productive thanksgiving break, finished my 4x12 cabinet

Howdy all!

I've finished my 4x12+tweeter cabinet.. roughly modeled after the Aguilar Papa 412 It's loud and low - not rock club loud but more than loud enough for the music I play out(either swing or Pat Methany style jazz - no active rock band atm ) I built it to play down to a low F# (normal jazz/performance volumes, not club volumes) and it's tuned as such (slot port at the bottom). 11?-15? birch plywood: front baffle is 15 I guesstimate, never bothered to count. Pine butt joints (I was concerned about the strength of pine - worked wonderfully). It's also extremely lightweight (yet solid) - right around 70lbs. My last speaker project 6x10 was ~ 140lbs and.

I'm still working on the front speaker grill.

8ohm
12s are some older Madison Knights (http://www.madisonspeakers.com)
4" tweeter also by Madison
all electronics from PartsExpress
2 speakon connections, 14ga(iirc) speaker cable
tilt-back castors, handles are located on the top/bottom of the cabinet (not visible)
~ 10lbs of poly/fiber-fil (local craft store)
pleather wrap around covering
total height ~ 52" tall, 21" wide, 16" deep





I absolutely love the sound. I'll be taking it with me tonight to band practice so I'll report on it's performance.

 

costs: ~ $325 for all materials, ~ 30ish hours to construct

 

The specs on Madison's site aren't the same for the drivers I'm using (they're about a year and a half old if not more - the Nippon 1250 style that Madison used to resell(?)). The Fs is 33hz vs 50hz, spl 97db as opposed to the new model 100db, 200w vs 300w. They're labeled as Knights, but not the same Knights they sell now.

 

Thanks! I'm a little tall (6'6"), so the height is more natural for me.

It plays the fundamental of a low B quite nicely (30.87? hz.. I forget) - generated tones in an editing proggy on my mac as all the signal sweep generators mentioned in this forum are PC/XP only. It rolls off a bit below the low B, but notes are still decently defined (as much as anything below 30 hz can be considered 'defined'). I'm not an audiophile type and I tend to lean towards 'how it sounds' vs. 'what the charts say'. I don't consider myself as expert as Joris/Bgavin/etc regarding cabinet design, but this being my 4th (and most complex) cabinet (out of 4 total) that sounds quite unlike really poorly tuned/designed cabinets I've seen and heard, I think I've got a pretty good understanding on how everything works now. I've been able to put to use some of the maths I took in college finally, so I consider it a success.

I have an 8 string WishBass (woohoo extreme DIY!) on the way and I wanted this to work well with it.

 

Thanks again for the comments! I still haven't taken it out yet, but I will this Monday night.

updated pic w/ speaker grill

 

<img src="http://patrick.sunscapeweb.com/1.jpg" width=640>

I still have this cab, but I'm going to break it down & reuse the 10s (thinking about 2 2x10s, 2 1x10s for my EUB, etc).