Honestly, what I would like to see instead of a prebuilt crossover is a gallery of good looking hand-made crossovers.
The things I would like to have seen examples of:
- External connections to crossover (barrier strips, direct to wire)
- Proximity of components (coil to coil)
- How multiple component connections are handled (are the leads twisted then soldered, solder fillet quality)
- What kind of jumper wires are used when components are too far away
If there was a gallery of crossovers, like a show off gallery, it would give people who haven't built one something to aim for. I can solder something up, but if I haven't seen a good example of a passive crossover it is hard to know how to make it.
There are some nice pictures of pre assembled crossovers on the DIYsoundgroup page, but they don't show the underside of the board. Seeing the underside would have helped me, I can understand not showing the underside because of intellectual property, but I'm sure that could be deal with easily enough.