[thebuckaman]

This is a 16.5 cu/ft sonotube tuned to 16.5hz with an 8" sonotube port. I am using two Maelstrom-X subs for drivers. They are 24" sono tubes. This is my first sono build. The pics are of my wife standing next to the tubes, and a few build pics.

This is the extent of day one. I am trying to upload more pics so I will update. That is my wife helping me with the subs. Yeah, you read that right.:bigsmile: Hope to have the end caps installed for the port side tomorrow. Then hope to fire them up after everything is dry and cured. Didn't have a router jig large enough to do the 24" circle, so I did all of them with a Jigsaw (yuck). Had to do a lot of sanding to get it right.:rolleyesno:

 

[thebuckaman]

Put in the port side endcaps today and stapled polyfill to the top plate around the ports to try and lessen the 110hz cap to cap interaction. Going to add pics later.

 

[thebuckaman]

Wife looking through port in last pic. I have the port ends in and polyfill stapled to the ends. Just have to wait for the drying to take place. Getting closer!!!! SOON--->:hsd:

 

[thebuckaman]

My house hates me..............

Well, I couldn't wait any longer. I wired up and installed one of the Mals today and hooked it up on one channel of the EP2500 and laid it on its side (feet not on yet). I played it easy for about 15 minutes doing a quick ear tune. Then I decided I wanted to play some test tones. Started at 15Hz and then went up in 1Hz increments after that. I was playing with the level to see what kind of crying my house was going to do.

Now mind you, I am testing these out in my finished basement "bass cave" where I currently test all of the subs I build (not the final location for the subs). In the basement I have a Harman Kardon AVR510 receiver hooked to two Electrovoice ZX1 commercial speakers, a JVC dvd player, an MCM unbalanced to balanced converter, an Elemental Designs EQ.2, and an EP2500.

The house was built in 2005 and is pretty sturdy. I heard it making noises I never thought were possible. I was easing the levels up on 15-20Hz and the drop ceiling tiles in the basement bathroom were levitating! My poor laundry room shelves have emptied themselves of all of the detergent and folded clothes. The basement windows are flexing in and out and sqeaking like they want to burst.:yikes: I went upstairs and the floor was shaking so bad that if you stand flatfoot, your eyes go blurry. Needless to say the output is intense, and this is one of the two! I was able to reach the limits of the EP2500 in stereo. It clipped a few times.

The only concern I have is a slight chuffing from the port on some frequencies:scratch:. Not sure what is going on there. It is slight, and maybe I wont hear it when I eventually stand them upright. Any ideas?

I can say that I am very impressed with the output of these Mals in this configuration!:hsd:

I will keep updating as I finish the other and put it all together and EQ it.

 

[thebuckaman]

I bought a Behringer ULTRA-DRIVE PRO DCX2496 to use as an EQ. It should be here soon. I am still amazed with these subs. I am able to clip the EP2500 on music fairly easily. I am wondering if my wall AC is getting taxed too much? I am going to EQ the subs soon after I get them upstairs into the living room. I am thinking of another EP2500 too. Will I have to run a dedicated outlet to them? If so, it will be very difficult.

I was wondering if anyone else is having any permanent damage to their house with output like this? I am a bit concerned. My walls oscillate:hide:

Thanks.

 

[thebuckaman]

Hi Kev,

I am running two of the Mals in sonos, and they are unreal! You have engineered a truly remarkable driver for the price. So much so, that my wife is making me sell one of them:nono:. I am surprised she let me get this far in a way!

 

[thebuckaman]

pm sent.

18" Sono sub disguised with Bamboo.