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Discussion Starter · #1 ·
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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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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Discussion Starter · #4 ·
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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Quote:
Originally Posted by FUN4ME /forum/post/20918278


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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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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Discussion Starter · #7 ·
Thanks I will look into both of those
 

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Quote:
Originally Posted by Oklahoma Wolf /forum/post/20918153


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!
 

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Quote:
Originally Posted by CZ Eddie /forum/post/20918620


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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Discussion Starter · #10 ·
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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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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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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Discussion Starter · #13 ·
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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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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Discussion Starter · #15 ·
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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great build!


Matt
 

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Discussion Starter · #19 ·
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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