'm shying away from doing any kind of consumer product because I don't know if I will be able to make my tech work reliably under those circumstances. I don't know if I can really make it "idiot proof" enough, but I can potentially research that too. So with that said, I'll try not to self-advertise too much in these threads. Thus far, I haven't really meant to. I'm just passionate about this subject and am having a very hard time "keeping this great sound to myself". Maybe I should just record my system and post it on YouTube? () Seriously though, from a marketing standpoint I've already lost. Just about everything positive I'd like to claim about my own sound has already been claimed repeatedly for other products that, IMO, don't live up to the hype. So perhaps my best approach is just not to *say* anything and let my systems "speak" for me. That probably means starting small and growing very slowly, which isn't necessarily bad.
  19. SME

    Noise at low SPL

    From your description, I'd be more inclined to suspect something going on with electronics. It's almost like there is noise in the signal chain but a muting circuit is acting to stop it the noise until sound starts playing. Then at higher levels, the sub is music enough that the noise is drowned out. What kind of electronics are you using? This is a bit of a stretch, but it's possible what you're experiencing could be caused by numerical precision issues in the DSP, hence it's more pronounced at lower signal levels.
  20. Please god someone buy those 9601s...... The amount of WinISD sims I have for them in large ported low tuned boxes, not counting scheming to make a Skram or Skhorn fit in my 16x18 FAMILY ROOM HT are causing my head to hurt. And that’s ignoring determining what to sell to fund the purchase and getting them into the house without being murdered in my sleep by having them placed over my head in lieu of a pillow... Please someone take the temptation away lol...
  21. I don't hear any noise when gently moving the cone. In fact, when the noise occurs, the cone really isn't moving because the SPL level is very low. The only time the noise occurs is when the driver is playing something, but at a very low level. I wouldn't describe it as tapping or ticking, more like a slight popping like a radio station that is not quite tuned in. These are 18 inch iPal drivers. Do you have information on the issue you experienced that I can reference? The sub has 2 drivers and the noise comes from both of them which is why I didn't suspect a driver issue.
  22. Ricci

    Noise at low SPL

    Do you hear any scratching or feel it rubbing if you gently push in on the cones? Is the sound more similar to a tapping sound or a ticking? Myself and some others did receive some 21Ipal's which were making a tick or tap type of sound. B&C replaced mine. I suspect that it comes from a loose shorting ring, but I'm not sure. It sounds like you may have the same issue.
  23. Based on the specs it should be. I've never seen any 3rd party data on it though which trumps MFG specs IMO. Unless it is significantly cheaper I'm not sure I'd choose it over one of the Lavoce, B&C or 18 Sound models. If you are getting a great deal by all means give it a shot.
  24. I'm hoping that Ricci or others with more experience with high end, high efficiency drivers can help solve an issue I am having: My subwoofer uses B&C iPal drivers. When there is bass content at a very low SPL level (barely audible), the bass sounds scratchy. It is almost like there is static in the signal. Turning the volume up to a more moderate SPL level eliminates the noise and at very spirited levels, it sounds fantastic. Luckily, this exact scenario is very rare during normal listening but it does occur in scenes where the SPL of the bass content is very low like distant background music. Is it possible that what I am hearing is the result of the high efficiency of the drivers themselves? My thought is that at very low signal levels, the signal to noise ratio reaches a point where noise that usually wouldn't be heard becomes audible. Because the drivers are very efficient, they are able to pickup this very weak signal and produce noise where lower efficiency drivers would remain silent. If that isn't the cause, what might I look at? I have already tried different receivers, cables, power source, amplifier, etc.
  25. And it expired today so someone can take off with it if they so desired.
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