Recent content by fluid

Excersing the suspension of drivers by playing low frequency tones to get the suspension moving for 10 minutes or more is most often enough to actually break a driver in. 10Hz is very good because it is not offensive but you do have to watch the volume and go steady to make sure you don't...

These don't have the parameters to be intened for use as subwoofers. How JBL uses them, up to 700 or 800Hz crossed to a horn is what they were meant for. 15" PA Sub drivers tend to look like this. https://www.bcspeakers.com/en/products/lf-driver/15/4/15DS115 Heavier cone, rising Le, low Qts...

There is no handy xmax figure but there is a lot more useful information about the driver in the datasheet. For Bl 82% of the resting value is 15.5 which is about 6mm of displacement For Kms 75% it looks to be a little more but it is hard to read the values. There is 6.1mm in one direction...

Yes absolutely, as it impossible to consider dropping all the music that already exists, a speaker that uses a directivity that differs sufficiently from industry norms in production is likely to require a bit or a lot of modification for it to sound "right" with the music that already exists...

I think this depends a lot on the level of the DI which does relate to the width of the pattern amongst other things. But can also be personal preference or adaption. I fall very much into the trained listeners camp in the Harman research where I want the in-room to be down at high frequencies...

The shorter the gate time the less sampling points there are to describe the frequency response. At high frequencies there are still enough points per octave to correctly plot the response as measured. As frequency goes down there is less and less resolution to describe the frequency response...

You can do all the scaling, diffraction simulation and merging in Vituix which is designed for the purpose. If you are having trouble with REW you might want to try Vituix. https://kimmosaunisto.net/Software/VituixCAD/VituixCAD_help_20.html#Merger_tool

Your physical measurement setup of the speaker looks OK. Diffraction off the speaker is part of the speakers response and is normally done within 1ms unless it is very big or particularly diffractive. Diffraction off the speaker itself has nothing do do with the measurement problem. The pre...

The whole impulse response looks messy and unsettled, that is not a single reflection from a specific object. Some pictures of the speaker and setup may be worth more than 1000 words of explanation. Putting the speaker at the centre of the room height will give you the longest reflection free...

1.5m from the floor should give you 6.29ms of reflection free time. You also need to consider reflections from the microphone to the stand or clip or other objects near to the microphone. Zoom in the impulse response to see just where the reflections are, then you can work out where they might...

Listen for yourself and make your own mind up but I do not like the sound of phase linearizing the system high pass from the woofers rolloff whether sealed or vented. It sounds "wrong" for want of a better way to describe it. Having the phase resemble the minimum phase for the frequency response...

I don't think so. There is one right way to do it, there is a standard, AES48 https://www.aes.org/publications/standards/search.cfm?docID=44 Some good explanation from Bruno Putzeys on the why in the wiring section https://www.edn.com/the-g-word-how-to-get-your-audio-off-the-ground-part-3/ The...

http://www.troelsgravesen.dk/FUSION-BI-AMP/AN_Legacy_pin_1_problems.pdf "Pin 1 is not an audio connection. Pin 1 is for shielding."

This is what it looks like when I open the Akabak example project, this is before the mesh is solved for so there are no triangles. I have never tried to run it through an emulator, I can't imagine that is a great idea from a performance point of view. I have it on a native Windows server and...

It looks like the normals of some of the elements are pointing in different directions. These set which way the element is pointing to the interior or exterior. It will appear transparent from the outside looking in.