Yeah your right, his graphs don't quite look right to me either (something is funky with them). I think the app may not be working right with his particular Iphone XS. That has been the case before with some phones, I have heard of this before and remember seeing it somewhere in the VS thread as well a while back.
If you look a Enrico's graphs compared to ours, they don't look right, and not because its on concrete instead of suspended floor like ours. (I've done readings on concrete before that look like ours do on suspended floor). It's the way his phone and app is capturing the reading (something is not right). The readings are really sloped down from left to right, and real high under 10hz (on the far left) and climbing even higher at 1 to 0hz (like noise, there shouldn't be anything here below 10hz in the EOT intro) as well as reading low on the right hand side toward 50hz. Also with that FV25 not too far behind his seat (1 to 2' behind right?) he should be getting some pretty strong TR at 20hz and 15hz too (even being on concrete), not just 30hz and 25hz on the EOT intro (in his first readings he posted). Also there is no smaller TR spike at 45hz (and 40hz as well that should be a little smaller than 45hz) either like there should be and I know for sure he should be getting those as well (or at least the 45hz spike) like we are and in the actual PVA graph that we are trying to match our TR with. (I'll post the EOT intro PVA down below for reference). The lines are pretty squiggly too in his first readings, but that is just because he took a little longer reading than 20 second on these, I think it showed 38 seconds or something, but that's fine, he shorted it to the right time in the next EOT reading.
His latest reading doesn't look right either, yeah its showing high TR all the way down to 1hz, but doesn't look right. It should read as 5, well 6-7 actually, distinct spikes on the VS graph, starting right to left as 45hz, 40hz (these first two are smaller ones), then the big hits wiht 30hz, 25hz, 20hz, 15hz and lastly 10hz (which is a very hard one to get a high reading on unless your subs is tuned to 10hz or sealed and the driver VERY close behind the seat back (probably at least like a foot or less a way) or on a suspended floor. Go look at Chucky's EOT VS reading, that JTR4000 is a Beast of a sub tuned at 10hz with the LFA control at max to lift the lower end hitting 120db down at 15hz and 10hz. But his 10hz TR reading is about 20db lower than 30hz and 15hz is about 12db lower. They should be higher than 30hz or at least about equal too or more closely match the actual climbing PVA of EOT intro if that makes sense. You can see his graph HERE
- please don't take this the wrong way (I'm not trying to pick on you but yours is a good example), your TR is still very strong down to 10hz (and strong as hell at 25hz and 30hz for being on concrete and one FF sub) and that sub is an absolute Beast that me or anyone would probably love to have. I'm sure 10hz and 15hz was wrecking havoc on your house as well, but still lacked the TR at the MLP seat compared to where it should be at in relation to the 20, 25 and 30hz tones. The point I'm trying to make here is that, even with the most bad ass low tuned subwoofers, its very hard to get the 15hz and especially the 10hz TR up to the levels they should be at in relation to the higher bass frequencies up to 30hz (to accurately follow the PVA graph in relations to all frequencies in the track) with Far Field only and on concrete. Even NF low tuned subs or sealed can struggle with this when pretty close on concrete, where VNF will win out most every time when it comes to moving the seating on the ultra low stuff at 15hz and below. 25hz and 30hz are the easiest TR to obtain, with 15hz and below being the hardest. Sometimes, or most times I would think on concrete, the only way to get these ULF frequencies in TR raised up to where they need to be in relation to the others is to have a sub super close behind the seating and or some Crowson MA's.
I'm not saying Enrico's subs aren't producing some very nice strong TR down at 15 and 10hz on the EOT intro, they very well may, but I don't think his readings are right for some reason with on his particular phone (Iphone XS).
- you may try restarting your phone and running the EOT VS again to see if the readings look more normal. This happened to me with my Iphone 7 before and a restart of the phone fixed it to make the readings look normal. Also if that doesn't help, you may see if you can run the EOT intro with
's phone if he is ever over at your place. This will make sure you are getting a good reading if you really want to know what you TR looks like and be accurate. Even with the readings you got, even though I don't think they are right and look funky to me, the 30hz and 25hz look to be about where they should be, nice and strong. But below that, at least to 20hz and 15hz (and 10hz spike as well but that one may still be tough since the FV25 is only tuned to 12hz, leaving the sealed subs to do most of it and room gain), as well as the one at 45hz, should read pretty strong too with the subs you run, especially with the FV25 being fairly close behind your seat, but they don't (at least in nice strong spikes like they should for the 10hz tone, its too funky looking and wide spread for this tone to be right and accurate). Also, make sure your phone is facing forward in your seat (if your not already doing this) so that the axis's will read right as well.
Nice FR too BTW Enrico!!
Here is what we are shooting for with our VS graphs. We want it to look as close as possible to this actual PVA graph of EOT intro (the closer the better for your system to track and produce the TR accurately as possible on all these movies tracks). Here's the PVA to EOT intro ...
My subs only don't track quite as well as they should to the PVA at 15hz (my 15hz is too low in this graph compared to the rest because of something weird with the interaction of the seat and suspended floor, IDK for sure) , but still pretty decent overall for the most part at -10mv (you can see the subs only HERE
in my new room, its subs only) but pretty much do with the MA's in the mix with the subs and with a fair amount more intensity (although I didn't show that reading with all combined in the new room). But I'll show one HERE
on my last system on concrete when I had my setup downstairs with VNF subs, MAs and BK's all running together. It follows the PVA just about spot on which is what we are aiming for and the what the VS reading should look like. Sometimes we just need MA's in the mix to get those lower frequency TR levels up to par. Granted these are super high intensity TR readings at only -10mv here in this old graph (the TR was mean as hell in my setup down stairs), but we still want those readings to look like this if we can, at whatever intensity levels we can get. That way when we watch movies like the 'Incredible Hulk' or War of the Worlds', or most of the BEQ'd movies that are over 500 in count now
, we can feel the TR down low in the ULF frequencies at the correct levels (in relations to the others above ULF) to go along with that nice extended range FR (weight, pressure and fullness as well) like Enrico, Imureh and Chucky have going on.
Phew ...sorry for such a long post guys! Hope all that made sense. Great job on capturing the VS readings Enrico! Lets try it again though if you want with your phone restarted when you get a chance to see if they look more normal, if not then maybe with Imureh's phone that we know works right.