![]() I've measured, built the XO, and measured again, and the only deviations in response were due to subtle shifts in microphone and speaker placement. Mathematically, their job is extremely simple. When it comes to the actual crossover, the simulation tools model real-world results astonishingly well. So many of the various acoustic phenomena that we have to account for in simulation tools (like baffle diffraction effects and acoustic offsets) will all be inherently included in your data. Build the boxes, test fit the drivers, and measure each one individually. But if you have the ability to measure, the time to do it is before crossover design. There are some very good tools that will help you transform the manufacturer data into something you can work with in a simulator ( I did a write-up on using those tools). But they're accurate depictions of the driver's response on an IEC infinite baffle-NOT in a room, not installed into a box. Yes, manufacturers give specifications sheets, and depending upon the company, they're accurate. The goal behind crossover design is to shape the response of the drivers to work as a cohesive unit. IMHO, that's the wrong time to do the measurements. BoxSim has a steeper learning curve (and finding tutorials is harder since all the official documentation is in German) but is all-in-one and is quite powerful (and looks much slicker than most of the other free software).Īfter building them I would like to measure the output. I currently use WinPCD + UniBox, and quite like it, but am working towards using BoxSim. Passive Crossover Designer / WinPCD (essentially the same thing) + Unibox If you're interested in Horns, HornResp and Akabak are good for those.ĮDIT: I realized after I posted that I listed a lot of stuff here, and honestly, function-wise, there's a lot of redundancy. It's my least favorite box modeler, but I actually really like their ISD Online java applet as a quick and easy way to estimate enclosure requirements for a driver it's excellent when browsing for drivers online. The website is in German, but the program is available in English. Here's Charlie Laub's site that has some more free software/spreadsheets available, including the excellent Unibox.īoxSim is another box modeling software, one of the better ones. ![]() It has basically all the same functionality, but I personally prefer it to Jeff's Excel sheet. WinPCD is a standalone piece of software based on Jeff's Passive Crossover Designer. Baffle Diffraction and Boundary Simulator and Woofer Box and Circuit Designer are not bad, but I prefer other software instead. The standout piece here is Passive Crossover Designer, a really good crossover designer. Jeff Bagby has some excellent free software available, they're all Excel spreadsheets on steroids. I have yet to try any paid software for speaker design, so all my recommendations will be for free software, which may be good for someone just starting in diy speakers.
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