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Audio Nirvana Classic 8 Bass Reflex Speaker
http://diyaudioprojects.com/Forum/viewtopic.php?f=11&t=6032
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Author:  Gio [ 13 May 2018, 08:54 ]
Post subject:  Re: Audio Nirvana Classic 8 Bass Reflex Speaker

Hi. The impedance response of the enclosure is shown a few posts back.
viewtopic.php?p=52772#p52772

From the impedance plot, the box tuning frequency is about 63 Hz. The calculated tuning frequency of the enclosure dimensions was 72Hz. The difference between the two frequencies presumably being the effect of the damping material in the speaker system.

The insulation material used was brown fiberglass R12 insulation from a big box home center. The difference between the two is that mineral wool insulation is denser and will absorb more sound. That could be the issue.
Also note that the insulation is stapled about every 4 inches so that also compresses the insulation.

Cheers

Author:  Salv [ 14 May 2018, 21:34 ]
Post subject:  Re: Audio Nirvana Classic 8 Bass Reflex Speaker

Hi mate,
Nice job they look great what are the measurements of the cabintes looking at building the same with the same drivers from audio nirvana.
Thanks.

Author:  Gio [ 30 May 2018, 21:28 ]
Post subject:  Re: Audio Nirvana Classic 8 Bass Reflex Speaker

Hi Salv, sorry for the late reply.

Please contact David at CommonsenseAudio and he will send you the plans. Almost more important than the box plans is the instructions document that describes the range of insulation that can be used, the placement and stapling it in place as it is important to get this correct for good bass. Dave had specifically asked that I don't redistribute or publish their documents and I will respect that. It won't be an issue getting the plans even if you bought the drivers used or are just considering buying.

Cheers

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