Maybe I am not looking at it the right way, but I do not see anything in those measurements that put this sub at a superior performance level to the less expensive alternatives, and definitely not a twice the performance.
It may or may not be better than the Rythmik's, but it's certainly not twice as good. It just doesn't work that way. Let's assume the JL is better. It's likely incrementally better. And it's normal when you're chasing performance with just about anything: audio, race cars, bicycles, racing simulators, planes,... that the improvements are at the margins, and the relationship between improvement and expenditure is non-linear.
Why, because it is more expensive? No need to assume anything, we can measure performance.
In other words, it is a typical overpriced hi-fi items, with little to no performance advantage but costing a lot more than other alternatives with equal or better performance. Understood, but typical does not equal normal in my world, YMMV.
No argument here. Like I said, I bought the Rythmiks
The first DIY sub I made used a servo system very similar to Rythmik's. That was ca. 1980. Velodyne was using an accelerometer-based approach and my tests showed it did not work as well as the voice-coil sensing scheme that I used (as does Rythmik). There are a bunch of other examples, like the old AudioPro subs and Kenwood's SigmaDrive or whatever they called it. The idea of a servo is not new, goes back to steam engines, just his implementation of it. The thread is about Rythmik, so I didn't say that it was explicitly and specifically his version that he invented and not servo in general, figured that was obvious, sorry.
Overbuilt to be eye candy when most people aren’t going to open the box to see it!
thanks for the clarification.
I know it's not measurements, but the manufacturer specifies that the G25HP has a frequency response of 14–90 Hz (–2 dB @ 14 Hz) with LINE IN inputs. If one takes a look at other Rhythmik subwoofers where measurements happen to be provided by the manufacturer, their specifications seem to be quite accurate.
What size room is your L12s in?
14’x16’x10’
How high to you have the gain set? I want 2 in my 3800 cuft living room that opens to a kitchen and hallway. I have a minidsp flex 8 with Dirac that ive beem using for a dac and active crossover for my my main speakers that are bozak Symphonies that go down to 30hz. I haven't even tried to mess with Dirac yet. This is music only any I just want to hear the bass guitar better and listen to no rap or edm. Think I should jump on a used pair of L12 or go for the lv12m (ported) new at 2x the price?
I’m away from home so can’t check the gain settings right now. I run the Subs off of my Flex, so there is both the gain on the sub and also the gain on the flex outputs to consider. Not sure what to say wrt to the L12 vs lv12m. I guess it would depend upon desired output and budget.
Why does anyone in their right mind need what you describe?
