shiva or tempest?

jbandpc · « **on:** 30 May 2003, 01:29 pm »

First let me say that tight, clean bass is the priority, with extension a close second. SPL is not a real concern.

If I had enough room and approval to build a 122 liter sealed cabinet, which should I choose, the Tempest (at 122 liters, Q=.707) or the Shiva (at 122 liters, Q<.577)?

Thank you for any response. I don't yet know how to interpret the information given in software.

MaxCast · « **Reply #1 on:** 30 May 2003, 01:41 pm »

Lower Q is said to offer the "tighest" bass. So I guess that means the Shiva. Have you read the white papers on both alignments? Some good information in there that may help you decide.

jbandpc · « **Reply #2 on:** 30 May 2003, 02:35 pm »

I'm just not quite ready to go the shiva route because I'm not sure what I'll give up in extension. Any thoughts on this from anybody?

MaxCast · « **Reply #3 on:** 30 May 2003, 03:21 pm »

Have you read the white papers at the adire audio site? They have charts showing the FR for ported, sealed, size of cabinets, etc.
I didn't find much difference in extension in a sealed cabinet between the too. If you want max extension then go with a ported cabinet.

http://www.adireaudio.com/tech_papers/tempest_paper.htm

http://www.adireaudio.com/tech_papers/tempest_apps.htm

http://www.adireaudio.com/tech_papers/shiva_apps.htm

http://www.adireaudio.com/tech_papers/shiva_paper.htm

JohnR · « **Reply #4 on:** 30 May 2003, 04:31 pm »

In that size box it's arguable that the Shiva has (very slightly) more extension (but less output)

Val · « **Reply #5 on:** 31 May 2003, 01:54 pm »

I agree that you should go with Q=.577, but you should also check Adire's stock of DLP12s that were custom made for the Canadian company Mirage, I believe. With the caveat that I am no DIY expert, its specs appear to me to be a bit better than either Shiva's or Tempest's, especially fs (low) and QTS (high):

DLP12 fs=16.3Hz Qts=.400
Shiva fs=21Hz; Qts=.390
Tempest fs=18.8Hz; Qts=.390

I am sure Dan Wiggins will be happy to help.

Val

JohnR · « **Reply #6 on:** 31 May 2003, 02:04 pm »

DPL12 plays de-eeep.

This might help:

http://www.audiocircle.com/index.php?topic=1296.msg10508#10508

rosconey · « **Reply #7 on:** 31 May 2003, 02:06 pm »

you might also look into going with a passive radiator if ported isnt for you.a 12 inch shiva with a 2- 15" passive radiators, saw some one did one and the specs looked awsome.