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BEYMA 18G480 BR subbass

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GGSoundfan View Drop Down
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Joined: 16 February 2020
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    Posted: 16 February 2020 at 1:12pm
When i use WINISD beta software for build a bass reflex used BEYMA 18G480.
the specs give me the following data:
vol: 260l
Square reflex hole 14cm x 14cm  and 6,9 cm depht.

Is this correct ?

Any more suggestions or other better softw.

Thanks a lot. Wink
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Peter Jan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter Jan Quote  Post ReplyReply Direct Link To This Post Posted: 16 February 2020 at 1:39pm
BR Internal volume (and port size) depends on the combination of speaker parameters and the tuning you like to use.
You probably let WinISD calculate some “standard” tuning ? That’s fine to get you a general idea about that particular combo, but you need to fiddle with cabsize and tuning frequency to suit your needs.
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Peter Jan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter Jan Quote  Post ReplyReply Direct Link To This Post Posted: 16 February 2020 at 2:24pm
L-Acoustics SB218 used to have those 18G480 mounted, that gives you a general idea about size.
Those cabs were/are roughly 400 liters internal for two speakers. Some eq and filtering involved of course, but you see what soft like WinISD suggests is not the one and only way to go. It’s more like a start to figure out if a certain speaker is suitable for what you want it to do in terms of SPL, low-end extention, bandwidth etc. When suitability is established, than fiddling with cabsize, port(s) surface/length, power, ... starts.


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