Let's move on in our techincal issues via small competition. Here we have 3 subs, all are 2x18" boxes. 2 well known and 1 less known box. Can you say which subs these are and which is the best one? None of these is hornloaded in anyway.
Winner gets lots of admiration and honor!
You have time until friday evening.
(Impulse response shows how accurate replication of excitation signal comes out from sub. Optimally it is just one sharp peak upwards. This peak also tells us directly, wheter our speakers are in same polarity. If peak is always up, we have it right, if it is down in some cases, we need to do polarity reverse. This is helpfull tool in time & phase aligning but you need to know how to use it and what to do with it. This story will come next after this competition)
Although its a nice idea for now there is not enough information for anyone to draw a correct answer.
1. The test inpulse should be shown for comparison. It could have looked like any of the 3.
2. Were all speakers in the exact same spot?
3. At what freq. was pulse at? One sub may look great at 15hz while the other 2 may not. Doesn't make the other 2 not as good. It just means one sub may be better at a certain freq.
4. At what power voltage was this pulse at? Same as 3 above.
The impulse response can also show time offset between a reference microphone and the speaker in test. This is used to put the reference side and microphone side in alignment. In smaart as an example.
When comparing anything for that matter you need the full picture. Its just not here to make a correct answer. One sub could have been measured in a room and the other in a field? Who knows?
Kind of like me asking. "How long is this string I'm holding?"