Shiva-X build.....

**favelle** · **10-31-09, 04:42 PM**

Shiva-X 12" in a sonosub design. I have a 14" piece of tube and a 16" piece of tube. I can use either. The 14" is 6 feet long and the 16" is 5.5 feet long. I can cut and do whatever I want with either. BASH500 plate amp will drive it, port diameter can be 3", 4" or preferrably 6" because I have a 10-foot length of 6" already!

Any thoughts? I am thinking 150L, tuned to 19hz, 4" port @ 15" long....

Too big for this driver? Too small? If I model it smaller in WinISD, I lose a ton of output at 15-25hz..is this correct?

**Mike P.** · **10-31-09, 05:51 PM**

Quote:

4" port

Porting will depend on what amp you use.

**favelle** · **10-31-09, 06:06 PM**

Quote:

Mike P. wrote:

Porting will depend on what amp you use.

BASH500W or BASH300W...whichever one is most efficient for the build. Trying to go as low as a 12" wil allow.

**Mike P.** · **10-31-09, 06:20 PM**

6 cu.ft. tuned to 18 hz will get you there. With the Bash 500 HPF changed to 13.9 hz you'll need a pair of 4" flared ports 32" long each.

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**favelle** · **10-31-09, 06:38 PM**

Quote:

Mike P. wrote:

6 cu.ft. tuned to 18 hz will get you there. With the Bash 500 HPF changed to 13.9 hz you'll need a pair of 4" flared ports 32" long each.

Attachment 16817

How long for one 6" port?

**Mike P.** · **10-31-09, 06:49 PM**

Quote:

How long for one 6" port?

About 35.5" long.

**favelle** · **11-01-09, 12:09 AM**

Quote:

Mike P. wrote:

About 35.5" long.

Single port? Thinking about a 200L or less with 16" sonotube....

**mjg100** · **11-01-09, 09:14 PM**

I use a Shiva-X in 180L with dual 4" ports. My sub is tuned to 22 Hz, but with room gain it is around 18Hz. It is a nice clean sounding sub.

**favelle** · **11-01-09, 09:21 PM**

Nice, amp were you using?

Quote:

mjg100 wrote:

I use a Shiva-X in 180L with dual 4" ports. My sub is tuned to 22 Hz, but with
room gain it is around 18Hz. It is a nice clean sounding sub.

**mjg100** · **11-01-09, 10:35 PM**

Quote:

favelle wrote:

Nice, amp were you using?

I am using a pro amp. A nady XA-1100. Using one channel (500 watts). The second channel is being used on a 2.0 CF sealed dual 10" sub.

**favelle** · **11-02-09, 03:07 AM**

Quote:

mjg100 wrote:

I am using a pro amp. A nady XA-1100. Using one channel (500 watts). The second channel is being used on a 2.0 CF sealed dual 10" sub.

You found the mixing of 2 different subs ok?

**mjg100** · **11-02-09, 06:29 AM**

Quote:

favelle wrote:

You found the mixing of 2 different subs ok?

I use more than two subs. I have six subs, but two of them I have with my mains as bass bins. The multiple subs allow me to use a higher crossover point, which gives my small speakers more headroom. My room sounds pretty good. I have bass traps in the corners, sound panels on the front wall behind the AT screen and sound panels on the back wall. I also have panels at the side wall reflection points. I don't think I will ever go back to a single sub.

**favelle** · **11-02-09, 01:41 PM**

Quote:

mjg100 wrote:

I use more than two subs. I have six subs, but two of them I have with my mains as bass bins. The multiple subs allow me to use a higher crossover point, which gives my small speakers more headroom. My room sounds pretty good. I have bass traps in the corners, sound panels on the front wall behind the AT screen and sound panels on the back wall. I also have panels at the side wall reflection points. I don't think I will ever go back to a single sub.

Nice man! I want to go with a 6" port on my Shiva, but I only have 16" sonotube. I always understood that you needed the diamter of the port clearance on all sides.....even for 2 4" ports I'd need a 20" sonotube.....dang.

**favelle** · **11-02-09, 07:25 PM**

New developments! Couple friends have chipped in for my buddy and I now have access to a 7' section of 16" sonotube and an 8' section of 18" sonotube!!

My buddy is leaning towards the BASH300W because of the cost, so what is the OPTIMUM volume and port size for the driver for low-end output? 180L with a 4" port, 17" long? Or can I do better?

**favelle** · **11-03-09, 06:50 PM**

Bob at Creative Sound in Abbotsford was kind enough to give us a deal on a HPSA 500W plate amp!! So we have the amp, 540 watts, a 70" tube of 5.75" PVC for the port, and a 7' length of 18" sonotube!!

What's our optimum tune? 18hz? 19hz? 20hz? We are game for anything from 180L to 240L. Just looking for the most bang for the buck from this configuration......

**Mike P.** · **11-03-09, 08:47 PM**

200 liters tuned to 18 hz looks good. The amp has a 3rd order HPF at 18 hz.

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Here are the dimensions you would need for a 18" diameter sonotube. I'm assuming the 5.75" port is internal dimensions. Disregard the driver information at the bottom right hand side. That is just a sub in the programs database.

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**favelle** · **11-03-09, 09:09 PM**

Quote:

Mike P. wrote:

200 liters tuned to 18 hz looks good. The amp has a 3rd order HPF at 18 hz.

Attachment 16893

Here are the dimensions you would need for a 18" diameter sonotube. I'm assuming the 5.75" port is internal dimensions. Disregard the driver information at the bottom right hand side. That is just a sub in the programs database.

Attachment 16894

Thanks Mike! As usual, you go above and beyond. You, Bob @ CSS, and Kevin at DIYC have been crazy helpful. This build for my pal is only possible because of you guys.

**favelle** · **11-03-09, 09:12 PM**

Yeah, the 5.75" is internal on the PVC port. I am going to tweak it a bit by going with endcaps that are 3 MDF panels deep...but other than that, everyone will look the same. I hope to build an "amp box" for his plate amp and then we can mount it near his couch. Binding posts on it as well so he can just plug into the sub and turn it on and off from the couch!

Thanks man.

**Mike P.** · **11-03-09, 09:15 PM**

You're welcome! Are you going to do a build thread?

**favelle** · **11-03-09, 09:27 PM**

Quote:

Mike P. wrote:

You're welcome! Are you going to do a build thread?

For sure. If we don't start this week, this guy's gonna flip. You never know what those gamers are capable of either, LOL.

**Mike P.** · **11-03-09, 10:06 PM**

Sounds good!

**favelle** · **11-04-09, 01:47 AM**

Is the length of the port the ENTIRE length, or is it the length until it hits the inside face of the inside endcap?

**Mike P.** · **11-04-09, 02:42 AM**

The port length includes the thickness of the top cap as shown in the pic.

**favelle** · **11-04-09, 02:50 AM**

Quote:

Mike P. wrote:

The port length includes the thickness of the top cap as shown in the pic.

Cool, so right to the top of the OUTSIDE of the endcaps.....piece o' cake.

Does the Shiva-X have a known displacement volume. Just curious how much the driver takes the volume out of the inside of the sonosub. Like 3-5L or so?

**Mike P.** · **11-04-09, 03:08 AM**

That would be close. The displacement has already been taken into account in the sonosub pic I posted.

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