2 Wolfhorn SDX’s as a riser - AVS Forum
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post #1 of 58 Old 09-07-2011, 12:55 PM - Thread Starter
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Hi all I have been working on two of these
http://www.avsforum.com/avs-vb/showthread.php?t=1275278
I have to thank Oklahoma Wolf for the design and the detailed post on construction.
These fit the bill very nicely in terms of frequency response and cabinet size.
The build went pretty well, I didn't take many pictures though.
Now on to the picks,(sorry they are all crappy phone picks)
Sense I was building two cabinets I made a template to drill all the speaker mounting holes

me during the build

one almost complete

both almost complete

here they are just about to go in the house


I am going to listen to them for a while and decide where I want them to be placed at before I complete the riser.

here is the room they are going in

Thanks for looking
Erich
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post #2 of 58 Old 09-07-2011, 01:17 PM
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Wow - those went together way quicker than mine did. Can't wait to see what you think of them

Any questions, just ask.

Make sure you run a 16Hz sine wave through them at around 15V or so for leak testing before really letting them rattle the walls.
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post #3 of 58 Old 09-07-2011, 01:23 PM
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Great!!

I too look forward to your impressions.
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post #4 of 58 Old 09-07-2011, 01:48 PM - Thread Starter
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I had help, picked up the wood Friday and laid out both panels.
Saturday we cut all the wood
Sunday we got both boxes built except for the last piece.
Monday I installed the last piece on both boxes.
I went through 3 ¾ small tubes of PL so I think I am OK leak wise.

Now for the questions
Where did you get your 16hz sine wave? I have looked but not in the right places.

I tried to download the DVD from the top of the page with no luck, guess I will try again.

About how many watts is 15V? I am running both cabinets at 8 Ohms off of a 200 watt per channel amp (ADCOM GFA 555) I could bridge it and run 1 cabinet at a time to test for leaks.

I need to get another amp just need to decide which one and how much power.

Thanks again Erich
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post #5 of 58 Old 09-07-2011, 01:57 PM
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Quote:
Originally Posted by FUN4ME View Post

Where did you get your 16hz sine wave? I have looked but not in the right places.

The free audio editor Audacity has a waveform generator. In the menu you have Generate -> Tone. There you can make a sinewave.

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post #6 of 58 Old 09-07-2011, 02:04 PM
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I use Room EQ Wizard's sine wave generator. Works great.

Use a voltmeter across the amp's positive and negative to monitor voltage going in. 15V is really the most I would suggest... it will be over 100dB at one meter by then, and probably rattling a few things. It amounts to about 25 watts or so.

The reason I suggest 16Hz is because this is at an excursion minima... if the drivers aren't moving much, and stuff in the building isn't rattling much, you will easily hear the chuffing sounds from any leaks.

200W should push these pretty good already... I'd wait and see if you even need a bigger amp.
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post #7 of 58 Old 09-07-2011, 02:12 PM - Thread Starter
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post #8 of 58 Old 09-07-2011, 02:57 PM
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Quote:
Originally Posted by Oklahoma Wolf View Post

Wow - those went together way quicker than mine did.

Like 12 months quicker.

Very cool - I've been hoping someone would build this setup. It was on my dream list for awhile. I just couldn't make the dimensions of the enclosure work for my needs.

Please run REW sweeps at the mouth and listening positions!

"The boom is dead, long live the bass"
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post #9 of 58 Old 09-07-2011, 03:34 PM
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Quote:
Originally Posted by CZ Eddie View Post

Like 12 months quicker.

English not so good - me not understand

The boxes really turned out nice - of course, having help is not a bad thing at all.

According to the news, the big one hasn't started yet in California. What's taking so long to fire these up?
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post #10 of 58 Old 09-07-2011, 05:41 PM - Thread Starter
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I just got REW today I think it will be a while before I know how to use it.
I will have to get more stuff to run (make) graphs.

I am still at work, will be playing soon though
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post #11 of 58 Old 09-07-2011, 05:57 PM
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Sounds like a plan. You have something to use as a highpass? Though 200W isn't as likely to get the drivers in as much danger as the power I'm giving mine, anything under 13-14Hz or so with them running full tilt will still get the drivers to clank.

That said, we're talking about SPL a fair bit over 120dB above 16Hz at 1m by that point in room.
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post #12 of 58 Old 09-07-2011, 06:04 PM
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Kick ass! I have always been very impressed with Wolf's results, glad to see someone build 2! My OCD just doesnt like him using his with his other horn... but I am working on that lol. ( being OK with combining different subs )

I use NCH tone Generator, free trial download... I just uninstall/reinstall after trial. REWs gen only goes down to 10Hz, thats not low enogh
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post #13 of 58 Old 09-08-2011, 07:38 AM - Thread Starter
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No highpass, but my wife wont let me play them that loud when she is home anyway.
I checked both cabinets with 16 Hz and found all to be well.
I don’t think I have ever heard (felt) anything that low and loud before.
Very happy at this point. Only played games last night movies later this week
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post #14 of 58 Old 09-08-2011, 07:52 AM
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In that case, go easy on them until you know how much they'll take without clanking the coils. You might be ok with two of these beasts, but you will likely be hearing some second order distortion. I'd suggest a MiniDSP if they start getting into trouble... cheapest, best option for both highpass and EQ.

Glad to hear they came out leak free and they're already making you happy
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post #15 of 58 Old 10-10-2011, 09:21 AM - Thread Starter
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I thought I should update this. I have listened to these subs in multiple locations. I tried mouth to rear facing the fireplace, with the mouth to the corners and with the mouth to the front as they are currently.
Here is the room they are going in

Started by laying down some roofing paper, then built the riser on top.

Filled the riser with insulation and added more roofing paper to the top of the subs before adding the top

Here is the last one for today, in keeping with the DIY I installed the carpet myself. I still have the stairs to finish, when I do I will update again
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post #16 of 58 Old 10-10-2011, 09:34 AM
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Looks great!
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post #17 of 58 Old 10-10-2011, 09:58 AM
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Very nice indeed... wish my room looked that good.
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post #18 of 58 Old 10-10-2011, 10:14 AM
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great build!

Matt

"The main reason Santa is so jolly is because he knows where all the bad girls live." - George Carlin
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post #19 of 58 Old 10-12-2011, 08:00 AM - Thread Starter
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Thanks I like it myself.
So I finished up the steps, I think they turned out pretty well.
The carpet was relocated from the dining room where we put in wood floors.
It is hard to see but there are lights under all the steps.
The gray in the middle is spandex to keep the kitties out of the maze.
Chairs go in tonight, then it is back to watching movies.
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post #20 of 58 Old 10-12-2011, 08:06 AM
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Very nice work there. Good idea on the grille - I'd hate to be a kitty stuck in one of those things when they start making noise.
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post #21 of 58 Old 10-12-2011, 10:56 AM
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Very cool. I love the implementation.
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post #22 of 58 Old 10-12-2011, 04:49 PM
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Perfect place for large horns....very nice!

Who will be the first to do a 10Hz version???

JSS
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post #23 of 58 Old 10-12-2011, 05:05 PM
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Quote:
Originally Posted by maxmercy View Post

Who will be the first to do a 10Hz version???

Not me. Although I will confess to a temptation to try for a Wolfhorn Extreme. It would have to equal two of the SDX horns in roughly the same space (or a little bit larger) to be worth my time. I do have some driver candidates in mind though. It would use 12's or 15's.

That said, I don't need to do another one and my financial situation is not good enough to try, so it's not a priority at all.
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post #24 of 58 Old 10-12-2011, 06:28 PM
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10Hz is pushing horn design. Octaves come way too close to eachother down low...

Any measurements on the riser build once the chairs are in?

JSS
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post #25 of 58 Old 10-13-2011, 08:23 AM - Thread Starter
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No I just moved the chairs in last night.
I still need to learn how to use REW, get a sound card to support it,
a mike or spl meter and what ever else is necessary.
Guess I should go read up on REW.
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post #26 of 58 Old 10-13-2011, 09:50 AM
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Quote:
Originally Posted by FUN4ME View Post

No I just moved the chairs in last night.
I still need to learn how to use REW, get a sound card to support it,
a mike or spl meter and what ever else is necessary.
Guess I should go read up on REW.

Behringer makes the uca202 which is like $30. Grab a rat shack analog spl for $45 and some cables and adapters and your in business. You need two single RCA cables that are long enough to go from the spl meter to computer. Then computer to receiver. You also need a 1 female to 2 male RCA adapter. It should be around $80 to be up and running and it's a great tool!
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post #27 of 58 Old 10-13-2011, 10:19 AM
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The UCA222 also works, if you happen to find it cheaper than the 202 like I did.
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post #28 of 58 Old 10-13-2011, 11:38 AM - Thread Starter
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Is the UCA222 considered a USB sound card?
I would like to use a laptop, as the PC is over 50' away.
This seems to be the only SPL meter they have would it be OK?
http://www.radioshack.com/product/in...ductId=2103667

Thanks Erich
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post #29 of 58 Old 10-13-2011, 11:42 AM
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Use a panasonic wm61a. It'll run you less than $20 and be better. Lilmike has a thread about it on here.
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post #30 of 58 Old 10-13-2011, 12:04 PM
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Mr Fun, Let me guess, you are not married, right?

That is dedication to LFE for sure.
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