Originally Posted by JHAz
This does not appear to be true based on the fact that the newer amps show flat response out to 200 Hz or higher if you use the correct input. I think the low pass on the Rythmik amps was implemented for reasons other than to account for the servo.
I haven't seen third-party data showing that. If there is third-party data showing that, then I'll change my tune.
And it's worth noting that the "base frequency response" Josh Ricci measured at the "120Hz" crossover setting rolled off significantly earlier. Whether you want to attribute that to poor quality control in the amp, or poor basic design is, I suppose, a judgment call.
Originally Posted by kwarny
BTW, the Rythmik DS1200 and DS1501 driver have less inductance than the Aura NS15 in the bass frequencies.
BS. Or, show data to prove it.
What the actual number is doesn't matter. What matters is how it affects the driver's performance. The NS15, like any bass driver suitable for use in a high-fidelity system, has no inductive hump. The Rythmik likewise shows no inductive hump. I suspect the Rythmik driver without the servo nonsense is sufficiently low in inductance for it to be a non-factor between the two drivers.
Originally Posted by KMFDMvsEnya
Correct me if I am wrong here but doesn't DS-21 have a post history of an inexplicable and irrational bias and axe to grind against all things Rythmik?
No, I have an explicable and rational bias against things that are dumb.
But yes, I do think Brian Ding is a flake. He has written on this forum that changing brands of "interconnects" will change the sound of his subs. No sensible or thoughtful person can hold that position. Only, well, a flake can.