|I'd have to disagree unless you low pass your sub around 40hz. Is the NS18's .68mh better than the LMS 5400's 2.80 in a significant way? I don't know. There is some point where inductance becomes an issue. Beyond that, how inductance changes as a voltage is applied can cause distortion.
How can you disagree when you do not know about the audibility? I do know about it. You have to have audible proof until then its someone's silly little theory. Distortion levels in bass systems is a big red herring to start with. The room causes more noise then most designs that adds to the masking effects. You also miss an important part of the point "compared to other design parameters".
My conclusions, Not an audible one at all. There is no difference and distortion rates this low are always masked. Every controlled listening test proves this and I have enough different subwoofers to understand that as long as they are all played within their limits there is ZERO audible distortion.
Its all about knowing what your displacement and headroom goals are.
Example. There is ZERO audible difference between 4 Q18s and 1 LMS5400 when played in the performance range of the Q18s (you have to figure out that range), The Q18s beat the LMS5400 with clean output too. I also have the AV15X drivers and the TD series drivers both with ultra low inductance....bass performance does not care one bit about all this splitting hairs debates when we understand the performance range of each design. What seperates the LMS5400 is what it does in a smaller box that is all. There is nothing special about the NS-18 other then it has decent displacement and it also has the ability to play well in a smallish box. If someone has a place for monster boxes then 4 Q18s is a better choice over all.
Lets face it, no one is going to be able to even tell the differences here, they will just know they all sound amazing compared to what others buy (ie. crap little subs). Once you get into multiples all those little numbers and nitpicking goes away because once displacement is past X liters, everything else works with ease. Put 4 NORMAL PEOPLE in a room and run the test.....its so damn easy to know there isnt much difference but the splitting hairs debates online sometimes makes mountains out of mole hills, its all noise, its like a stocktrader watching CNBC or political hacks watching FOX or MSNBC, its all noise!! Sometimes all the subjective nitpicking has to be turned off and realize that EITHER quality choice is 1000 times better then something BIC or Polk offers.
I welcome everyone to start buying more and start testing more and all these back and forth discussions would end faster
|I don't think it is any coincidence that Aurasound, AE AV series, JBL 2242/2245, etc all have motors designed for very low inductance. It does become a factor from the 50-120hz range, IMO the most important range for a subwoofer's subjective sound quality. This is the range that separates the men from the boys. It would be much cheaper and easier to build a motor with no regard for inductance.
hehe, Caught this....You do know why I own TD series and AV series drivers right?? Im not debating the significance of inductance above 80Hz at all, obviously its important and I have posted many times of what specs I think matter in those drivers (Le being a very important one) but anything in the lower frequencies is completely meaningless. Look at the distortion charts and compare. Remember measurements is our friend there isnt any mysterious/golden ears soundwave that can not be measured
There are many ways to design a systems, to me its all about headroom. Increase the headroom to remove the nitpicking BS that goes on about this driver vs that driver. If Im driving any 18" woofer at 10% Im not getting distortion. It does not matter if its $200 or $900.