• Portability: Small enough to fit in a trunk and easy to carry, under 30lb, separate amp is allowable (battery-powered)
• Compatibility: May be used with speakers ranging from speakers with 2” drivers (max 200hz x-over?) to floorstanding speakers that need help below 80hz.
• Output: With 2-inch speakers, max req would prob be 85dB. With floorstanders, 110dB capability would be balanced, but 100dB is likely as loud as I’d ever use considering the application. These are 1m figures.
• Extension/response: After extensively checking through my music collection, response at 32hz is important. However, as long as the 32hz response is still usable (as in EQ can be used to bring up), then unaided response to 36-38 is okay.
• Idiot Resistance: I want protection in case someone happens to crank the volume to 9001 when I’m not looking. A limiter combined with a rugged pro driver and a high-pass filter would take care of this, but a compromise must be made because of the…
• Budget: I have all supplies except for a driver, connectors, and possibly another amp. No more than $50 for a driver, maybe a few more if I need connectors.
Examples of use: Friends want to hang out to watch a movie or listen to music inside their house. Subwoofer can be attached to source, e.g. iPod dock, computer, TV; Friends want to hang out outside or in another mobile situation. One friend has a stereo backpack sourced by iPod. Use y-splitter and bring subwoofer with battery amp, extend response to 32hz; At home or apt: use to supplement systems there.
• MDF enclosure with handle
• Amplifier: Unused non-portable amp at home, 150w available (75w over two voice coils if it’s DVC; if SVC, 80w), also a portable 2000w amp available (lol); lacking portable amp. Looking possibly at the Dayton AC/DC T-Amp for mobile use. Maybe a plate amp would work too, but I’d have to put it in later on.
• Driver: Looking at that 6.5” Tang Band driver in .7cuft tuned to 35hz, it seems to fit the criteria, 100dB at rated power (95dB if driven by portable T-Amp), but it’s port limited past 60w, 13inx2.5in port? I could increase the box volume a bit more, but at that point, I might as well look at a larger driver. Maybe there’s a pro driver in the price range. The Dayton PA255-8 models well (+2dB same power, +15dB full power) and would cover the rugged aspect, but then I’d lose portability at 3cuft. Any tips or suggestions…
If I go passive, then I can use more power in stationary use, but active would make the protection and portability better, except no mobile use without batteries.
Currently I’m leaning towards the passive TB. I have full processing capability in my laptop soundcard and that’d be the source most often. I could make a second sub for stereo use if this turns out well. Also, bnash mentioned something called the F20.