Hey BASS freaks...got a new experiment brewing. I've been using these small 6.5" Taiwan subwoofers for various boombox projects & have been very impressed with their sealed box performance. I decided to try making an 8 subwoofer box using these little BASS cannons. The theory is that 8 of these would equal the same amount of cone area as 1 large 21" subwoofer, roughly but the advantage is each smaller woofer is more efficient, using a lighter, faster cone, each with it's own 2" voicecoil that can handle 80 watts RMS each...
Also, having 8 drivers working in unison uses the phenomenon of multiple driver coupling. Every time the number of drivers are doubled, the acoustic output is bumped by +3db for the same watts input. For example, 2 woofers driven by 5 watts will be 3db louder acoustically, than the same 5 watts into 1 woofer. So, having 8 woofers would have a 9db gain over a single woofer of the same characteristics. from coupling. Also, having small multiple drivers will be much more efficient than a large(21") woofer that would require a large, heavy, hard to move cone or diaphram....
Here's some pics of my progress so far & a video of the first test run will follow soon...
Here's a shot of the 4 chamber box I made of 3/4" MDF board. The drivers are already attached to the face & wired in series/parallel to present an even 8 OHM load to the amplifier..
Each chamber is 1.0 cubic feet & finished with dynamat & fiberglass insulation along the back wall
Here, the drivers are installed & the box is assembled...the divider to the left is the center of the box & will be part of a side vented chamber to be finished soon...
All 8 woofers are visible in this shot...I can't wait for the test run...
Below is the Velodyne DPS 10 plate amplifier I'm going to use to power this setup. It pushes 175 watts RMS into 8 OHMS & is plenty of power to push this extremely efficient setup...
I'm also using a very good digital Subwoofer EQ to tailor the respose & tune the setup...
Video of a test run coming soon....
Also, having 8 drivers working in unison uses the phenomenon of multiple driver coupling. Every time the number of drivers are doubled, the acoustic output is bumped by +3db for the same watts input. For example, 2 woofers driven by 5 watts will be 3db louder acoustically, than the same 5 watts into 1 woofer. So, having 8 woofers would have a 9db gain over a single woofer of the same characteristics. from coupling. Also, having small multiple drivers will be much more efficient than a large(21") woofer that would require a large, heavy, hard to move cone or diaphram....
Here's some pics of my progress so far & a video of the first test run will follow soon...
Here's a shot of the 4 chamber box I made of 3/4" MDF board. The drivers are already attached to the face & wired in series/parallel to present an even 8 OHM load to the amplifier..
Each chamber is 1.0 cubic feet & finished with dynamat & fiberglass insulation along the back wall
Here, the drivers are installed & the box is assembled...the divider to the left is the center of the box & will be part of a side vented chamber to be finished soon...
All 8 woofers are visible in this shot...I can't wait for the test run...
Below is the Velodyne DPS 10 plate amplifier I'm going to use to power this setup. It pushes 175 watts RMS into 8 OHMS & is plenty of power to push this extremely efficient setup...
I'm also using a very good digital Subwoofer EQ to tailor the respose & tune the setup...
Video of a test run coming soon....