Foundation shaker

[jcparks]

The project:
A custom subwoofer in the area under the floor that currently houses the non functional furnace

A view of the space from under the house

The dimensions are 17"x26"x28" deep.
I will pull out the furnace and the sheet metal, then I will reinforce the enclosure.
The plan...
I want to keep it simple, and I want to get similar out put to my current SVS SB2000 so I am planning on a sealed enclosure made with 16"diameter sonotube. Similar to this build...
https://www.youtube.com/watch?v=9vE7znacJAU
The enclosure will be completely passive and I will buy an external amp to power it.
Giving myself the clearance that I need for feet and other such I figure I can get about 22" of 16" sonotube down there giving me approx 2.56 cuft of interior volume to play with before I drop in a driver. I can do less if I dont need that much, but tha tis my max.
Given those constraints and a budget under 500 dollars for driver and amp, do you think I can build a sub that will equal the performance of my SVS?
Here is a picture of the grate that covers the slot where it will be located.

 

[annunaki]

Why are you limiting yourself to Sonotube?

It seems that if the dimensions are squarish/rectangle that is the best bet to give you the most volume to work with. 2.5ft^3 gross volume is not much to work with in all reality. Are you looking at sealed options only in that case or are you thinking vented?

 

[jcparks]

I was thinking sonotube cause my carpentry skills are... lacking. I want sealed because my SVS is a sealed design so I want a similar sonic signature..

 

[jcparks]

I am open to suggestions as far as cabinet design... I may be able to get a cabinet maker to build the enclosure. I just have minimal experience in wood working myself, and want to keep costs low.

 

[ImcLoud]

Enclosures are easy, especially if you are not going to see it, lol...

If I was doing this and had no carpentry skills or tools, I would set a budget. Pick a subwoofer {these are awesome in sealed enclosures http://www.istonline.ca/mach5_ftw_21.html} I heard one in a 6cu ft enclosure it was IMPRESSIVE!!! So you will need a 6cu ft enclosure, measure your dimensions and figure out the box dimensions, plenty of people here to help with that.. Then make a recipe and take it to the home depot, have them cut all of your pieces {they will do this for you at the home depot or lowes, they have big vert saws and cut your wood for free around here}... Then buy some hardware and screw your box together, the hardest part is going to be the hole, which if you mark it you can do with a small handsaw and it will come out fine... I would use a compass saw MINTCRAFT JLO-0333L Compass Saw, 12-Inch - Handsaws - Amazon.com you could use a keyhole saw but they cost the same thing and this will do a better job with less elbow grease...

So that will be about it, home depots saw will give you nice even and straight cuts, post the dimensions here and I am sure someone can figure out the internal vol and bracing for you, it will be sealed so no porting, it should be easy..

I would build something rectangle and use round dowels for the internal bracing just run some round dowels {like hand railing stock} across in a couple spots, they dont take up a lot of volume and they will work well...

 

[jcparks]

All the dimensions are posted in the first thread... 6^3ft is quite a bit. I did the math at work today, allowing my self enough clearance, I estimate the most I can get being around 3.8^3ft before the driver or any sort of interior bracing is figured into equation. As for tools... I have a drill, miter saw, table saw, drill press, circular saw, jig saw, dremel, and some rotary cutter that I have never tried to use before, along with all my hand tools... So I am ok on tools, just not the experience part. I may do some smaller scale things and then try to mess with it after I get more confidence.

 

[ImcLoud]

All the dimensions are posted in the first thread....

I just read that and the budget, sorry..

 

[jcparks]

"foundation shaker" probably wasn't the best topic line... I'm not looking for massive lows and huge SPL's, I just want similar performance to my SVS so I can get that uniform bass response with a minimal foot print.

 

[ImcLoud]

"foundation shaker" probably wasn't the best topic line... I'm not looking for massive lows and huge SPL's, I just want similar performance to my SVS so I can get that uniform bass response with a minimal foot print.

SO are you going to run it with the svs? or in a different system?

 

[jcparks]

It is going to be attached to my main listening set up in the living room WITH the SVS on the opposite side of the room.

 

[ImcLoud]

Thats an HT no no, can't mix different subs, they won't compliment each other, lol.. you need another svs the same model... If you bought that one they will sell you the match to it at a discount...

 

[jcparks]

Well that takes a lot of the fun away... Probably makes it easier though as it wouldn't be that much of a problem placing the SVS in the enclosure though. I would just have to make some sor of table that raised it up about 10 inches from the bottom of the enclosure. Should I try to place it so the driver was firing straight up though???

 

[ImcLoud]

I wouldn't put the sub down there, I don't think I ever heard a up firing subwoofer.. why hide a pair of good looking sb2000's they are small and awesome... Just stack them if you are worried about floor space...

 

[jcparks]

That would be to simple its all part of my complicated plan to have the hidden home theater that blows you away!!

 

[crossedover]

MULTIPLE SUB SETUP here is a good explanation on setting up multiple subwoofers of either like or different types by Dr. Earl Geddes