Jump to content


  • Posts

  • Joined

  • Last visited

  • Days Won


Everything posted by peniku8

  1. Here is the requested comparison, I included the 5 most prominent drivers for this cab. It already looks like a small mess, which is why I didn't include more.
  2. Since Ricci didn't measure the SKRam cab yet, the data isn't as perfect as the SKHorn's. I can could these graphs for the latter thou. At least with the most popular half a dozen. I won't include all the RCF and 18sound ones, that would just be TMI for an overlay
  3. Yes there is, it's just not public. The stats are a little worse compared to the 1 Ohm thou. You can only get the 2 Ohm IPAL as commercial customer I guess
  4. @droogne when you double click the Le input, a small window appears where you can enter the complex inductance parameters. When you turn those on, 'Le' will turn green to indicate that you're simulating with CI. I have set up my driver files to automatically load these for maximum convenience; I can attach the files here if needed. I overlayed the graphs with Photoshop. The street price on the Eminence looks to be still almost twice the price of the LaVoce, plus it's very heavy. It gets within .5db of the IPAL thou, so basically equal to the 2Ohm IPAL I guess.
  5. In the acoustical power window hit ctrl+M and enter values there.
  6. @SME Check out iZotope's Ozone Exciter. It's basically the plugin that you're describing. It simulates different types of tube, tape and other distortion. It's just the nice type of distortion which is called saturation nowadays. It is very powerful but also very resource hungry, a few instances of it in a mix already max out my 4 core Xeon CPU. I feel the same about mp3. People with inferior knowledge talk down on mp3 because they just know the early stages of Fraunhofer or have only heard 128kbps files. In fact, when doing it properly (with VBR lame, slow encoding) you can make 128k mp3 almost transparent on most speakers/files. I listen to metal mostly, which is basically the worst case scenario for any compression algorithm (broad spectral content, low crest factor), and all of the files on my phone are converted to 140k VBR with my favourite audio converter dbPoweramp. If you convert from a very good source, that will be transparent on any usual pair of headphones with a given ambient noise around you. I was only able to identify 2/3 of the wav vs 320k files in a DBT correctly, but I'm eager to try this again when I built my new speakers with Ribbon tweeters.
  7. @droogne that's a lot to reply to, I hope I manage to catch everything posting from my phone. The 2nd graph I posted shows the maximum output of the cab/driver combination which is either Xmax limited or power limited (depending on frequencies). I killed the colours for the B&C drivers, but the LaVoce graph line is two colours: green for power limited and red for excursion limited. You'll see that the graph is red from 0 to 29Hz and green from 29 to 38Hz. That correlates to the excursion minimum at the tuning frequency, so the driver hits its power limit before it hits Xmax at this frequency band in that cab. If your system hits Xmax with 50% power at a certain frequency that's okay. Unless you're running heavy limiting, program material will not contain 0dbFS sine waves. When you're far away from excursion limits using the rated AES power, it is likely that your cab is too small. As you can see in my comparison, the IPAL is about 3db ahead both in the power limited as in the excursion limited bands. I don't know how you're getting your 6db difference, but it doesn't seem correct to me, no matter the cab. How are you determining the headroom?
  8. @Droogne I don't know how you're getting to these numbers, but 3-4db difference between the SAN214.50 and the 21SW152 sounds like you're comparing them using the same voltages while using the 4Ohm version of the SW. Here is a model of one of my designs at 1Watt into Znom, black line is LaVoce, grey the B&C: Here is the max output graph (at their rated AES power, basically an excursion limited efficiency graph), LaVoce in green, SW in blue and 21IPAL in pink. Also, 650€ for the 21IPAL is a very good price, could you paste a link to that supplier? That's like the regular street price for the 18IPAL here Edit: all models used Josh's complex inductance parameters
  9. Price difference between SW and DS seems heavily in favour of the DS considering that the drivers are basically just a bit different. I mean, you won't gain any notable headroom by choosing one over the other. SW is 520$ if you buy 4 or more, DS is 420$ for 2 or more from where I can get them. I guess the prices are similar in the states when on discount? I've seen the LaVoce for 380$ on PE, so that's anyother even cheaper alternative. And the LaVoce models a bit differently, which can be great depending on the cab you're using. It doesn't show the bump in the 60-70Hz region which I sometimes see from the DS.
  10. peniku8

    Sub Advice

    Looking at the specs it seems that LF knee will be somewhere around 40Hz, so this is not a sub you'd want for movie use. If it's for music only, any PA subwoofer will deliver in your house.
  11. I'll see how much information I can sweep up, but I can tell you that a fixed HPF is present on almost every mic-pre nowadays and it is very often being used. When it comes to plugins, you almost always see Waves plugins being used. I could also imagine that removing ULF could be a part of de-noising. That is typically done in iZotope RX, which I own but have not used yet, so I can't tell if that is happening there. What I think is most likely is that the HPFs are baked into the SFX files directly, which also explains why you sometimes see a graph that looks like several different low shelves were cascaded (the result of stacking effects with different HPF points). I should go through some of my sample packs and see if these come with a HPF in place right from the store.
  12. I only know one film composer and he said he'd "stay away as far as possible from social media" since it would be consuming way too much of his time 😄 I'm more active in the music production business thou, so I don't have much insight on movie production
  13. I remember reading about a clearout sale a few months ago. The SHS would become NLA after that according to the website.
  14. The pmillet is a DIY one thou. Parts are roughly 200$ total, which includes the custom PCB from ebay. You can select your measurement range from 200mV to 200V in 10x steps and it's very clean. It basically turns your PC into and Oscilloscope if you have the right software (which I'm still looking for). You can read more about it here.
  15. In the end, audio engineers keep in mind what the average system looks like, which the mix will be played on. I'm pretty sure the average Atmos system is expected to have a beefier sub than your average consumer HT system. The mix is usually optimized to sound as good as possible on as many systems as possible, plus minus human error. Of course this is only a small factor, contributing to the whole, but it's certainly one of the reasons why low-cuts are used.
  16. All I know about plywood is that it seems that there is no low quality plywood on the German market, since whatever I buy, it's always void free etc. There are some occasional surface patches but these are really just a visual impairment. I'm currently only interested in trying out Banova ply, but the supplier I'm working with discontinued these and I haven't found any other supplier in my immediate area, which I could get a sample piece from. Still dreaming about the 100lbs SKHorn.
  17. What a funny coincidence, this device looks like a slightly less fancy version of the pmillet sound card interface, which notnyt from AVS sent me a few weeks ago. I will also use it for amp testing.
  18. I pay about 80€ for a sheet of 18mm BB (2500x1250), but why the hell is your MDF so cheap? I pay about 45€ for the same amount of MDF (19mm, 18mm MDF doesn't seem to exist)
  19. I never understood why people use anything else. The price difference is not that big (here in Germany BB is twice the price of MDF). I built a car sub for a friend from MDF and I used MDF for a current project, which I only built the prototype of. Final cabs will be from BB. That was enough for me to know that even just working with MDF is a disgrace. Especially when your shop is a basement room and your dust collection system is undersized for the table saw. The only pro for MDF, price aside, are the very clean cuts/routing results.
  20. I can't help but to think that the driver looks different from mine. This one looks more like the 18DS115
  21. Ricci also split up the bracing in the SKHorn into multiple pieces instead of using one large piece, because that leaves room for error if you're building it without a CNC.
  22. Just a small thing, but I noticed some odd behaviour. My iPhone (6, running IOS 9) automatically pauses music playback when another app starts playback. That's not the case for just any audio source, as some games allow background music playback from the music app. When I load the data-bass forums via Safari on the phone, my music pauses thou. Even if theres no sound from notifications being played, this always happens when loading or reloading a page here. Music playback is usually resumed when the other app is not sending the "request audio solo token" (I made that up, hope you get my point) anymore, but for data-bass it just pauses indefinitely.
  23. While fooling around with some 18" pro drivers I found that if you wanted them to play down to 30Hz (F3, not F10), the cab required would be so big that it could also fit a 21. Since most 21" drivers cost just a tad (maybe 10%) more than their 18" equivalent, going with 18" doesn't make much sense imo. If the cab is too deep for you, you could trade some depth for height. That would extend the horn section, but you might run into issues with the port length. Maybe make it very tall and compensate for the shorter port with added back chamber volume. If it's tall enough, the horn section could also be a single segment, or well, a big segment and the small segment which opens to the front.
  24. Any surface not in the direct path of sound can be lined with foam. Since THs only have a direct path, theres nowhere to put foam. Hope you're not moving these MDF cabs around much or you won't have fun for long. New cabs also going to be MDF?
  25. Doing so wastes space. It lowers the back chamber volume which raises the tuning (ever so) slightly and decreases bottom end output. Probably by less than half a db but it's still wasted potential. Look here if you wanna get some ideas for port block solutions.
  • Create New...