After many years of various speakers and systems... up to tri-amp'ed with dual transmission line 18 inch bass and QUAD ESL mid and RTR ESL treble. [Tweeter panel was directly driven from push-pull tube plates thru coupling cap etal.] Super tweek. --------- I still found music some what compressed sounding... lacking in dynamic range. Compared to Live sound. Until I got a pair of JBL M2 loudspeakers with matching dsp x-over and iT5000HD power amps. Wow! Now there is NO compression effects from the speakers. Guess compression was in the drivers and not so much in the CD/music production. Now, I listen at 75-85dB at the listening position and peaks are up there. Easily 95-100dB spl.
Lack of dynamic range and compression is very common and should get a lot more attention in choice of speakers/amps.
THx-RNMarsh
Lack of dynamic range and compression is very common and should get a lot more attention in choice of speakers/amps.
THx-RNMarsh
Last edited:
Yes you do need to play with it. If you do, you will see one hornresp record for the driver at the apex of the horn, (Nd record) with its own chamber, and separate hornresp records for the mids (ME1 record) and yet another for the woofers, (ME2) if any, each with their own chambers and ports through the horn walls. You can activate/de-activate mid and woofer "records" while simulating the driver at the apex (Nd record) to see how they combine. You get to define XO and PEQ filters and delays....
I just shown on example result !
Hornresp can do it using multiple saved drivers. I my exemple, i got :
_12" in closed 30l as back chamber, 12L front chamber, 20cm long 50cm² front port
_8" with 10L closed back, 0,4L front chamber, 5cm port of 18cm²
_a 4" fullrange driver with 0,6L back chamber, and a 50cm²-1600cm² horn of 35cm lenght.
The 8" entry is at 16,5cm from the 4".
The 12" is put at horn end.
Got two 1rd electric high pass, and 2 1rd low pass.
Got -2,1ms delay for the 12".
All of this is computed id hornresp, and sims as shown.
Here some of my input screens of only one sim. Can only upload 10 image at time
Look at right panel parameters input, and all the stuff that can be shown using selectors (excursion1 2 3/impedance1 2 3/power 1 2 3 total.....)
Look at right panel parameters input, and all the stuff that can be shown using selectors (excursion1 2 3/impedance1 2 3/power 1 2 3 total.....)
Attachments
Last edited:
Exactly why i simulate for 108-112db at xmax ^^.
That's one of the Bjorno awesome frequent advices for low freq SQ cab.
Just to add :
Even with all his new tool, time alignement tweaking it really hard with hornresp without seeing ringing to decide what spike of a way to align with wich one of another way. We're approching real life here, and far from standard crossovers theories. Here a example, using akabak (still the same project). And from this experience, with 3 way, seeing phase is not enough to align considering the crossover and inductance delaying effect. The best i managed to sum a the same time response of the 12" woofer, and response of the fullrange to the one of the 8" filler was making starting the 12" 2,1ms before the two others ways. So got at the same time good phase track in low between 12" and 8", and not too bad between the 8" and the fullrange in low-mid range.
Having played like this have given me lot of experience that will be really useful for real-life project.
EDIT : Sorry for the off-topic ! Now, 00:57 at clock here and wake up at 6:20 for child and work tomorrow
Attachments
Last edited:
Thanks for doing a comparison. It will be interesting to see how close they model the real thing. Akabak has been pretty good for modeling my speakers. I like the interactive ability on HR though.
Member
Joined 2009
Paid Member
And some others input screen the same synergy sim
That's a LOT of options, and a LOT of parameters, but still easier, faster, and lot more user-friendly than the same sim done in akabak code...
Thank you for your 16000 words of explanation (at a nominal conversion rate of each picture worth a 1000 words)
Hi xrk971,
Up to three records are used to specify the multiple entry horn system, as further explained by 'nc535' in Post #1462.
Kind regards,
David
Bigun,
Yes, you simply buy any old used windoze computer for < $100 and set it on top of your iMac platform.
Well, that's what I did, though others have suggested many software solutions costing more than the hardware fix.
Art (now ambivalent Mac/Pc) Welter
Or a bit cheaper, simply find a step by step tutorial, download and install a oracle virtualbox machine (seems there's a compil for mac http://www.oracle.com/technetwork/server-storage/virtualbox/downloads/index.html), download a windows XP image, install it, install and open akabak and hornresp on the virtual winXP windows. 1 hour of work... Here I got a french tutorial link (with even a needed windows xp image link) : http://microzoom.fr/tuto-virtualbox-windows-xp
I did it on a windows 10 machine 64bits, to get akabak working. There's no reason hornresp would'nt work too on this virtual machine.
Before that i used akabak with wine virtual machine on a old linux computer. Same idea. Finding good tutorial is the harder thing ^^
I did it on a windows 10 machine 64bits, to get akabak working. There's no reason hornresp would'nt work too on this virtual machine.
Before that i used akabak with wine virtual machine on a old linux computer. Same idea. Finding good tutorial is the harder thing ^^
Last edited:
Hornresp can be run through Wine on Mac OS (and Linux). Akabak should also work through Wine. No need to run a full Windows installation on a virtual machine.
Member
Joined 2009
Paid Member
I couldn't get the Mac version of LT Spice to work on my Macbook Pro. Instead I used Wineskin Keeper to install the Windows version of LT Spice as a native mac app (double-clickable). Wineskin Keeper is a WINE wrapper program that turns Windows executable files into double-clickable mac apps. It works on about 80% of the Windows versions of audio design programs I've tried. A small number of programs don't work, most notably the TubeCAD ones. The best part is that its free, doesn't take up a huge amount of disk space, and if it doesn't work, you just trash the files and move on.
X if you have a moment while you are waiting for parts would you be able to run this 6" SB Acoustics woofer through your akabak sim?
6" SB17MFC35-8 :: SB Acoustics
The SD is half of the 8" but everything else looks good and the poly cone has much less break up that the paper or aluminium.
6" SB17MFC35-8 :: SB Acoustics
The SD is half of the 8" but everything else looks good and the poly cone has much less break up that the paper or aluminium.