Recent content by FSAF

1. It is a complete mystery for me, too. 2. Some do sometimes. SB12PAC ($23) is identical SB12CAC ($80) except for the cone material and the large aluminium ring inside SB12CAC. Move that ring into SB12PAC (it fits perfectly), and the lower distortions move with it. 3. Wrong beliefs that became...

1. Adding a linear damper to the spider. Practically all spiders resonate on 150...500Hz frequencies, the internal damping is non-linear - looks like dry friction. If you add flexible glue and foam, the resonance will disappear. 2. Adding a linear damper to the cone. Cones often exhibit...

I made a few arrays, 4 way, specifically for my room to deal with floor/ceiling reflections. I implemented crossover in a PC, via Equalizer APO, with TPA3255 per way. IMHO, you need to know the math of near-field beamforming to make something worthy of the effort, which is not exactly trivial.

What level of explanation do you need? PhD or 5 years old? The "original" does not refer to master tapes or acoustic fields in the recording studio. It refers to the digital recordings available to the end-user. It is not a problem to equalize your acoustic system to a picture-perfect...

The only reason for the existence of simplified tests like sine sweep and multi-tone IMD tests is their low computational load. Their interpretation in terms of music is ... debatable. Many self-proclaimed experts claim that by looking at FR, harmonics, and spinograms, they can predict how a...

I'd suggest generating colored noise instead, with a spectrum similar to that of the music you like.

Oh my...here are rear wall speakers in my bedroom, the port at 4.5':

You may consider placing your subwoofer(s) at 1/2 of the ceiling height, i.e., 4.5 feet. Otherwise, you will have a dip at ~60Hz. Compare a sub at 0.3m: and the same sub at 1.35m:

I suggested using a PC instead of these ultra-expensive high-end AV boxes, so I bought a Creative Audigy FX V2 card to verify my suggestion. First, their app (specifically, CTFXAS64.dll in Windows/System32/) crashed MATLAB Audio Toolbox, which uses PortAudio as ASIO IF. I uninstalled the app...

It may be useful to consider that mathematically, all that Dirac is doing can be fit into 20 lines of MATLAB code. Kernel-based regularised RIR inversion is all there is. If companies like Harman have not done it already, that means they simply don't have sufficiently capable people, which means...

https://www.sweetwater.com/store/detail/UMC1820--behringer-u-phoria-umc1820-usb-audio-interface But - stability of interface and drivers is a huge headache. Recently, I got Creative FX V2 to run crossover into 3-way and found that its app crashes MATLAB. Good grief... I was told by pros that...

That is a good point. On the other hand, you get incompatibility between scientists and engineers, their total inability to work together, and the resulting rotating door employment practices precluding any support, "...and the weak will suffer" where the weak is a customer. That's besides the...

Arcams, etc have a DSP inside to execute long FIR filters. x86 with AVX/2/512 etc is also a capable FIR executioner. You can, of course, have 8/16 channels audio interfaces like Focusrite 18i20 (or 3x cheaper alternatives) to take in many channels with ASIO, filter/combine them, and output the...

Sorry, I thought that it was a well-known idiom. My wrong. https://en.wikipedia.org/wiki/Bob%27s_your_uncle

Could anyone explain why you would bother with these receivers if you could get a mini-PC for $200, add a 7.1 USB soundcard, and Bob is your uncle?