Some speaker driver measurements...

[wesayso]

you will get an unwanted horn...

Or a desirable waveguide

 

[JanRSmit]

Hello friends. Has anyone studied the issue of installing the 3" midrange in depth in order to match the centers of acoustic radiation for a 3-way speaker? These ones has a large dome and I'm afraid that it doesn't have a better place on the flat front panel. And if you drown it inside, you will get an unwanted horn...

You can measure the approximate centre of acoustic radiation. With arta and 2-channel impulse meas you get a good idea. Use highest sampling frequency.

 

[HiFiCompass]

BlieSMa T34P-4 paper dome concept-tweeter:
https://hificompass.com/en/news/measurements/bliesma-t34p-4-paper-dome-concept-tweeter

 

[motokok]

Thanks for a great review, @HiFiCompass. Out of interest, what do you use for DSP corrections when doing your listening tests?

 

[HiFiCompass]

Thank you. I use the Xilica XM-2040 module

 

[IamJF]

Will you try a passive trap circuit to tame the resonance? It should have benefits in reducing THD of harmonics of the resonance compared to active EQ.
This tweeter should be "bundled" with a fitting passive circuit to get it at least somewhat linear.

But that's not my cup of tea - I will stick with Beryllium

 

[HiFiCompass]

This tweeter has so low distortion that I don't bother about their further reduce

 

[augerpro]

For some reason my work computer has never allowed me to connect to HiFiCompass's site. Can someone post the response plot for this new paper T34? I've actually been wondering about this possibility since they came out with mid. Seems like a cool idea.

 

[tktran303]

Reference:
https://hificompass.com/en/reviews/bliesma-t34p-4-paper-dome-concept-tweeter

 

[augerpro]

You da man Thanh

 

[hifijim]

I have to say, I am more in love with the T34A... But with a PEQ of -12 dB at 15k, this paper version might work out well...

 

[IamJF]

Over the years I experienced with my tests that I prefer tweeters with their resonance as far out of the hearing range as possible (Beryllium) or with no resonances (ring radiator). That's not a tweeter for me I'm afraid ...

 

[wolf_teeth]

So, the P-4 is not doped/coated at all? It reminds me visually of the Philips AD0210/SQ4 pair of 'felted' paper mid domes I have, and those aren't doped either. I honestly feel at least a doping of the tip of the P-4 should be required for best top-octave performance.

 

[tktran303]

Over the years I experienced with my tests that I prefer tweeters with their resonance as far out of the hearing range as possible (Beryllium) or with no resonances (ring radiator). That's not a tweeter for me I'm afraid ...

Even after correcting for it with a series notch filter?

I wonder what mechanism(s) are at play here.

 

[HiFiCompass]

Thank you for a donation, Thanh (tktran303)! God bless you and your family!

 

[HiFiCompass]

The BlieSMa T34D-4 Diamond Dome tweeter review:

https://hificompass.com/en/reviews/bliesma-t34d-4-34mm-diamond-dome-tweeter-review

 

[profiguy]

Alot of companies use silicone oil to impregnate their speaker cones anf surrounds with. It works very well but it needs the correct carrier material composition to not wick away over time. Many fullrange drivers with one piece cone/surrounds use silicone in the surround unless they coat it with something afterwards.

 

[HiFiCompass]

The measurements of the B&W 1" diamond dome tweeter for BMW cars:

https://hificompass.com/en/speakers...rs-wilkins-65139350327-1-diamond-dome-tweeter

 

[profiguy]

Looks clean and fast, but too much H3 down low. Funny how they tout their new diamond dome as having so much more extension up top. It falls off quickly past 20k. A good Be dome will be better in this area despite the primary HF breakup.

 

[racingpht]

I find the sound of 18we a bit warmer, lush and softer compared with 18wu, maybe because a bit stiffer cone and more odd harmonics of the 18wu woofer.
I don't like aluminum SB speakers in the midrange at all no matter how low their distortion are

Talking about timber of paper cones, would you consider MW16p more towards "stiffer paper" cone or "softer paper"?

Actually I tempted to coat my MW16p's paper cone surface with Visaton LTS50 (similar to those Seas coated paper cones), and since you talked about different paper cones a lot, I would love to know your opinion first