Downloadable blh calculation software.

turboyam · 22nd May 2010, 02:20 AM

I am looking for a good back loaded horn software that i can
get on the net (not nescesarely free).
I'd like to build a good, deep bass Fe208 blh.
Thanks guys!.

planet10 · 22nd May 2010, 02:41 AM

Martin King's mathcad worksheets.

dave

rjbond3rd · 22nd May 2010, 05:10 AM

1. Quarter Wavelength Loudspeaker Design
2. Telstra BigBlog -
3. AJ-Systems

turboyam · 23rd May 2010, 11:48 PM

Martin King's seems like a complex affair... Is it a calculating
software or spreadsheats that you got to calculate yourself???.
Thanks guys

planet10 · 24th May 2010, 12:03 AM

It is a set of worksheets you run in MathCad (free demo version is available). The UI is not what you call slick, but it is more capable than anything else out there (IMHO) with the exception of AkaBak (and it is really a programming language)

dave

rjbond3rd · 24th May 2010, 01:33 AM

Martin King's software is designed to be used by anybody, and it's pretty much a "fill in the blanks" process. It doesn't design the box but it's very easy to get started.

For a TL, you just need to worry about the driver parameters, and the box's area and length "above" the driver (closed end), and "below" the driver (open end). Even the OB and BLH models are pretty easy to use.

It does get more advanced if you want to model the in-room response. You specify the distance to each wall, how many degrees the box is rotated etc. But you can ignore those parts until you're interested in them.

I don't understand any of the math and physics, and luckily, it's not necessary. You can always ask questions on MJK's Yahoo group. It's very newb-friendly (I am one of the newbs).

markusA · 24th May 2010, 09:03 AM

MJK's spreadsheets are very nice and once you get the hang of it not at all difficult.
The single most frustrating aspect is imho deciding when enough is enough. What simulation is likely to result in the best sounding speaker?

turboyam · 24th May 2010, 06:27 PM

Thanks a lot guys!

i'll look into that soon!.

22nd May 2010, 02:20 AM	#1
turboyam diyAudio Member Join Date: May 2006	Downloadable blh calculation software. I am looking for a good back loaded horn software that i can get on the net (not nescesarely free). I'd like to build a good, deep bass Fe208 blh. Thanks guys!.

22nd May 2010, 02:41 AM	#2
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Martin King's mathcad worksheets. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

24th May 2010, 12:03 AM	#5
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	It is a set of worksheets you run in MathCad (free demo version is available). The UI is not what you call slick, but it is more capable than anything else out there (IMHO) with the exception of AkaBak (and it is really a programming language) dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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22nd May 2010, 05:10 AM	#3
rjbond3rd diyAudio Member Join Date: Jan 2007	1. Quarter Wavelength Loudspeaker Design 2. Telstra BigBlog - 3. AJ-Systems

23rd May 2010, 11:48 PM	#4
turboyam diyAudio Member Join Date: May 2006	Martin King's seems like a complex affair... Is it a calculating software or spreadsheats that you got to calculate yourself???. Thanks guys

24th May 2010, 01:33 AM	#6
rjbond3rd diyAudio Member Join Date: Jan 2007	Martin King's software is designed to be used by anybody, and it's pretty much a "fill in the blanks" process. It doesn't design the box but it's very easy to get started. For a TL, you just need to worry about the driver parameters, and the box's area and length "above" the driver (closed end), and "below" the driver (open end). Even the OB and BLH models are pretty easy to use. It does get more advanced if you want to model the in-room response. You specify the distance to each wall, how many degrees the box is rotated etc. But you can ignore those parts until you're interested in them. I don't understand any of the math and physics, and luckily, it's not necessary. You can always ask questions on MJK's Yahoo group. It's very newb-friendly (I am one of the newbs).

24th May 2010, 09:03 AM	#7
markusA diyAudio Member Join Date: Dec 2009 Blog Entries: 8	MJK's spreadsheets are very nice and once you get the hang of it not at all difficult. The single most frustrating aspect is imho deciding when enough is enough. What simulation is likely to result in the best sounding speaker?

24th May 2010, 06:27 PM	#8
turboyam diyAudio Member Join Date: May 2006	Thanks a lot guys! i'll look into that soon!.

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