Tuba 30" or twin SPUDs? - AVS Forum
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post #1 of 102 Old 09-18-2010, 11:00 AM - Thread Starter
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Hi all,

I am starting a carpentry class on Wednesday and have to pick a project. It's either a 30-inch tuba (with the option of a second smaller 20-inch Tuba to even out the response) or twin SPUDs to use as a second row riser. It may be that limited placement opportunities mean that one is better suited to my room. What do you think? Is one a better choice than the other in this room?

Room size is 20'8" at the front wall (bottom wall on this diagram), rear wall 18', room depth 18 to 19'.

The two 30-inch Tubas in the diagram are the two possible locations.



Disclaimer: Also posted on the Klipsch forum.

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post #2 of 102 Old 09-18-2010, 04:10 PM
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By "Tuba" do you mean the THT (Tuba Home Theater)? Because if you mean the actual Tuba 30 (or T30) then that won't work well as it is a pro sound subwoofer, not a HT subwoofer.

Just trying to clarify.

Nice Sketchup Skills BTW.
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post #3 of 102 Old 09-18-2010, 04:34 PM
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there are lots of fun horn project possibilities.

small complex builds such as the anarchy horn build to large simple builds such as cowan's single fold horns.

go here:
http://www.avsforum.com/avs-vb/showthread.php?t=1104368

search on "horn". that will pull up a few ideas.

here are cowan's:

http://www.cowanaudio.com/

click on "tapped horns" in the left column.


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post #4 of 102 Old 09-18-2010, 07:03 PM - Thread Starter
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Yeah, I meant the Tuba HT...

The 18 Hz Cowan looks too big my my basement!

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post #5 of 102 Old 09-19-2010, 08:24 PM - Thread Starter
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I think I may go Tuba HT for now. I can always build SPUD risers later. It's not like they would cost a fortune to build.

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post #6 of 102 Old 09-19-2010, 10:26 PM
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i don't think you'll be building the spud after a tht. hope your s.o. is understanding =]
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post #7 of 102 Old 09-20-2010, 05:49 AM
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Just a note that you'll want to place your THT 18" from the corner of the room. The THT is a great cab! You might want to just go with a 24" wide cab as it is more friendly with wood sizes (unless you are using Baltic Birch at 60x60"). It is easier to move around (doorways and corners) and still has plenty of output.

Current HT: HTPC-->Epson 5010 projector-->135" screen, BFM TLAHs x7 & THT
Build log: DIY rotary sub for contemporary HT in 100 year old house?
Andreas' Slow Rotary Sub build
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post #8 of 102 Old 09-20-2010, 10:49 AM - Thread Starter
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I'll start with one and will build another if I have uneven bass issues. I like the frequency response of the 30-inch better and won't be moving it much. As for plywood, well if $50 of plywood is the difference then it's not so bad either.

But thanks!

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post #9 of 102 Old 09-20-2010, 11:22 AM
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Quote:
Originally Posted by psgcdn View Post

I'll start with one and will build another if I have uneven bass issues. I like the frequency response of the 30-inch better and won't be moving it much. As for plywood, well if $50 of plywood is the difference then it's not so bad either.

But thanks!

Make sure your path to the theater is through door openings that are WIDER than 30" then. I had to build my 36" wide one in the house.
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post #10 of 102 Old 09-20-2010, 12:09 PM - Thread Starter
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And you can never move it out!

Access to the basement can be through a door at the bottom of an outside staircase. It's a 90-degree turn but a small second panel to the door makes it open to 44 inches. Then there's a straight run through a 32-inch door.

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post #11 of 102 Old 09-29-2010, 10:43 PM
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"The 18 Hz Cowan looks too big [for] my basement!"

small footprint though... ;-)

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post #12 of 102 Old 09-29-2010, 10:45 PM
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also there was another guy who built a vertical horn. i forget his site. he was a european who had some crazy nice looking horn mains...painted bright orange!

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post #13 of 102 Old 09-29-2010, 10:52 PM
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volvotreter
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post #14 of 102 Old 09-29-2010, 11:00 PM
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"volvotreter"

that's the guy radman. nice pull!

http://www.volvotreter.de/th.htm

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post #15 of 102 Old 09-30-2010, 04:54 PM
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i built two of his 38hz tapped horns, thats why i remembered, and i stared at his living room pictures for months
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post #16 of 102 Old 11-16-2010, 12:42 PM
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Very interested....looking at purchasing the plans(unless someone is willing to send them to me) so I can build two 30" tuba's for my room. Any more pictures guys?
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post #17 of 102 Old 11-16-2010, 01:59 PM
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Quote:
Originally Posted by vschaos View Post

Very interested....looking at purchasing the plans(unless someone is willing to send them to me)

Publicly asking someone to commit a felony, not such a good idea.

Bill Fitzmaurice Loudspeaker Design

The Laws of Physics aren't swayed by opinion.
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post #18 of 102 Old 11-16-2010, 02:04 PM
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I'm interested too. Don't the SPUDs dig a little deeper than the THTs, but have a little less output? I assume you get the thump in your chest with both, right?

Also, the Bill's plans aren't very expensive. Just buy them like everyone else.
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post #19 of 102 Old 11-16-2010, 02:18 PM
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Quote:
Originally Posted by Bill Fitzmaurice View Post

Publicly asking someone to commit a felony, not such a good idea.

Not to stir things up too much, I am honestly asking because I don't know. (And, by the way, I respect your work and how you have made your designs available at low cost to people who want to do it themselves. In fact, I have thought about ordering and trying out some of your plans).

If person purchases copyrighted material (say a DVD or a book or plans to build a house) and another person asks for that purchased copy in an open forum and the original owner of the material is willing to give away, or even sell, their copy, is that a felony? It seems to me it would not be. If, on the other hand the person who possessed the copyrighted material posted an electronic facsimile of the copyrighted material and made it available to the masses for download without the permission of the author, either for free or for a fee, that would be illegal.

Are there any opinions from anyone who actually knows (I'll bet there are intellectual property attorneys who like to build their own speakers).

Wayne
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post #20 of 102 Old 11-16-2010, 03:00 PM
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Quote:
Originally Posted by dwomd View Post


Are there any opinions from anyone who actually knows (I'll bet there are intellectual property attorneys who like to build their own speakers).

This same warning that appears on DVDs applies to all protected material:

'The unauthorized reproduction or distribution of this copyrighted work is illegal. Criminal copyright infringement, including infringement without monetary gain, is investigated by the FBI and is punishable by up to five years in federal prison and a fine of $250,000.'

It's a slippery slope defining what you may legally do and what you may not. Better safe than sorry.

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post #21 of 102 Old 11-16-2010, 03:28 PM
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IMHO, even if you never build it, the $15 to Bill for the plans are a good investment just in terms of learning the mechanics of how a folded horn is constructed. And perfect for someone like me who has never built a folded horn, and needs step by step instructions (or at least made me more confident than if all I was going on was a picture/model).

The Low Profile version is also available, in case that form factor works better for you - it did for me (fits behind false wall nicely).
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post #22 of 102 Old 11-16-2010, 05:22 PM - Thread Starter
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I guess I did abandon this thread. I have a minimal one on Bill's site:
http://billfitzmaurice.info/forum/vi...p?f=30&t=13008
and a longer one on the Klipsch forums:
http://forums.klipsch.com/forums/t/139522.aspx
I'm getting closer to the end...

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post #23 of 102 Old 11-16-2010, 05:24 PM - Thread Starter
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I guess I did abandon this thread. I have a minimal one on Bill's site:
http://billfitzmaurice.info/forum/vi...p?f=30&t=13008
and a longer one on the Klipsch forums:
http://forums.klipsch.com/forums/t/139522.aspx
I'm getting closer to the end...

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post #24 of 102 Old 11-17-2010, 05:38 AM
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Quote:
Originally Posted by Bill Fitzmaurice View Post

Publicly asking someone to commit a felony, not such a good idea.


Sorry didnt mean anyone to commit a felony. I'll be purchasing the plans from your site either today sometime or tomorrow.

Is the Dayton RSS390HF-4 15" Reference HF Subwoofer 4 Ohm still the recommended driver for the standard THT? I also want to ask is it allowed to post pictures as I put the boxes together(I plan on building two)?
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post #25 of 102 Old 11-17-2010, 06:09 AM
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Quote:
Originally Posted by vschaos View Post

Is the Dayton RSS390HF-4 15" Reference HF Subwoofer 4 Ohm still the recommended driver for the standard THT?

It's a recommended driver because it has the right specs at the right price. You can use any driver with appropriate specs that will fit into the box.
Quote:
I also want to ask is it allowed to post pictures as I put the boxes together(I plan on building two)?

Ever been to my forum? Highly recommended.
http://billfitzmaurice.info/forum/vi...224db5083c15fa

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post #26 of 102 Old 11-17-2010, 06:17 AM
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Quote:
Originally Posted by Bill Fitzmaurice View Post

It's a recommended driver because it has the right specs at the right price. You can use any driver with appropriate specs that will fit into the box.Ever been to my forum? Highly recommended.
http://billfitzmaurice.info/forum/vi...224db5083c15fa

thanks just sent the money....question is though should I have purchase the panel jigs? I think I should have since it was only $1.95, but wasnt aware if I needed those.
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post #27 of 102 Old 11-17-2010, 06:39 AM
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I have to comment on the intellectual property conversation.
Not to anyone specific just a general rant.

Bill's product is his plans. His time and effort to develop a viable product. Create a web site, get known. I'll bet he has been pursuing this for years.

It is a shame what things are coming to.

If I hired you for your industry contacts and got that information and fired you in three months would that be fair? I paid you for your intellectual property.

T6

Clearwave 4TSE and 4CC build thread
http://www.avsforum.com/avs-vb/showt...1#post19489740
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post #28 of 102 Old 11-17-2010, 06:48 AM
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Bill,

You may want to include the dayton reference hf 12" driver to the recommended driver list. It models VERY well in a slim 15"-16" wide box. Not so well in other widths.

Caveat: I have not built one yet.

JSS
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post #29 of 102 Old 11-17-2010, 08:06 AM
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I see on parts-express they have this woofer...

Dayton RSS390HO-4 15" Reference HO Subwoofer 4 Ohm

It is the same price as the recommended. What is the difference if anything between the "HF" and the "HO"?
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post #30 of 102 Old 11-17-2010, 10:58 PM
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Quote:
Originally Posted by vschaos View Post

I see on parts-express they have this woofer...

Dayton RSS390HO-4 15" Reference HO Subwoofer 4 Ohm

It is the same price as the recommended. What is the difference if anything between the "HF" and the "HO"?

VSCHAOS.... ever cook anything>? If a recipie calls for garlic salt and you instead used celery salt, would the results be the same?

The HF and HO have different parameters, and are suited for different tasks. Google "Thiele/Small" parameters and this might help you understand a bit more.

"You take the blue pill - the story ends, you wake up in your bed and believe whatever you want to believe. You take the red pill - you stay in Wonderland and I show you how deep the rabbit-hole goes."
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