DIY Audio Parts India 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. The results should be quite satisfying and surprising to those who choose to build it. 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 impedance of the speaker is now cut in half. This means that you may need a more robust amplifier to drive it.
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DIY Audio Parts India 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. The results should be quite satisfying and surprising to those who choose to build it. 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 impedance of the speaker is now cut in half. This means that you may need a more robust amplifier to drive it. Will your amp run these? Also, most chip amps and digital amps will have no problem running this speaker All the user would need to do is plug in his source iPod, computer, etc.
The trade-off is thus: if you use thinner stock, you get a smaller, lighter box, but you will need to do at least two internal braces; if you use thicker stock, the cabinet will be less resonant and may not require any bracing at all, but the box will be slightly larger and heavier.
You can get creative with the box if you put your mind to it. I could easily envision these being made into tall and slender "sticks" like those sold with HTiB sets at the big box stores. Turning the design into a tower would mean simply having a hollow compartment in the bottom, which you could fill with ballast if desired.
The cabinet width is still 6" an the tweeters are still offset--although this time it was done mostly to allow the woofers to be as close together as possible. The drivers are still surface-mounted, but feel free to flush mount them if you like. I kept the cabinet depth pretty shallow so that the speaker would have a small footprint. This created a quirky scenario with the vent tube, though: that is, a single 2" or 3" diameter vent tube would be too long to fit horizontally inside the cabinet, so I used a "dualie" configuration: two 6" lengths of 1.
If you like the look of vents on the front, you could mount them there instead. Simply glue the sliding portion so that the total vent length is 6". These are easy to mount and give a clean, professional look. I should also add that this vent from Parts Express has been used by some builders. Due to its reduced diameter, the stock length of 4" is actually right on-target, so no cutting is required.
However, there are several very nice builds of the Overnight Sensations out there that use this port, so it must be OK. The enclosure could be lined with convoluted foam, which is pretty standard for a vented design such as this. In my case, to keep things simple, I did not line the enclosure at all.
Instead, I used a few light handfuls of polyfil behind the woofers the internal braces sort of held it in place. As I told many people who built the original Overnight Sensations, getting the right amount of stuffing takes a bit of experimentation.
I find the best results when I over-stuff a bit, then gradually take some out, listening each time. I know when I get the right sound; the speaker suddenly just sounds "huge. The woofer circuit is 2nd order electrical, with the.
The crossover point is around Hz, and the acoustic slopes are My goal was to fit everything onto a 3x6 inch piece of pegboard, which makes mounting the whole thing on the back of the enclosure more feasible. Here are the Frequency Response and Impedance graphs. I do this for some of my designs to give people a better idea of what the true bass response would be.
These are fairly small speakers, and to most ears they will put out a sound that defies their size. This is one speaker that will keep you wondering, "Is the sub still on? Part of the magic of the Overnight Sensations series is in the drivers. The HiVi B4N can put out deceivingly-good bass in a very small enclosure, and the price is very reasonable. 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 ND20 plays very clean.
Small changes in filter values cause large changes in Frequency Response; shaping its response takes time and patience. The end result is worth the work, though. I have nothing but love and respect for Wayne Jaeschke and his designs. The sound is big, and they sort of pick up where the TM version leaves off. Where the TM version does its best work in a small room, the MTM version can easily rock the walls in such a room They still work as desktop speakers, and will have a nice, immersive soundstage, but please be careful with your hearing--and be respectful of those whose desk is near yours.
These things pack a bit of a party. You may remember his phenomenal version of the Overnight Sensation TM with the curved cabinets. He did curved cabinets using thin plywood bent over an MDF frame, then veneered with some beautiful Sapele veneer to match his homemade gainclone amp under the desk lamp. His complete build thread is here.
Conclusion and listening impressions here. Next is a build from England. He finished the speakers in White Oak veneer. To complete the set, he added a Swope sub. Looks like it blends very well into the decor! His build log is here.
HiVi 惠威 B4N低中音扬声器