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Old 22nd February 2008, 07:27 AM   #11
APLJaK is offline APLJaK  Canada
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Default Re: Start with the limiting factor(s)...

Quote:
Originally posted by discreteouts
The most important questions to ask yourself before starting any project are, "How much am I willing to spend and how much can I afford?". I always ask my clients those questions first. From custom autosound to custom PC builds, from kitchen renovating to building a garage, those same questions are first in every case.
There are many fine "budget" projects, and there is simply no limit to the other end of the spectrum. When building a sub, beyond expense, size is probably the next limiting factor(And don't forget the Wife). Beyond that is probably the "skill" level of the maker and the availablity of tools.
There is virtually no limit to driver selection, XOs or Power, so don't start there.
Let's Review
1.) $$$
2.) Size(Wife)
3.) Skills/Tools
4.) Let's design this sucker
5.) Breakout the wallet
6.) Let's build this sucker
7.) It's done=Bliss or disappointment
8.) Regardless of the outcome of "7", start drinking(If you have not already).
9. )Next!
Actually, I had the order something similar to:
1). wife (you want to do what?)
2.) drink
3.) $$$
4.) wife (it's going to cost what?)
5.) drink
6.) design (thank goodness for the internet and diyAudio!)
7.) build (can already build nice cabinets!)
7.a) drink
8.) Hope like hell it works as intended or....
9.) wife (how much did that end up costing?)
10.) even if it works, see number 9 above.
11.) drink

BTW, I may be optomistic in thinking that I can get away with a 3 cu. ft. cabinet. However, if I build it to look like a piece of furniture, perhaps I can sell it? I am thinking that bigger is better and 3 cu. ft. should be (more than?) big enough to make the stereo and video come to life?
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Old 22nd February 2008, 11:08 AM   #12
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Join Date: Dec 2007
Default Sub....terfuge..

If the floor beneath you is hollow(basement, crawl space), you can build an enclosure beneath the floor and open it to the room with a large floor register/grate(i.e. HVAC return grate). These come in all styles from wood to solid brass. The pictured one is rather small, but these can be had with an area suitable to a 15" woofer. If you hide the enclosure beneath the floor, you can make the box as big as required, heck, even 30 cu ft. if necessary.
An infinite baffe sub may also work well in this case.
Keep in mind that in some cases, a single point sub(one sub) may cause a serious "null" in a large room, specially if you cannot mount the opening just anywhere you please. In that case, two subs will usually correct the null(Null=Bass is strong over here, but weak over there).
The wife/boss should care much less about the size of the enclosure if she cannot even see it(when was the last time she entered the crawl space?).
BTW The floor joists themselves may create two sides of your enclosure, the floor the third, so you would only need to provide the fourth side and at least one end cap. Most floor joists are 16" on center(If I remember correctly), so you can start with that. Have fun!
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Old 22nd February 2008, 03:36 PM   #13
Speakerholic
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Quote:
Originally posted by Mikey p
The closest to you would be Creative Sound Solutions in Abbotsford, B.C.
http://creativesound.ca/
The SDX15 ia an excellent sub. They also sell plate amps.
Quote:
Originally posted by JRace
If you want a good localish sub, go with the SD from creative sound. Good price. They also have the amps you may need.
Yes, Bob is a good person to deal with. He has always been very accommodating with me. The SDX15 is a fairly new design and incorporates the XBL^2 motor system.
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Old 23rd February 2008, 02:42 AM   #14
dangus is offline dangus  Canada
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Location: Vancouver Island
That Subduction 15" should be "adequate" for all but the criminally insane. So I'd get two.

Plate amps don't strike me as good value for money. Instead, cruise the pawn shops, classifieds, and eBay looking for used pro or home power amps. Maybe a new Behringer EP-2500, although prices seem to have gone up from what they were a couple years ago.
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Old 23rd February 2008, 02:51 AM   #15
jeff k is offline jeff k  United States
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Default CSS SD12 Sub with baffle

You can get the CSS SD12 12" subwoofer with an amp and a CNC baffle at www.occamaudio.com
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Old 23rd February 2008, 06:01 AM   #16
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Default Re: CSS SD12 Sub with baffle

Quote:
Originally posted by jeff k
You can get the CSS SD12 12" subwoofer with an amp and a CNC baffle at www.occamaudio.com
That might make sense if Kelowna wasn't a short drive (~3 hr) from Bob's. Besides the Occam baffles are MDF. Seems a waste of energy to ship the driver to the USA from Abbotsford then back across the border to Kelowna.

Both the SD12 & the SDX15 simply use 2 pieces of 3/4" with an appropriate hole in them. The hole in the outer piece acts as the rebate.

Both of these are excellent, and even the 12" moves a lot of air (in my big room, a pair of SDX7 does a credible job).

I would recommend the sealed boxes -- the purpose of the vented boxes are for HT people that want a big bump at the bottom.

dave
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Old 23rd February 2008, 12:26 PM   #17
CSS/XBL is offline CSS/XBL  Canada
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Hi,

The Occam products are available from CSS for Canadians as the website makes clear. We try to minimize shipping cost wherever possible.

Bob
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Old 24th February 2008, 03:39 PM   #18
APLJaK is offline APLJaK  Canada
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Quote:
Originally posted by dangus

Plate amps don't strike me as good value for money. Instead, cruise the pawn shops, classifieds, and eBay looking for used pro or home power amps. Maybe a new Behringer EP-2500, although prices seem to have gone up from what they were a couple years ago.
OK, so here's where I show my ignorance (again!). Assuming I find a suitable amp, do I simply hook it up as Sub Out from my HTAmp to a Line In on the Sub Amp? Then I would drive the Sub from the speaker out of the Sub Amp. My understanding is that the Sub Plate Amps take care of the frequency cross over.....I suppose I will have to take care of this myself if I follow the advice from DANGUS? ....and this means that I need to design/build/buy a suitable cross over for the sub? I am intrigued by the idea of using another component amp for the Sub, but will need to figure out exactly what this involves as the plate amp (or a dedicated sub amp) certainly seems easier.


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Old 24th February 2008, 03:40 PM   #19
APLJaK is offline APLJaK  Canada
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Join Date: Feb 2008
Quote:
Originally posted by Bob Reimer
Hi,

The Occam products are available from CSS for Canadians as the website makes clear. We try to minimize shipping cost wherever possible.

Bob

Thanks Bob

I will likely be contacting you - after I figure out what I am doing....

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Old 24th February 2008, 05:41 PM   #20
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Quote:
Originally posted by APLJaK
OK, so here's where I show my ignorance (again!). Assuming I find a suitable amp, do I simply hook it up as Sub Out from my HTAmp to a Line In on the Sub Amp? Then I would drive the Sub from the speaker out of the Sub Amp. My understanding is that the Sub Plate Amps take care of the frequency cross over.....I suppose I will have to take care of this myself if I follow the advice from DANGUS? ....and this means that I need to design/build/buy a suitable cross over for the sub? I am intrigued by the idea of using another component amp for the Sub, but will need to figure out exactly what this involves as the plate amp (or a dedicated sub amp) certainly seems easier.
A modern HT amplifier will have a subwoofer out which has a low pass (cross-over) function applied to that. In addition the plate amp will have its own crossover. So you actually have 2 XOs (for this situation you just turn the plate amp XO all the way up -- some may allow you to defeat the XO.

dave
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