Nothing really, good phase aligment does exactly that: Avoiding cancellation...

Well it does effect phase, it just doesn´t effect it very much. Imagine a sine wave at 150Hz. You want to avoid that the peak of one driver and the valley of another driver overlap and create interference cancellaction. Lets say each driver puts out its signal in perfect phase aligment just the...

The Wavelength of 150Hz for example is 228cm don´t worry about tube length ;)

Not quite sure what you mean by tight? a high value damper acts as a lowpassfilter and a lowpassed filter wont exactly sound crystal clear.

Take the highest.

Are you sure this is totally sealed? A simple high pass shouldn't be this steep.

This looks like a low pass filtered driver for me. Compare the unfiltered curve with the lowpass to the unfiltered curve of the normal driver and you'll see the difference. This RC Filter is a first order lowpass it is just 6dB dropoff per octave you can't expect just the sound to disappear...

Where do you work?

Where did you cut your wire exactly? If you cut it befor the Y section one is the positive of the left one is the positive of the right and one is ground. (Its called stereo sound, crazy i know!)

For that i would like to see a source. Edit. I don´t want to come of as rude! It is a good idea to potentially make a system more sensitive. I just doubt that a boucherot cell is needed or benificial for anything other than improving crossover behavior.

A zobel filter creates a second path in parrallel to the driver with a reversed impedance effectifely creating a voltage devider and smoothing the imepdance. You are right in that this additional pathway consumes power. and creates heat. So when you said that you wanted to use that wasted...

Now built this in with a normal zobel configuration and compare the output. Only if there is less output in dB this can be considered energy saving.

Dope! That is some damn fine work.

Thanks! Smaart is pretty expensive for a hobbyist :( . I´ll look into this topic a bit more there must be a way which is cheaper.

Can someone tell me how JH Audio measures the phase/time aligment? What software do they use and how do they wire up the drivers? I can´t wrap my head around it, in order to measure phase you would need to drive each driver individually right? But you also need to go through the propper...

Are you just hooking up this one driver? Generally a HPF or LPF does not introduce new peaks but it can definitely happen. A Zobel Network can sometimes be used to tame a weird crossover behaviour.

I found this test, i don´t think a tinnitus test is the same. https://www.thebsa.org.uk/wp-content/uploads/2011/04/Uncomfortable-Loudness-Level-1.pdf

Does it need to be super flat for you? Do you want to use your IEM as actual monitors? If not don´t worry about neutrality or flatness just tune them like you want them. You said you allready had a response that sounded good for you use that.

Uhh good question. I am in the lucky position that i have a friend with a home studio and measured in monitor speakers. But guess for 200-300 €/$ you can get a nice pair of studio monitors. Edit: A quick internet research shows me that the Yamaha HS 8 are in quite a few best of lists in the top...

Doesn´t suprise me at all, our ears are quite different. The best approach to see what would sound flat to you in my opinion the Griesinger Method with pink noise. " Using a known flat/accurate loudspeaker positioned in front and up close (to minimize room effects), alter the loudness of pink...

That's crazy flat!

Allright, i guess where are on the same page than.

I get that you simplify but why take the DCR value and not the average impedance you get of the datasheet? Take this knowles CI-22955 curve for example. DCR would be roughly where i painted the red line (20Ohms). If you cross before 300-400 hz sure go ahead and use the DCR (if so you don´t need...

Ok... but even with theoretical flat impedance (which is not the case when a zobel is used, it is just more flat) impedance ≠ DC resistance.

You should use the stated impedance in the datasheet at the crossover point. The Drivers DC resistance does not matter as you are feeding your drivers AC. Impedance is frequency dependend resistance. A normal resistor has no impedance change (in the frequencys we find important) to care about...