CFO (Chief Fun Officer)
- Feb 13, 2016
- Seattle Area
I would say maybe try to do something like in Erin plots do include separate horizontal DI also? If there’s perfect horizontal directivity like kh150 or 80x0 and the overall directivity error comes in vertical DI it could be actually beneficialA note on directivity. What research shows to be bad is dips in the mid-range. Having a step down in tweeter is not something that is researched as no such speaker was tested. I think it could be beneficial in reducing floor and ceiling bounce in hi-fi as well as their target studio use. Those reflections don't have perceptual benefits so not having them there is not going to hurt anything.
No need for indices, just look ar horizontal and vertical reflections with @pierre’s tool:I would say maybe try to do something like in Erin plots do include separate horizontal DI also? If there’s perfect horizontal directivity like kh150 or 80x0 and the overall directivity error comes in vertical DI it could be actually beneficial
This limits directivity to 50 degrees horizontal and 40 degrees vertically on purpose.I would say maybe try to do something like in Erin plots do include separate horizontal DI also? If there’s perfect horizontal directivity like kh150 or 80x0 and the overall directivity error comes in vertical DI it could be actually beneficial
I will have to listen and report back. Have not been feeling well....
Just to add, AES75 doesn't do just thermal compression. It is just one component of output testing. Another component is 'dynamic range' on top of the compression testing.Hi, What's your definition of compression testing? It sounds like thermal, (which is mine also).
M-Noise or whatever the new AES implementation of it is called, appears to do a good job of defining/quantifying thermal compression.
And like you say, compression is a longer term, heat-em-up, type test.
The other, and I think more prevalent form of SPL limitation (for home audio in particular), I think is excursion limiting, especially within tolerable distortion allowances.
I see excursion limiting as coming from, either drivers running out of excursion in their passbands, or amps being unable to provide needed power to reach full driver excursion.
I really wish some form of AES standardized sweep test would arise for excursion, like Meyer's M-Noise did for thermal.
Just to add, AES75 doesn't do just thermal compression. It is just one component of output testing. Another component is 'dynamic range' on top of the compression testing.
It also quantifies short-term compression. That's why we can characterize 'maximum linear output' correctly with AES75 - the output can be limited by:
Of course, there is no psychoacoustic basis on the thresholds, but we are guaranteed a 'max linear output', before audible compression takes place. All who tried to quantify distortion testing on electroacoustic systems came to the same conclusion: distortion is bening, until it isn't. There just isn't enogh force to generate audible high-order distortion components in a speakers linear operating range.
- the usual compression. Long term (eg. 1h) 2dB wide-band compression; 3dB narrow band.
- short term compression. Music Noise has a crest factor of 17.5dB. If there is amp clipping, excursion limitation etc, it will show up on the 'correlation' graph.
Switched from Genelec to Amie about 2.5 years ago. Now have a 7.2.4 rig with 7 Amie, 2 Amie sub, and 4 up4xp.
My sound design and mixes translate better, with fewer mix notes from clients, fewer surprises from QC.
I trust what’s coming out of the Amie, a lot more than I could trust the Genelec.
However, for general at-home listening, they aren’t a colorful speaker or hyped.
You know people are grasping at straws when they are talking about 10% THD behaviour at 105+dB for a 6.5" speaker to try and rationalise why that sort of resonance behaviour and uneven DI is justifiable.
I think the Meyer reputation and "ecosystem" is doing a lot of heavy lifting and this would be rightly savaged by the community otherwise.
Ah, it was you that sent the speakers in to Amir - kudos to you!I'd love to try that track with the Amie's when they come back. That's the difference of the 708P at $4200 MSRP, which I've listed here for $2250 used and the Meyer Amie's at $8160 MSRP, but I got a discount on as demo unit.
That "little bit of headphone sound" isn't bad at all. But imagine having a sound stage that still feels like you are still engulfed by the music but you lose that headphone sound and you start to have the sense that you're there are a concert where the image is in front of you when it's supposed to be in front of you but all of the ambience is still there.
If there was a $50 upgrade, you'd probably pay it. As the price goes up, you're less likely to pay for it.
The way I look at it, it's a lot more expensive to try to remodel my listening room to be bigger, so rationalized that way, the price premium isn't as bad