chaudio wrote: I would say Sub 3 is the D&B B2 as it's a narrow tuned bandpass
No horn loading rules out the FK1/Turbo 2x18 BP4 Horns.
So Sub 2 is probably some kind of reflex. Is the inverted polarity a red herring or a big clue?
Actually B2 is sub number 2 with D12 and "normal" mode.
Tony: Of course you can't judge speaker based on pretty colors and lines, but they give you some information about what to expect. If impulse response shows considerable ringing, you can't excpet for example the sub to be really tight and accurate. Point of this thread is not to slag any of these cabinets or promote any of them, it is just (at least in my opinion) funnier way to see how different results can be found from different boxes. Real purpose will be revealed later when i continue about impulse response itself as a tool.
One have to remember though, that since there is some processing involved (LPF at least, don't know what D12 does above that) it also shows small mark in impulse response. For example that small dip or peak on left side just before bigger peak or dip is caused by this, filter overshoot. Not Low Pass Filter applied, no small dip/peak.