School is winding down allowing time to work on ideas for all the drivers accumulated thru the past few years.
Yea, I know, most of you guys here are versed enough in crossover topology not to need a layman's guide 101, but I do.
In particular:
- When to use rcl in series both before and after
- When to use them in parallel legs
- They're variations of both rcl networks, what are they used for?
- How to attenuate in band anomalies
- How to attenuate out of band anomalies so the handoff is smoother.
- How to widen or narrow the attenuation band
Been playing around with xsim and pcd for some time and if the drivers are easy to work with things are fine, but a hiccup here or there and I'm in trouble. Found a few answers by experimenting, but more often than not the sheer number of possible combinations do more to confuse than enlighten.
First things first. I have a knee in both a woofer (~3.5k) and tweeter (1.8k) slope that lies ~8-12db below reference that I would like to clean-up. Where do I start?
I know you guys have your own slang for what is what so you may have to explain it a couple times ... or write really slow.
There are many more combinations than this (pcd), but for easy reference:
Comments
I want to add that correcting every blip is a waste of time imo. Start simple and check off axis. If you are using omni mic or other real time FR measurement, pick up the mic and move it around, you will see the issues pretty quickly. I learned that the hard way rushing through a few designs...
Various experts have dropped hints and tips over the years, but those have never been gathered and written up. For instance, someone said (I could very well have this backward)- use a parallel RLC for in band anomalies, and a series RLC for out of band anomalies.
Nice response in the sim, but I'm not sure whether you need the RLC traps on both drivers.
I always strive for simple, minimal component crossovers.
IME, you can sim a whole lot, but once you put the drivers on a baffle, the baffle diffraction will swamp
the ripples you are trying to smooth now in your sim.
Some guys do a lot of sims. I do measurements in box, then import those into Xsim.
More than once, I've gone "down the rabbit hole" in simming and tuning a crossover, thrown out all the
sims and variations, and started from scratch.
Hope this helps.