The Dayton ND20FA-6 is also a special little driver for the paltry price of $8, any other tweeter would sound like hissy, airy, or sibilant trash. They also have quite a bit of power handling I have pushed the MTM version here with program material to 99 dB with no problems. The HiVi B4N can put out deceivingly-good bass in a very small enclosure, and the price is very reasonable. Part of the magic of the Overnight Sensations series is in the drivers.
This is one speaker that will keep you wondering, "Is the sub still on?" Some may argue that there's a bit of "fake bass" going on, because of a slight hump in the 100 Hz region, but that doesn't explain these speakers ability to play sonic booms in songs like Fear Factory's "Shock," or to pump out the rolling, thumping sub-bassline in Massive Attack's "Karmacoma." I'm not even sure how they do it. These are fairly small speakers, and to most ears they will put out a sound that defies their size. This rule is called Hoffman's Iron Law, and this design is as close as I've ever come to breaking it. efficiency if you want more of one factor, you have to compromise with the other two. In the world of sound reproduction, there's a limit on bass extension vs. All the user would need to do is plug in his source (iPod, computer, etc.) and boom, they're putting out tunes at a volume that might actually cause neighbors or family members to bang on the wall to turn it down. this means that the Overnight Sensation MTM might lend itself very well to a compact "plug-and-play" system, where a small amp is incorporated into the speaker itself. Also, most chip amps and digital amps will have no problem running this speaker. If it's rated for 6 Ohms or lower, you're fine.
Will your amp run these? I can't guarantee. This means that you may need a more robust amplifier to drive it.
The impedance of the speaker is now cut in half. Wiring a second woofer in parallel gives us a few advantages: most importantly, the speaker is 6 dB louder (twice as loud), which also means the speaker will go 6 dB louder than its TM counterpart. The results should be quite satisfying and surprising to those who choose to build it. The idea here is to take the heart of the Overnight Sensations (big sound, small box, cheap price), but increase power handling and efficiency by adding a second woofer.
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