watchnerd
Grand Contributor
Well, you're all set.
Go measure something and post it.
I'm going to spend the holidays upgrading my Pi streamer and putting on a new tonearm.
If I get all that done, I'll tackle having fun with measurements.
Well, you're all set.
Go measure something and post it.
Data point:
Alright, here is what tonight's pondering got me:
I DRC'd both the ML and JBL to the same "flat" level, and did an overlay of the Waterfall display in REW.
But the JBL (green) waterfall obscured the overlay of the ML (gold) waterfall.
I had to reduce the level of the JBL SPL by 9dB to get the body of the waterfalls to match up and poke through each other some.
The key point to me is that the ML has about a 9dB "direct sound" advantage over the JBL in the room, rather, narrow vs wide dispersion, since the brands don't mean anything here.
View attachment 4122
Mathematically adjusted relative levels to get the waterfall more aligned:
View attachment 4123
Original "matched" levels:
View attachment 4125
Original Waterfall, matched "direct" levels, JBL (green) overlaid with ML (gold)
View attachment 4126
Compare original using Impulse Response:
View attachment 4127
Interesting that the room-induced suckout at 40-50 Hz seems worse on the ReQuests.
FWIW, I have 2 pairs of MLs at home, a vintage set of Sequel II and a newish pair of Electromotions. Plus I have my 305s.
I have a pair of SL3 in the bedroom, myself.
Data point:
Alright, here is what tonight's pondering got me:
I DRC'd both the ML and JBL to the same "flat" level, and did an overlay of the Waterfall display in REW.
But the JBL (green) waterfall obscured the overlay of the ML (gold) waterfall.
I had to reduce the level of the JBL SPL by 9dB to get the body of the waterfalls to match up and poke through each other some.
The key point to me is that the ML has about a 9dB "direct sound" advantage over the JBL in the room, rather, narrow vs wide dispersion, since the brands don't mean anything here.
View attachment 4122
Mathematically adjusted relative levels to get the waterfall more aligned:
View attachment 4123
Original "matched" levels:
View attachment 4125
Original Waterfall, matched "direct" levels, JBL (green) overlaid with ML (gold)
View attachment 4126
Compare original using Impulse Response:
View attachment 4127
Doesn't the waterfall comparison mainly show that the ML decays much further in the first few milliseconds vs the JBL. So for the bulk of the undecayed sound you need to lower the JBL so it doesn't obscure the remaining decay levels of the ML. I suppose this is a round about way of saying what you are. The direct sound of the more directional MLs has a 9 db advantage over the more dispersive JBL speakers.
I also have the same gear as do many others.
How about doing a tutorial on doing some of these basic measurements you post
Amir did a basic step-up tutorial of REW but the promised followup still await.
http://audiosciencereview.com/forum...om-measurement-tutorial-for-dummies-part-1.4/
I find the REW help files a bit (lot) confusing and hard to follow.
It's also energy storage -- electrostats have much less energy storage than dynamic speakers.
Keith was saying he was bit baffled by the new version of REW I seem to remember so a REW thread would be great.I agree with Ray on this Sal. Start a thread on it. Would be good for people in the future to learn from. I use REW some though not as often as Ray does. Ray and I and others could help you figure it out. I do remember when I first used it the software was a bit baffling. Some ways it works are still less than ideal from a UI standpoint. Also the help files were not of great benefit to me either. A common failing of free or open source software. I learned more just running it and playing with things to see what did what. Also like much open source software other users are the where the real help comes from in the end.
From listening position, first 5 ms in .5 ms slices, 1/3 smoothing, 2ms rise time:
View attachment 4133
View attachment 4134
The room is 18 x 14 x 9
Listening is 10 feet.
Left rear corner is open to kitchen etc.
Softly about 75 or so with 95 or so peaks, and loudly 85 or so with 105 peaks, Z weighted, at the listening position.
My measured extreme was a somewhat calibrated drum solo (first couple of seconds) that peaked at 116.9dBz, it sounded like Terry Boxxio had come to visit but also felt a bit dangerous...
116 dB?!
I don't think I've ever played that loud at home.