The difference in max SPL isn't that big, as you can see. Ultra is a bit stronger at the lower end especially when tuned to 16 Hz. But the big difference is in THD levels. Even the newer dB12.2 will beat the older dB12.1 easily, not to mention the Ultra. GD, spectral decay are very much alike, so from there you can't find an audiable difference.Ian J said:There is really a lot to digest in one sitting so I have come back a few times to re-read the test results.
I very much doubt whether many people will have the necessary technical expertise to interprete the results correctly and I make no claims to be technically minded but I am wondering just how much benefit I would get by upgrading my PC 20-39 PC Plus to the PB-12 Ultra as according to my reading of the stats it isn't that much better.
I was measuring/tuning a DIY Tumult/BFD combo for my friend last night, so unfortunately the comments for each sub are still unwritten, but I'll promise to post them tonight.
Yes want an simple answer? Yes. But the newer dB12.2 or the Ultra wouldn't hurt you either.My cylinder is still in stock tune and I am wondering whether my most cost effective upgrade might be to search out the port bung and re-tune it to 16Hz