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Here is an option for the mid-bass unit that makes this an even more sensitive dipole than the initial proposal. And that is to use a Lambda Acoustics TD15M woofer. Here is the modeled response of this driver in infinite baffle, with 55W input power: With the higher rolloff frequency, the subwoofers will definitely be required for this version. However, with a nominal sensitivity of 97 dB/W/m, we gain a lot of transient capability in the 100 to 600 Hz region (or wherever the crossover ends up being). The gradual rolloff is because of the driver’s relatively low Qts – it’s not ideal for dipoleRead More →

Box dimension calculator
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Here’s a little spreadsheet that helps to figure out the dimensions of a speaker box. What you do is enter a bunch of dimensions, and it tells you the actual internal volume. I’m sure someone must have done this before but I couldn’t find one. Here’s the file: Box dimension calculator Here’s a screenshot: Here’s how to use it. In the Enclosure section, enter the best-guess dimensions, and the thickness of the wall material. In the Round Port section, enter the diameter and length of the port as calculated by your box design program. If it’s a sealed box, enter 0 for the length. If youRead More →