Originally Posted by mthomas47
I think that @Soulburner
should be commended for developing an output per dollar matrix for Rythmik subwoofers. I honestly think the matrix can be useful to some prospective buyers. But, I also think that the proposition of an output per dollar matrix tends to break down when we exceed a certain base level of performance.
I think that as long as people are comparing only a particular frequency (such as 20Hz) or a limited frequency range, the comparison works. But, we have to pay more for the lowest frequencies, and if that is important to someone, then the fact that there is another subwoofer, which has a better output per dollar ratio at 20Hz
, may be completely irrelevant to the buyer.
Whether we are talking about subwoofers, or automobiles, or something similar, there will be a base level of performance where good economy comparisons can be made. And, then there will be a point at which we are paying a relatively higher premium for additional performance over-and-above that base level. And, economy will not be the most important consideration at that point. It will be performance. In this case, it will be extreme performance at frequencies well below 20Hz
. Unfortunately, more output at very low-frequencies simply costs more.
Completely agree, and well said, Mike. These numbers are really just an extension of Rythmik's own relative performance levels (validated by data-bass testing where possible) and it should be noted that there are other considerations when making a purchase.
The data points can be useful for some, especially when considering similar models, and especially when we have the option to buy multiple. Many people ask "should I get 1 of Model X, or 2 of Model Y?" Consider the following scenario: the FVX15 has a better PPD than the FV15HP. So, it may seem that buying a bunch of those is the way to go. It turns out that if you build out to 2 subs, 3 subs, 4...what you'll find is that it depends.
2*FV15HP = 112.6dB at 20Hz, $2616
3*FVX15 = 113.1dB at 20Hz, $2997 <-- $381 more for 0.5dB, and only if you have room for a 3rd. But if you do, and you spread them out, you'll get smoother bass response than with 2.
Let's see how it continues to scale.
3*FV15HP = 115.6dB at 20Hz, $3924
4*FVX15 = 116.1dB at 20Hz, $3996 <-- $72 more for 0.5dB, but only if you have room for a 4th sub. Same room response benefits as above, but going from 3 to 4 subs is a smaller improvement. We're getting to the point where some may opt for 3*FV15HP due to space constraints.
You can see that in these scenarios, it isn't quite cut and dried. So Rythmik has done a good job at developing their prices.