Fatmarley

Wammer
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About Fatmarley

  • Rank
    Wammer

Personal Info

  • Location
    Gloucestershire
  • Real Name
    Matt

Wigwam Info

  • DAC
    Modified CA Dacmagic
  • Pre-Amp
    Little Bear passive
  • Power Amp/s
    Modified Quad 306
  • My Speakers
    DIY
  • Trade Status
    I am not in the Hi-Fi trade

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  1. It would depend on the excursion of the drivers - how loud you play when running in, and how much low frequency content is being played. Obviously if you only played female vocals whilst running in, the bass driver would be doing very little. If they were only being played quietly, the spider is still going to be stiff on transients, or when played at a louder volume. Cranked up with a bit of drum & bass for an hour does the trick. I actually use low frequency sweeps or tones for my diy speakers, but got told off for recommending that on here a while ago (it's surprising how hot a driver can get when you're blasting it with a constant 20hz signal for an hour, so not recommended if you can't control the volume knob). Iv'e measured the thiele small parameters before and after running-in, and they do change.
  2. New speakers can sound thin. Give them a good blast of deep bass for an hour or two. As said previously, closer to the wall and / or corners is worth a try. If that doesn't work then a subwoofer or upgrade to the Cornwall should do it.
  3. I wonder what Tannoy would sound like compared to the latest version of the Klipsch Cornwall. The latest version is supposed to be a good bit better than the older model.
  4. I never liked Dynaudio speakers from the 90s, finding them dull in the midrange, even though they usually measure very well, but I haven't heard the modern ones. Saying that, I've heard enough speakers to realise that plastic speaker cones aren't for me (Instruments like electric guitars always sound a touch soft), but I realise that some do love them, so YMMV.
  5. Oh, another thing that may be relevant is that when you extend the low frequencies, you trade efficiency for low frequency extension, So bass could end up deeper but lighter or with less punch. Just wondered if the mid and treble horn have any adjustment? If not, an adjustable L-pad on both may help.
  6. Unfortunately I can't model hybrid designs, only ported, but the good news is this driver is capable of producing relatively deep bass. 163ltr tuned to 36hz (2 x 4" diameter x 6" long ports) is about the same sort of low frequency tuning I'd use with my own speakers. Obviously being hybrid means the ports may have to be a different size to achieve the same frequency response. Here's a model. The grey line is 163ltr, the black line is 116ltr - The software doesn't allow me to model exact volumes (114ltr), but it makes very little difference in reality. I left out room gain in the model because it doesn't show us much. 163ltr looks much better than 116ltr to me, and this is what I'd personally go for.
  7. Oh, and cabinet width and woofer diameter.
  8. I'd be amazed if anyone could model that for you, but If others have had success with adding a ported cabinet, maybe best to just give a try. What are the woofer specs? I could model a ported enclosure to see how low it could go. I would also need to know how high is the woofer off the floor and your room dimensions (length width). Is it a sealed room or open plan?
  9. 8" 2-ways can sound very good, but that driver has a nasty breakup peak that would worry me. If the measurement is correct it looks like it's not got enough BSC either (baffle step correction), so may sound a bit forward or lacking lower frequencies. Tony Gees Plutone looks much better to me, but that tweeter is very expensive... http://www.humblehomemadehifi.com/download/Humble Homemade Hifi_Plutone.pdf
  10. It's surprising how much improvement you can get from just adding dynamat to the doors. In most cars I'd argue that's the biggest bottleneck. You could fit the best speakers in the world, but they will sound terrible if the are not properly sealed.
  11. I've only owned one pair of brand new speakers (kef coda 8) with those, the low frequencies were lean to start with, and over a short period of time (an hour or two) seemed to produce a wider soundstage as the lows filled in. I know most people don't care about measurements, but I know through designing and building my own speakers that I couldn't live with a speaker that had an on-axis frequency response as shown in Stereophile. It looks all bass and treble.
  12. Your measurements look far better than Falcon Acoustics Ls3/5a - https://www.stereophile.com/content/falcon-acoustics-ls35a-loudspeaker-measurements Being such a small speaker, you should be able to get accurate far-field measurements quite close up. I'd try at about 19" away from the baffle with the speaker raised up halfway between floor and ceiling, and brought out into the room. Reversing the polarity of either the woofer or tweeter could also be interesting. I think I read somewhere that the Ls3/5a uses a 3rd order acoustic crossover, so reversing the polarity shouldn't cause the usual dip at the crossover frequency that you get with even order filters. Would be curious to see if that's true.
  13. I'm on my phone, so can't check properly. Ql, I use 40 because I build my enclosures air-tight and Qa 120 because you shouldn't need stuffing in a small subwoofer enclosure. Your ports are 16" long, so you'll need to tune higher until they're 11" unless you plan on extending them? You may want to Google series vs parallel because some say series doesn't sound as good. I've also read that the signal isn't distributed evenly with a series connection, but I don't know how true either of those statements are.
  14. The resistance of 8ohm woofers is usually around 5 to 7ohm, so they can't be 8ohm woofers. Probably more like 12ohm. The 16 to 17hz bump is caused by a combination of the artificial room gain that I added (Just a guess based on my room dimensions) and the very low (21hz) port tuning frequency. The software I use is free but you need Microsoft Excel to use it. It's Jeff Bagby (Rip) Woofer Box Model and Circuit Designer.
  15. Actually looks pretty good with two ports blocked. Port tuning frequency is 21hz and as a result, you get a flatter frequency response down to 20hz, and cone excursion is way down even with 150w. With the low port tuning frequency, port chuff isn't a problem either.