bk monolith subwoofer help

[larksp]

The weather is getting better again so time to get on with it
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the parts i have are all from Bk
port, subwoofer 300watt sub.... and the 500 plate amp

i think i heard it needs about 100L in total (amp to be in the box)

the "port is port H 450"

ruff dimensions of space will be replaceing my fronts so unsure what size there be yet should not effect gap much
space in mm
D 450 x W 500
H taller than port guess maybe 600

any help on the box size and bracing... also for getting the amp in would be great

i may just gloss black it rather than the effort of veneer to much hassle... i to have tools like table saw and so on

[j.michael droke]

Originally Posted by larksp

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the parts i have are all: port, subwoofer 300watt sub.... and the 500 plate amp
i think i heard it needs about 100L in total (amp to be in the box)
in mm, D 450 x W 500,H taller than port guess maybe 600
any help on the box size...

Hi there: There are a lot of people on this site who would be glad to assist, however, you need to provide information on the driver specifications (T/S parameters), normally available from the manufacturer/dealer or best your own measurements. Not much can be done without this information... "guestimates" will leave you with a suboptimal design.
...regards, Michael

[larksp]

thank you for them reply... there have been few people that have used this subwoofer before on here... i was hoping they may comment as they already built one but may be able to give personal experience as well. or helpful suggestions.......

anyway this is the subwoofer the company made
Monolith-DF


and for the spec of the driver
Monolith Drive Unit

[GM]

Originally Posted by larksp

i think i heard it needs about 100L in total (amp to be in the box)

the "port is port H 450"

95 L net tuned to 20 Hz claimed and I figure with a 10 cm i.d. flared vent it's ~15 cm wide, so add this much space between the inside top and vent to find its inside height and once you know how much to add for the driver and bracing you can calculate the required width x depth area you have to work with.

Since a sub's pass-band has WLs many times larger than a small casing, horizontal and vertical 'window' or 'holey' braces to tie all six sides of the cab together as well as brace the driver and support the long vent is pretty much the standard these days.

GM

[larksp]

i did think think about the port to brace lol so thanks..... i guess the box will be 100L in total with amp and sub/port

the port is flared both ends same as the one that they used in the link

[larksp]

would this roughly work or is there some pictures or even vids to show.......
for the amp part im guessing i have to seal it off from the main box as in a box in a box so the amp don't get damaged

is there any online or offline programs recommended for the box i have seen a few out there dont think the winsisd any good for that or not the alpha one anyway

[GM]

Yes, you have to have an airtight cab except for the vent exit for it to perform properly: bk monolith - Google Search

I don't know of any freeware that will sim a flared vent except possibly AkAbat, but if you're using the Monolith's driver, etc., even if your cab is off a little in size shape it won't be audible at [sub]woofer frequencies.

GM

[larksp]

thanks for the reply the port the same one they are using so it should be ok on the side.. working out how much bracing ill need/want

guess one sideways and one up/down i guess

[GM]

Yeah, it's such a small cab that one each way to tie all six sides together plus brace/support the driver, vent should be plenty.

GM