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  Topic Review (Newest First)
10-05-09 11:13 AM
Mario
Re: Shiva-x build for noob's first

Quote:
tcarcio wrote: View Post
If you look here at application 4.3 it will give you info on the Shiva build that is 5cf. http://web.archive.org/web/200410182...plications.PDF
Thanks, that's a very helpful document. Interestingly, 5cf is considered an EBS design with 18Hz tuning. After playing with WinISD I concluded that going larger would give me more output near the tunning frequency, but there's nothing terribly wrong with a box of 5cf or even a bit smaller. It's more important to get the tuning right for whatever size I eventually end up with. I'll probably end up equalizing the out of this thing anyway.
10-03-09 07:01 PM
tcarcio
Re: Shiva-x build for noob's first

If you look here at application 4.3 it will give you info on the Shiva build that is 5cf. http://web.archive.org/web/200410182...plications.PDF
10-03-09 06:48 PM
mlkmgr
Re: Shiva-x build for noob's first

double check the application notes included with the sub or perhaps start a thread here in the exodus section to get opinions. Kevin will surely chime in as will others if they believe your dimensions may or may not work. good luck!
10-03-09 03:02 PM
Mario
Re: Shiva-x build for noob's first

WinISD suggests 5.35 for Shiva, so I can trim the box a bit without sacrificing too much output.
10-03-09 12:23 AM
mlkmgr
Re: Shiva-x build for noob's first

not sure about the stuffing and how it plays into the volume, but the internal volume by my calculation minus driver, amp, and brace was 6.35 cu ft.
10-02-09 05:24 PM
Mario
Re: Shiva-x build for noob's first

Thanks, I've got the file. Seems like the box is a bit bigger than I was hoping for What's your calculated net volume for the sub? Maybe I can get away with a bit smaller box. Stuffing should be able to get me 10% extra volume, right?
10-02-09 04:00 PM
mlkmgr
Re: Shiva-x build for noob's first

Mario,
found the sketch-up file and sent you a pm if you still want it.
10-02-09 02:24 PM
mlkmgr
Re: Shiva-x build for noob's first

i will dig the file out. i hope it is still here somewhere. had a hard drive crash and can't recall if i was able to save that file. give me a day or so. if not, i can whip one up pretty quick as i still have the hand sketches i did with dimensions.

answers to your questions:

1. no port noise at any volume. i even sat close the other day when playing through war of the worlds to see if i could hear anything at high volume. good to go!

2. Accounted for sub and amp when making over-all internal calculations. the sub volume was given on the manual/product sheet that accompanies the sub and the amp i simply took the 10X10X5 dimension that houses the electronics inside the box and subtracted from overall internal volume.
10-02-09 01:34 PM
Mario
Re: Shiva-x build for noob's first

Great job on that sub, mlkmgr. I just ordered Gen1 Shiva for my future end-table sub and was wondering if there's any way I can get my hands on that Google sketch file? I'll need to play with dimensions to make it fit the size requirement for the table (leaving the overall volume the same of course), but I think I just found my design . There are a couple of questions I have though.

1. Simulation in WinISD shows that with this port size the air speed can be as high as 30 m/s. Do you hear any noise when playing at high levels?

2. Did you account for the size of the subwoofer and the amplifier when calculating the gross volume?

Overall, a job well done . Can't wait to start on mine.
09-25-09 02:48 PM
BigPines
Re: Shiva-x build for noob's first

Quote:
mlkmgr wrote: View Post
just an update as to what the issue was with the bottoming out noise is/was. i had forgotten that i had re-ran Audyssey in my onkyo and it set the sub eq at +5 dB. this was causing the sub to go over max excursion between 24-29 Hz.

after resetting the audyssey sub eq setting to zero, the sub performs flawlessly! i can crank the onkyo up to 75---too loud for my taste, but had to see where i could take it! there is a slight noise with the lowest booms but i believe that is the plate amp running out of juice and clipping. no worries at the comfortable level of 65 on the onkyo. the shiva rocks!
That sounds promising. I wonder why Audyssey is setting the sub so loud? What kind of amp did you end up using? I'll have to take a look in prior posts. It could be the amp clipping has been the culprit all along.

Mike

Edit: I see you used the Parts Express 500 watt amp.
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