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Old 9th October 2019, 05:00 PM   #341
JamieMcC is offline JamieMcC  United Kingdom
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Join Date: Jul 2014
Location: England (Isle of Wight)
Dave I have some observations

Test 1

8.5mm added to each side of the central vent spacer

+ Bass notes more extended and detailed

- Out of box floaty imaging completly gone

Test 2

8.5mm added to outside walls

+ Bass notes more extended and detailed

- Out of box imaging still gone but noticable improvement over test 1

Test 3

8.5mm added to the middle of each vent 2 vents now become 4

+ Bass notes more extended and detailed

- Detached out of box sound still not present but best result out of the three tests so far

Next step going to try adding some chamfers to the top edges of the 8.5mm infill pieces at the point where the sound waves entre the vent at the back of the box.

Also tried adding and subtracting some nylon fill internally best result were achieved with a light stuffing of fill in the top half section only.

Its been a fun afternoon.

Currently back to no infill pieces floaty detached out of box sound image is back. Bass not so extended and clean in comparison but the large out of box sound is beguiling.

I'm wondering maybe if the slight bass bloom is helping with the detachment of sound from speaker effect expereanced without the infill pieces.

Last edited by JamieMcC; 9th October 2019 at 05:06 PM.
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Old 30th January 2020, 11:46 PM   #342
kingfisher is offline kingfisher  Canada
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Join Date: Feb 2010
Location: Eastern Ontario CA.
Where can I aquire the design plans for a ONKEN/FONKEN design using vintage JBL 2205H woofer?

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Old 31st January 2020, 02:17 AM   #343
planet10 is offline planet10  Canada
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Location: Victoria, BC, NA, Sol III
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