|Project by Gianni||posted 02-13-2014 04:02 AM||1158 views||1 time favorited||5 comments|
Was watching the olympics and realized I never posted a pic of these. This was one of my first woodworking projects and one of the things that sparked my interest in making stuff from wood. I was a bit of an audiophile, and a physics geek through high school and college, and have always liked playing with the equations for speaker building and trying to come up with designs. Through the years I have drawn up some pretty wierd stuff, so it’s a little strange that these are so traditional.
My goal was shattering effects when watching movies and first-rate sound for listening to music. To keep response flat to 20Hz, the sub cabinet would’ve had to be nearly 8ft tall, and I didn’t think I could sneak that by the wife as “normal,” even for me. I was able to keep a manageable size and only lose a little bit of the rock bottom: this cabinet and driver are flat to ~24Hz with about a 2.5dB rolloff at 20. The driver is a Dayton titanic iii with a 1000W plate amp mounted in the back.
The design cues for the sub, with the truncated octagon, were taken from the satellite pair. These are sealed cabinet 2-ways with a pair of Dayton 6.5” woofers and a Pioneer dome tweeter. Inside there is a 2-way passive crossover at around 3.5kHz at 12dB/octave. The cabinets are duodecagons (sp?), 12 sided polygons with elongated front/back. Each side has alternating oak and birch veneers, and the stain matches the coloring of my tv cabinet quite closely.
The sub and satellite cabinets were constructed using mdf, because of it’s audio properties. The main cabinets were veneered and then solid oak tops and bottoms were added, along with mitered decorative mouldings to help break the large vertical surface of the sub. The satellites are in the 15-20lb range, being 1/2” mdf with bracing and damping. The sub is probably close to 150+ lbs, being made from 3/4 mdf, braced every which-way internally, lined with around 3-inch thick damping, plus the driver itself is probably over 20lbs, and the amp’s heat sink.
The gloss black grills are also mdf. They are removable, though I don’t think they have been off since moving them in the house.
I have been extremely happy with the looks, but the sound is spectacular. I did have to add felt pads to all the pictures and clocks and anything that hangs on the walls in the living room and kitchen, especially when playing 80’s hair metal or Grateful Dead (strange combo, yes, but again… “normal” is for posers). Whe listening to TV, they provide a solid, uniform sound without the rolloff at the bottom. Not “boomy” but there is a lot of sound on tv that you never realize is there.
Thanks for looking.