Originally Posted by LTD02
given what we have learned, I'd make some changes to the Submaximus if using the uxl driver. it would probably amount to a redesign.
also, haven't checked given the new learning, but does the uxl work in the gjallerhorn after inductance adjustment?
Originally Posted by Fattykidd
Is there something that needs to be done after the build to account for the inductance?
So you no longer recommend Submaximus? Is the inductance issue audible ? I'm planning to build two and will probably pick up two more uxl's later on to put in my ported enclosures. But will still be running my two ftw21lte's in the meantime..
Light line is a regular sim with UXL in Ghorn. Dark line is inductance corrected sim with UXL in Ghorn.
This is the 4th time I've posted this sim in the last couple of weeks in various places.
Ricci confirmed this is going to be at least somewhat accurate, although his own estimate wasn't quite as bad as mine. He felt the UXL was an acceptable drop in driver because the main response (up until the first big spike) was still within a 6 db window. Not as good as the original driver the cab was designed for but workable with processing. This is all in the Hzhorn thread.
This is my basic inductance correction method, not 100 percent accurate but a lot more accurate than the light line without the correction. If you want to see how accurate my basic correction tweak is, skim the Hzhorn thread, there's a bunch of examples including inductance corrected sims for Submaximus (with UXL) and Othorn (with UXL and Sundown ZV3) with actual measurements shown for comparison. Can't compare Ghorn sim as shown above to a measurement because no one has measured Ghorn with UXL yet, but it will look very similar to the dark line in the graph above when someone ends up posting a good measurement one day.
I didn't want to bring this up myself, but since you guys did, this is the prediction. I don't want to follow Ghorn threads and post this every time, I don't want to pick on Ghorn, but personally I wouldn't put a UXL in it.
Submaximus is a different story, flhs are a bit more forgiving for high inductance drivers, I think Submaximus measurements look fine and although it's tuned a bit lower than OP is looking for I think it's probably a better bet if UXL is the chosen driver. A complete redesign could be fine too though, if someone is willing to do it.
There is nothing you can do AFTER the build to account for inductance, it has to be accounted for in the design phase.
Inductance isn't audible as a distinct phenomenon per se, it presents as a completely different frequency response that a sim would suggest because simple sims can't accurately handle high inductance. This different frequency response WILL sound different, but it's not a specific sound you will hear that you can point at and say - Inductance. It's just a wildly different frequency response than you were expecting if you didn't correct for it in the sim. It will show up as a severely overdamped high q in cab response, suggesting that the box is way too small.