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3ll3d00d

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Everything posted by 3ll3d00d

  1. 3ll3d00d

    X-curve compensation re-EQ

    Yes that is part of the audiophile style marketing they use. You will also find not many measurements are available to verify what it is actually doing and how well it performs. FWIW I think https://patents.google.com/patent/US8094826?oq=8094826 is their patent, it seems pretty generic to me though. To be fair I have listened to their high end kit and it is good so there some substance there, it isn't just audiophile blather.
  2. 3ll3d00d

    X-curve compensation re-EQ

    fwiw this is basically the way roomperfect is marketed (albeit with a healthy dollop of audiophile voodoo mixed into the language used)
  3. 3ll3d00d

    Woofer for 40-250Hz?

    finally received the amp so should be able to fire this up properly soon https://imgur.com/a/CPjzmq5 I did test the initial XO and I think the woofer filter hasn't come out quite right, some details in http://www.diyaudio.com/forums/multi-way/292379-syns-post5471697.html need to get time to investigate that but frankly it's been too hot in London recently to consider doing anything except idly watching the World Cup while drinking cold beer
  4. 3ll3d00d

    Woofer for 40-250Hz?

    I'm looking for a woofer suitable for use in the ~40-250Hz range and that is comfortable in a relatively small enclosure and ideally could be used in either ~40L sealed or ~75L ported. Intended use is HT as the bottom end of the LCR but which will also receive that portion of the LFE (i.e. want to be able to try spreading the LFE down to this point across the LCR). Not too concerned about cost really. Drivers I've modelled so far include FaitalPro 15XL1400 - 15XL1400 by FaitalPROBeyma 15p80Nd - LOW & MID FREQUENCY 15P80Nd | Beyma18sound 15nlw9401 - 15NLW9401BMS 15n840 - Overview Current favourite is the BMS. Any other suggestions or personal experience of such drivers appreciated.
  5. 3ll3d00d

    BMS 18N862

    It's still listed on the BMS site and appears to be readily available in Europe
  6. 3ll3d00d

    Woofer for 40-250Hz?

    I did give it a sweep through dats and used the rub and buzz test, seems ok. Will hook it up to an amp soon to make sure. There are two different uses here. I have built one to try out the smallsyns so I can decide whether to build 3 more to use in my cinema setup. This one will be used by a local choir for their rehearsals so will have much more limited output requirements. I could probably have got away without the woofer for this one but I thought it would be handy for trialling the speaker as I intend to use it. This means a woofer happy in a pretty small box (~1ft3), the fp looks good for that. The AE will replace the woofers in my current 3 way LCR regardless of whether I build the smallsyns. These will be in bigger boxes (maybe 2.5ft3) and need markedly more output capability. The AE were the best ones I modelled for this job.
  7. 3ll3d00d

    Woofer for 40-250Hz?

    The TD12 turned up today, just about safe and sound albeit no thanks to UPS who appeared to have played football with one of them ๐Ÿ˜
  8. 3ll3d00d

    Woofer for 40-250Hz?

    FWIW I ended up ordering 3 TD12X on the 9th May and they were shipped on the 25th, they landed in the UK just now apparently so should be with me in the next day or two. I also have a faitalpro 12rs1066 to go in the initial (smaller) woofer, seems like a fairly beefy little thing https://imgur.com/a/lMGuhqm surround seems rather enormous I chose this on the grounds it is comfortable in a pretty tiny box and aimed for a tune that in the high 30s, result was a 37Hz tune https://imgur.com/a/4bmN268 https://imgur.com/a/xrXFi0Q it's going in this box (NB: the pole was just to check the fit, not actually going to deploy like this) https://imgur.com/a/5FpHtdy powered by a hypex fusion plate amp crossing to the small syns at ~150Hz
  9. 3ll3d00d

    Inductance modelling

    Interesting thread developing on diya - http://www.diyaudio.com/forums/subwoofers/320189-inductance-cancellation-techniques.html - regarding more accurately modelling the effect of inductance (and building that into hornresp making use of data that is captured by rew or arta).
  10. 3ll3d00d

    Inductance modelling

    @deepthoughts I think http://www.diyaudio.com/forums/subwoofers/320189-inductance-cancellation-techniques.html#post5390118 summarises it and https://www.roomeqwizard.com/help/help_en-GB/html/thielesmall.html#top gives the full name of the Thorborg paper
  11. 3ll3d00d

    Inductance modelling

    That was the weight it took to reduce Fs by about 25% which is (as far as I recall) approximately what you are aiming for. I don't believe 10-20รท of mms is a target I have ever seen mentioned either, that seems much lower than I recall being used. (Edit: the "testing loudspeakers" book advises to start with 60% of cone mass which is about 100g, not much less than the actual weight used) I am aware of the assorted issues around applying the delta mass method though, as commented in that thread, the resulting basic params are not wildly out of spec.
  12. 3ll3d00d

    Inductance modelling

    I gave it a go with some DATS measurements for a FaitalPro 12RS1066 but get a giant value for Rss (see https://www.avnirvana.com/threads/imported-impedance-measurements-produces-giant-value-for-rss.2687/ for details). I can't say I was super careful with the z measurements but the calculated data seems reasonable with respect to the published params so not sure what is going on.
  13. 3ll3d00d

    Othorn - HT capable?

    IIRC some people have used https://dbxpro.com/en/products/driverack-venu360 with high sensitivity (horn) based designs without noise issues so that might be one choice. If you intend to use a PC for the DSP then interfaces from the likes of motu, RME, lynx should do the job. re headroom, it depends what you take as the baseline so it's hard to say. Clean output at 20dB peaks above average level is probably a not unreasonable figure. I would be inclined to say that the ability to integrate the subs with the mains will be more important than headroom though obviously you really want both.
  14. 3ll3d00d

    Othorn - HT capable?

    headroom is always good of course but, as far as I can see, you are not talking about challenging listening levels ("occasional bursts to 110dB"). This may be worth bearing in mind as you decide on what to build. re the HPF, I assume you're talking about a passive high pass filter. Of course such filters are expensive and/or impractical so the question is why use a passive filter?
  15. 3ll3d00d

    Woofer for 40-250Hz?

    Lead times only about a week atm apparently
  16. 3ll3d00d

    Woofer for 40-250Hz?

    not a bad idea, needs a bigger box though really
  17. 3ll3d00d

    Inductance modelling

    you can import the measurement into REW and let it calculate them for you. This is probably a nice thing to add to all the driver measurements from data-bass.
  18. 3ll3d00d

    Inductance modelling

    I see he's released a build with this feature in -> http://www.diyaudio.com/forums/subwoofers/119854-hornresp-post5404994.html
  19. 3ll3d00d

    Woofer for 40-250Hz?

    actually it's probably more like 16mm or so clearance so a bit tighter than I thought, I guess I'll just have to buy one and give it a try to see what happens I did start looking into 12" woofers (in order to find a shallower one) though anyway the B&C 12NW76 (http://www.bcspeakers.com/en/products/lf-driver/12-0/8/12nw76) seemed somewhat on paper (shorting ring, seems like similar motor strength) albeit models with much more midrange(which I won't be using). I'm never quite sure whether to use xvar or xmax from the b&c specs though. the BMS 12N804 (http://www.bmsspeakers.com/index.php?id=12n804_overview) was another one that looked promising a comparison from hornresp models with EQ applied to use up the 200W on offer while keeping within xmax (vs the 15n840) https://imgur.com/C3qXkV1 anyone with any views on any of these? (or any of the other 12" drivers for that matter)
  20. 3ll3d00d

    Woofer for 40-250Hz?

    I've put together the cabinet for this (pretty simple sealed box) and run into a possible issue due to my depth constraint, if I stick to that constraint then I'm only going to have a shade under an inch (~23mm) clearance behind the pole vent. I estimate the diameter of that vent is ~60mm. I will not be running this really hard, well under rated power, so I have a feeling I can get away with this with no real negative impact (even if it's not ideal). Any views?
  21. 3ll3d00d

    New additions for db site (need feedback)

    it sounds like the same feature but with different access controls unless I'm missing something so I'd vote for both, if forced to choose then I would go with the "official" custom systems
  22. See http://www.hometheatershack.com/forums/rew-forum/61149-group-delay-graph-how-add-lines.html
  23. the measurement graphs are not loaded due to an https page requesting js over http error is Mixed Content: The page at 'https://data-bass.com/data?page=system&id=112&mset=124' was loaded over HTTPS, but requested an insecure script 'http://ajax.googleapis.com/ajax/libs/jquery/1.6/jquery.min.js'. This request has been blocked; the content must be served over HTTPS.
  24. I don't think I've ever seen a way to do that, you could export the data though and use some external app to produce your own chart for an arbitrary time period
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