Quote:
blaser wrote:
 Can you talk about your subs, they are certaily DIY, can you give us details about enclosure fabrication, dimensions, woofer brands.... cost maybe... |
Sure. I'm running 2 identical cabinets stacked on top of each other.
Each cabinet has an internal volume of 378 liters and is constructed of 1" MDF that is double lap jointed and screwed and glued. Internal bracing consists of 2 1" x 3" oak H-braces. Dual 6" ports, each 42" long providing for a 17Hz tune. The net volume is 336 liters. Drivers are TC Sounds PA-5000 with the following specs:
Size 18"
Vc: Underhung 4" wide, 4 ohm nom. dcr
Bl: 24 Tm
Vas 334L
Mms: 260
Fs: 22.8
Qts. 0.336
Spl: 93dB
These drivers are not official yet, so I belive mine are the first pair in actual use. I got a good deal on them, but they still set me back about $1000 each.
Here's a picture of one of the drivers:
And here's a shot of the lower enclosure prior to installing the driver showing how I had to use elbows to get my 42" port lenght:
Finally, here's how a single driver models when feed 1950W from a bridged Crown CE-2000. I'm within the excursion limit (about 75mm pp) down to the 17Hz tuning frequency. I plan to add a 36dB/Oct active HP filter to prevent damage to the drivers. This should also help with the huge room gain I have below 20Hz. Add 6dB for the 2nd sub for the potential to reach 126dB+ accoustical output from ~18Hz to ~72Hz
