Most will tell you 1/12 is more than enough. You are going to have hard time telling even JA, that normal human need such high resolution. Parasound A21 vs QSC RMX850a, can you tell which one is the C$300 RMX 850a? And it was 1/48 smoothing. But then, as I did say, you'll be the judge, and of course the saying ymmv applies too. Those who disagree will always disagree, but those who are curious and are open minded, could be convinced one way or another if they see some evidence that makes sense to them. My point is, such an experiment will show different amps (I mean good amps like mine) do not change the FR of the same speaker. In other words, whether you swap out the amp or not, consecutive sweeps will never be identical, unless 1/12 (well, may be 1/24) smoothing is applied, but even with no smoothing, they do look very very close. In any case, the differences between the two sweeps for two different amps will look the same as repeating two or more sweeps using the same amp, margin of error, repeatability etc., is one of many reasons. At 1/12 smoothing, you cannot really tell which is which. That's why SBT/DBT would naturally be more convincing.Ĭlick to expand.Your are right, I have never seen them identical, unless you apply 1/12 smoothing. I would go further, to say that even if everything is done "properly" to do such AB compare, expectation bias will likely still play a strong role.
RichB done it and he did find some difference between his ATI class D vs AB amps iirc but I can't remember the reason(s) for that.
I have done such experiments using my different speakers, avrs, prepros, preamps, and amps so I know the do bad you are not as crazy as I am, but I do wish you would do some of such experiment because like me, you are at least crazy enough to have owned, and I assume still own quite a few avr, prepro, amps etc., so you are well equipped to do it. What would that tell you? You'll be the judge. Now move the mic 6 inches in any direction, sweep again and you will see a very different picture. I guarantee you will see the two FR graph look very much the same, like overlapping on top of one another if you apply even just 1/48 smoothing so your eyes can see better. If you end up using REW, plot a FR graph from you mlp, one speaker at a time with no EQ, no DSP, then leave everything exactly the same including the mic position, but simply switch to a different AVR, amp or preamp but make sure you volume match first before doing another sweep. That's why SBT/DBT would naturally be more convincing. If you're completely unable to address the room itself, then just know that room correction, even Dirac will have its limits.Ĭlick to expand.I would go further, to say that even if everything is done "properly" to do such AB compare, expectation bias will likely still play a strong role. I totally get where you're coming from, BUT do be aware that while room correction can help a LOT, often times it can only get you so far. Either way, GO FOR IT! See what happens! I'm all for experimenting. I just don't want you getting false hopes in case you're not happy with Dirac either. I know you understand this already so sorry if I'm preaching to the choir. Digitally "treating" a room gets you those last few increments of improvement IMO. We've all seen substantial improvements made by the physical aspects of the room. Always amazing the improvements that can be achieved with simple things like moving the couch a hair, adding a rug, curtains, toeing in/out speakers, moving a sub a bit, etc. You could also end up not quite happy, though.
It's totally worth a shot to see what you can pull off with processing.
If you're completely unable to address the room itself, then just know that room correction, even Dirac will have its limits.ĭon't get me wrong. Click to expand.I totally get where you're coming from, BUT do be aware that while room correction can help a LOT, often times it can only get you so far.
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