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tktran
About
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- tktran
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Comments
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Ben, We are of similar vintage- age around 50. I got into the hobby about 25 years ago. Following the success of my first build, buddies of mine wanted to build their own "column speakers", but wanted subwoofers as well. I’d heard on the…
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(Quote) I think- Better the tool you know, than the tool you don’t. And important to know one’s limitations. We all have different journeys to go along. Including a Danish startup called Borrensen: (Image) MLSSA, Praxis, WinMLS, Omnimic, Xsim, …
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I preferred Pjay’s interview with Dennis. Unfortunately his website is gone… it was titled The Gurus Speak! http://www.helarc.com/guru/gurusspeaker.htm
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Thanks for your review, Scott I have a 4002 and 2x 1002 XPA. I used them in a tri-amped active system and they function very well. Even for the treble, because a typical dome 90dB/W/m uses such little power. The single downside I have had is that t…
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Steve, I didn’t post any further music clips to compare and contrast after @dcibel notified me of clipped samples in one of the 3 music tracks that was posted:(Image) I hadn’t even listened to this before posting- it was hot off the press, or str…
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So far there’s a lot of hand waving from some keyboard warriors. Perhaps some listening, but no actual testing, as far as I can tell. @dcibel is the only person who gave feedback that one of my 3 audio tracks had clipping in it; and I’ve identified…
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@Steve_Lee That’s actually a simulation, based on some mathematical models that are about 20 years old With FSAF, you can record up to a minute of music (eg your drum tracks) in the far-field (mic > 2x baffle width) and then listen to the disto…
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John, Ben and Steve: Soon we'll be able to measure our speakers with the same music that we listen to. Have a look at this: https://youtu.be/k3YxccHo1As from- https://www.diyaudio.com/community/threads/measuring-speakers-using-music-michael-tsiro…
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Bummer. Am in conversation to devise a process / methodology for distortion testing of drivers (+/- crossovers) or complete speakers, using _ real music_ test tracks (15-30 seconds ideally) Looking for music that is familiar/enjoyable for listeni…
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We spoke about it previously: https://diy.midwestaudio.club/post/quote/2303/Comment_46449 I added 4 my cart, but paused when shipping was $600USD to Down Under… Any stateside testers?
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Which models?
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“I call for heavy stuffing at the bottom of the enclosure to reduce the lengthwise pressure node at 140Hz. Not doing so would cause some audible raggedness in the midbass. The difference between enough and not enough stuffing is easily seen in an im…
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I agree with what @"jr@mac" said. I once read from Ulrik Schmidt, an industry veteran ex-Scan-Speak, now at SB Acoustics, “the suspension should allow for the top/bottom of the coil winding to reach the bottom/top of the top plate – but …
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(Quote) No driver likes to be bottomed- the hard clipping or mechanical damage as the top/bottom of the coil hits the bottom/top plate. After 20 years on the market you’d think PE/Dayton would have asked the OEM to put in a bumped back plate…
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(Quote) Well then if we use something like this we can choose an approximate gate: (Image) I put in 1.2m to simulate the driver and mic at half the height of a typical 8’ ceiling, and measuring at 1m. That gives a gate of 4.5ms, which is a bit sh…
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Thanks Ben, I’m not familiar with Omnimic. Under ~600Hz, floor bounce is causing peaks and valleys in the response, but What’s happening to give that grassy region in the FR, above 1KHz? Does Omnimic auto-gate?
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When you said a big Bose system, I thought you meant one of those column systems like the Bose L1 Pro16/32… Those portable devices are designed for BGM tasks; a modern clock radio…
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So I looked up Afterlife, this is a UK producer that I have heard a track or two before; ~ 20 years ago. You lifted me up with your accompaniment to Spec of Gold, which I have never heard before. As I am not versed in recording of drums, I can of…
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Hi Ben, Is there any chance you are able to do a 45, or 60 degree off axis measurement?
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Lovely! There’s something strangely satisfying watching a build like this. Perhaps it’s the gorgeous fine detailing like the inlays or accents. Or perhaps it’s the living vicariously through others- something that takes us months (if complete) s…
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Even the 830668 would suit 300Hz-400Hz low pass (Image) There is a cone/surround edge interference that causes a dip at 800Hz in the near field (not shown) that means I would limit the low pass for 400Hz. But Note the rising H3 in the midrange, …
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Free bass? The port. Best. Invention. Ever. So yes, although my main system has a pair woofers in a sealed box, I’m well aware that it’s about the same as a single ported woofer, in terms of deep bass output. A single ported will be cheaper th…
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Hi Matt, Thanh here. Although they are representations of the same data, sometimes I like to switch to the Polar Map view instead of the line chart. But in the line view there’s bunching around 4.5KHz, which can be seen in a “bloom” in the polar m…
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115dB is for the subwoofer (31.5 - 120Hz; +/- 3dB) It’s just 105dB for the screen speaker channels (80Hz to 16KHz +/-3dB ) ( at the listening positions ) Reference: https://acousticfrontiers.com/blogs/articles/thx-reference-level-explained#:~:tex…
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I think few are debating the physics of the big cone vs the small woofer when it comes to bass. Like how the Purifi 10" midwoofer outperforms the 4" Purifi midwoofers. Or the how the 15” GRS will outperform the 8” GRS. I was referring to …
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And now we finally understand why. For decades audiophiles and engineers and speaker building enthusiasts would mostly agree on one thing- big woofers are better than smaller woofers for bass. Or you may have heard “if you can see the woofers moving…
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@ScottS What was the sensitivity of your three-way Scott?
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Sorry my response is in relation to Scott’s 3-way with the older 3” Tang Band dome. The OX20 is still available at PE, and if the AC200Mk2 can be found…
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The Tang Band 75-1558SH looks like it can manage an acoustic LR4 at 800Hz. https://audioxpress.com/article/test-bench-tb-speaker-75-1558sh-high-end-home-audio-3-dome-midrange
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You really should take dual axis measurements: 0-360 in horizontal plane (0-180 if symmetrical) and 0-360 in vertical plane every 10 degrees. A lot of your queries about voicing will be revealed once you see how your crossover adjustments will aff…