4628 enclosure

[Dr.db]

Hey,

does anyone know the internal volume and port dimension (lenght & diameter) ?


Thanks a lot,
Olaf

[grumpy]

If no one else responds, happy to measure later tonight.

[Dr.db]

That would be very kind, thank you in advance!

The internal volume should be 4,5 ft³ according to the JBL literature, but I can´t find anything about the ports ;)

[Dr.db]

Thanks a lot so far ;)

[Flodstroem]

Olaf, If you missed this thread I post the link here:
http://www.audioheritage.org/vbulletin/showthread.php?33159-Which-one-is-the-best-pro-quot-box-quot-that-could-be-moved-into-your-home-for-hi-fi-use

[Dr.db]

Thanks a lot.

[grumpy]

External (ignoring corners and rear skids):
19.5x29.5x18.5" (WxHxD)

Internal (noting baffle is inset):
18.0x28.0x14.875"

2118H doghouse (subtract from calc volume):
9x8x6"

port:
6" dia
5.5" depth (rear of duct to front baffle)

all above dimensions to <1/16" accuracy

... so perhaps closer to 4.0ft3

there are at least two braces (one vertical, flat on back, perhaps 2" wide and 1/2" deep
and a smaller cross brace (front to back) that also supports the doghouse. I doubt they
are significant re volume calc ... esp when fiberglass (top/bottom/sides) is figured in.

[Dr.db]

Thank you so much, you´re a big help!

Looks like a 40hz tuning with a gentle roll of below 100hz...