My Current Project...(Teasers...)

[rpb]

I've got one last x-over sim for you, in case down the road you want to experiment.

[rosemartine]

Hey mattp,
Good work it is.It's looking nice.

[mattp]

After life getting in the way, weather and moving my listening room around I finally got started on the subs a couple days ago. I am to the point in this project where I am pretty well over MDF dust.

Little tip: If you can manage it, buy your MDF in full sheets and cut it to manageable sizes with a circular saw and a home made zero clearance track. It will cost you about half of what four handi-panels cost and you will end up with far less scrap. The track was some leftover plywood I had laying around, took about 5 minutes to make and is accurate and repeatable, so a nice tool to have. Plus, circular saws are cheap. I usually cut them about 1/4" large and do a final size cut on the table saw.

[mattp]

I dreaded cutting the holes in the braces even though I have done far more in the past. I considered doing this outside (and wished I had). The final eight holes I need to cut will be done outside, as well as the sanding and final edge routing.




Like with the bookshelves, I cut narrow dados in the top and bottom panels of the subs so the bracing would be spaced right and would mean much easier assembly. It takes a few extra minutes to cut these but it is worth it.



Did I mention I am over dust? I decided at the start of this project my shop was just going to be caked until it was done. I cannot wait for a relatively windy day when I can just open up the doors and go to town with the leaf blower. My chainsaw sits under my main work bench to give you an idea.

[mattp]

Forgot to mention -

These will be double thick like the bookshelves and in case you missed it, will house two RSS315HFA-8 subs in each, dual opposed.

I also decided that I will repaint the stand tubes, likely a dark graphite matte, or a matte hammer tone if I can find it. That may not be for a while since those were a bit of a pain and I don't feel like revisiting that yet lol.

[mattp]

READY FOR PAINT...

Well almost. I need to rout the recesses for the speakons first. That and coat number 1 are happening tonight. I am so glad I'm done with major routing work. I decided to use both chamfers and roundovers to try and match the angles of the cabinets and roundness of the stand tubes. These will be black anyway so matching wasn't really something I was concerned with from the start.

These weigh a ton and I haven't even mounted the woofers yet. Me likey.

[mattp]

[djg]

What a tiny picnic table.

[mattp]

Finally...I am so glad those are done. I have never spent this much time on one of my projects before but it has been worth it.

Still tweaking everything, dialing in the sub DSP and gains to get things matching up well. So far with some quick measurements from the LP these are reaching 9 Hz with no boost applied, only cuts. After a few hours of fiddling I found a Basstronics song that has some solid 14 Hz tones in it (confirmed with Omnimic) and output levels at the LP were 108 dB (@ 14 Hz) and the system wasn't really trying at all, the subs were moving maybe 3/4" P-P. In fact it didn't seem loud to me, I just decided to check levels out of curiosity.

Granted this is a smallish room. But it is what I have to work with and so far I am loving it. Clean infrasonics are a strange thing to behold. It's like experiencing top fuel drag racing in person, you just can't explain it to someone with words.

I will post some in-room measurements when I get a chance.

And apparently pictures once I get home since they are all corrupted and I cannot post them right now.

[mattp]

Is anyone else having issues uploading pics? I keep getting a corrupted file error and I'm doing the same thing I've been doing for weeks. I even took a screen shot of the pics to see if that did anything and no luck.

I have been doing more fiddling. Seems like the subs are getting sort of close to peak geometric Xmax at 14 Hz and 112 dB at the LP. Being familiar with these woofers I'm sure there is a little more available but... I really don't need it. It is very nice knowing I have the headroom available. The amp hasn't broken a sweat yet either.

So far I have cuts at 40, 80, 63 and 100 Hz (all varying in level) and just 3dB boost at 20. Which isn't necessary at all but who doesn't like a house curve? I sure wish I could upload finished freakin pics. This is annoying.

Also, my pre allows me to HP the mains anywhere from 50-250 at the line out so they are only playing to about 80ish. It also has the same variable LP for the subs through the XLR out.

Nutshell: This system is playing from ~9-15k at output levels exceeding 110 dB. Whoever said most music doesn't play below 40 hasn't heard music that plays below 40. And there is a lot. And yes, I preached that for years as a tech.

[a4eaudio]

Hey Matt, you may have already seen in the main forum but everyone is having problems uploading pics.

[mattp]

Yay pics work again!!

Here are some final shots. I am going to be making another small change to the XO's hopefully tonight. I would really like to get everything buttoned up.

[mattp]

A couple more beauty shots. I am planning on painting this room and adding more treatment in the near future. The black on white is a little too much contrast for me (the curtains came with the house and I didn't paint the trim).

[Chad2]

Such and awesome build now you need a 4K projector so it can also be a theater

[mattp]

Such and awesome build now you need a 4K projector so it can also be a theater

This is my dedicated music system so 2.2 only. I have a *smaller* more humble 7.2 system and a 4k 65" for movies and everything else. Thanks for the compliments!