Alright guys, I finally got my Shiva EBS done the other day. Last night I borrowed a copy of TPM. Holy smokes! This thing shakes the entire house. Anyway, where's the THX intro on the DVD? I couldn't locate it. Does it come up before the DVD menu? Thanks, Chris
Steven, Is the center tube 12" or the entire length of the port? The entire assy should be around 18". My first vote is for the 30hz boost/rumble filter theory. My second vote is for the incorrect port tune. Chris
Steve, The Velo was probably at its breaking point at 95dB. I'd be willing to bet it has some kind of bass boost around 25 Hz. The bass boost will eat up alot of headroom. Does the amp you're using with your Shiva have any boost in it? If it is one of the AVA/PE plate amps your can add a few...
Hi Guys, I just want to vent. I received all the parts I need to finish my Shiva EBS today. Unfortunately, I have to work late the next two nights and then I have company all weekend. I really doubt that my grandparents will want to help me assemble a sub. Oh well, that's life eh...
If it were me I would use one or more Shiva's in a front firing, vented EBS configuration. Your mains probably already go down into the 30-40Hz range so I'd think that you're really wanting to add to the low end of the system. The Vented EBS designs go into the teens and have a flat response...
Peter, One thing you MIGHT be overlooking is how you will attach the end caps to the tubing. I don't believe poly glues very well. I don't remember for sure though. Ask the place where you will be purchasing it. My brother made a pair of subs out of 12" pvc irrigation pipe. They sounded...
Guys, Try to us the smallest bit possible to unload the router and the bit. You will remove less material and the bits will last longer. Paul, If you get a 1/4" solid carbide spiral upcut bit it shouldn't have a problem loading up and dulling even with a zero clearance insert...
Steve,
MDF weighs 48 lbs ft^3. There's about 2.5 ft^3 in the shiva enclosure. So there's 125 lbs.
Add in a driver at 13 lbs, and you're at 138.
Add in a plate amp at 12 lbs, and you're at 150 lbs.
Figure another 5 lbs for ports, screws, glue, and paint, 155 lbs.
You'll have to figure...
Damn,I came up with a truely elegant solution to this problem and I didn't get ANY response??? Well, I guess some people just can't see the true genious in my design. :wink: Chris
Harold, I guess you're missing the point of this design. First, you can use this design for sealed OR vented. It's just that the two drivers will be in separate enclosures. Second, Mark's point is that if you're smarter than the average bear you don't HAVE to make the sub weigh a ton to keep...
Harold, Basically, the sub will be constructed of two seperate boxes whose drivers face each other. The drivers will fire into another box, aka the manifold, that will be open on the bottom. I would make the manifold at least 12" wide the drivers 6" apart so that the drivers will not compress...
Casey, Here's how you can do it. When you make the top cap for your sub, cut a step in the cap that is 2" bigger diameter than your port and 3/4" deep. Mount the port on a plate that is 2" bigger diameter than the port itself and 3/4" thick. Screw the port/plate assy to the top cap with at...
Hey Anthony, Regarding using sockets to mount the resistors and caps, you can buy "socket strips" from just about ANY decent electronics store. Even radio shack carries them. Just cut to length and solder them in. Preload the boards with a stock confiruation and let your customers swap them...
Harold, I don't know about the enclosure, but I would definately wire them in series. 2 ohms will probably smoke the amp pretty quick. They just aren't build for that. Chris
Hey Guys,
Just like the title says, Where can I download test tones?
I tried to use the ones from this site, but they are in .cda format and my CD writer doesn't recognise them as audio files.
http://www.subwoofers.org/aws/main.h...entalMaterials
Thanks,
Chris Attebery
Hey guys, I'm thinking about using two 3" flared ports instead of the single 4" on a Shiva EBS design. If I use the 3" ports how long will they have to be to retain the 18.5 Hz tune point? Also, how often do you adjust the gain on your sub's amp? I'm was originally thinking of buying one...
Tom, I'm building a box, no sono here... 3/4" mdf and maple plywood. It's gotta blend in with the cabinets or I'm not getting a sub. Know what I mean? The rotozip will probably work just fine. It uses 1/8" bits so you probably shouldn't try cutting more than 3/8" deep each pass. How many...
Adam, If you are going to build a Shiva, go to Adire's website and download the reference designs for the Shiva. They have frequency response curves, internal volumes, port lengths, etc. Then all you have to do is pick an alignment and use their numbers to build your sub. It doesn't matter if...
Tom, For the $40 I think it is worth it. The one I got, I think it's a model 260, will do holes from 2 1/4" to 18" in 1/16" increments. It is simple to use, you don't have to calculate the finished diameter every time you want to change sizes. On my Shiva EBS box I cut 3 10", 4 7", and 1 11"...
Tom, Bill is correct, ANY big box or lumber yard should have 3/4" mdf. Call around and ask for it. I bought my Jasper Jig at Woodcraft, but you can get them at Parts Express or Woodcraft online. Did you find the 6" flares, or are you just going with a straight port? Good luck, Chris
Ronnie, Funny how great minds think alike, eh? First thing I made with my Jasper Jig was a couple sub bases, one with a 1.25" hole and another with a 2" hole. That 621 router is great. It's my first, but I've used some older ones in the past and this thing makes them look stone aged by...
Hey guys, I'm building a Shiva EBS sub and I'm getting nervous over whether it will be enough for my room. I have aproximately 5000^3 ft of volume and there is an open doorway to another 5000^3+ room with a vaulted ceiling. Currently I have a Denon 1602 w/ 70wpc running a pair of Axiom...
Belgarath, The manual for my Denon 1602 suggested 1.5" on top, left and right. There's probably a similar statement in the manual for your receiver. Chris
Hey Tom, I saw a website a while back that had a Sub with a 15" or 18" Blueprint driver. Anyway, they had a 6" port that used 6" PVC and some commercially made flares. You might want to post a question about where to find the flares. Good luck! Chris