I designed mine in a similar fashion, as it works well in a cabinet this small.Full range, multi-way, front loaded horns, rear loaded horns, transmission lines, open baffles, isobaric, you name it.I dont believe in fancy cables or mystical noise filters, just sound engineering along with repeated listening and measurements.The purpose of this instructable is to demonstrate a different way to build subwoofers, which has become my absolute favorite method for low frequency reproduction: the tapped horn.
This allows for many possibilities, including greater efficiency, smaller enclosure size, and deeper extension. Because of the acoustic load placed on the driver, excursion is reduced, leading to increased maximum SPL and lower distortion. My goal of this instructable was to build a versatile, affordable, small, and high performance tapped horn that someone with reasonable woodworking skills could assemble. Dont just think of this as another common sealed or bandpass subwoofer tutorial, this is a much different realm, and is also significantly harder to build. It utilizes two 8 inch MCM 55-2421 drivers, which cost 28 each, and perform at a level of drivers costing magnitudes more. Add a sheet of plywood and few bits of hardware, and you have an excellent tapped horn subwoofer for 120. How much would a tapped horn cost commercially Well, the most affordable tapped horn sub I know of is the TH-Mini, which runs about 1300 per piece. For less than 110th the price, you can see what all the fuss is about. Now, without further delay, lets make some sawdust What would I do with a Shopbot Tom Danley had hinted at offering a kit for a multiway tapped horn speaker, but because of limitations with time and a focus on the professional market, it is something that will not happen. Horn Loaded Subwoofer Plans License The TechnologyHowever, he was very supportive of the idea, and offered to license the technology to a third party if they wanted to tackle it. If I were to get a Shopbot, I would pursue a licensing agreement with Danley Sound Labs to provide these kits at a very low price. It would be my way of giving back to the community for a Shopbot that I didnt have to pay for. A Shopbot can precisely cut the complex angles and provide the precise alignment that is necessary for such an undertaking, not to mention do it at a rate that would allow production costs to be kept very low. Horn Loaded Subwoofer Plans Download Step 1Add Tip Ask Question Comment Download Step 1: Designing the Horn I designed this tapped horn using three different programs: Hornresp (horn response), AkAbak, and Sketchup. All are free, but all have a learning curve, some of which are steeper than others. I wont go into how to use these programs, as there are tutorials online if you are interested. If you havent worked with speakers in the past, you will have to spend some time educating yourself on the various parameters and meanings. If you need any help, or want guidance on where to find info on using HornResp or AkAbak, feel free to ask questions in the comments section The arrangement of the driver is roughly similar to the TH-Mini, which has the driver on the bottom of the cabinet firing down into the throat.
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