Recent content by kimmosto

"Open source" is for softwares. This is diy loudspeaker.

"Open source" is for softwares. This is free diy loudspeaker kit so it should be "free design".

Few years ago I offered to buy all Umik-1 mics from Finland and trash them to avoid continuous and frustrating discussion about problems related to USB mics in design work with XO simulator. I also proposed miniDSP to upgrade their mics to have chip with 2-channel IO, signal output and internal...

I stopped arguing years ago. People are very good justifying why they have acquired Umik-1 or similar, continue to use it and repeatedly recommend it even to those who have no idea what limitations and difficulties they have to face. Some have had a commercial motive, although they talk about...

Traditional box shape without rounding and wave guiding is problematic, but of course balancing could be some compromise between flat on-axis and linear or otherwise smooth power response. It will not cure e.g. sound stage problems to different listening distances and toe-ins due to strong...

2.5-way is very okay also as passive IIR. Phase shift at mid-range could look quite strange in vertical plane, but it can be real benefit compared to 2-way MTM or MMT due to smoother power spectrum. Original XO smells like old-fashioned flat on-axis forgetting everything else.

Probably quite close to the same slopes with parallel ladder XO. Final design and component values requires full measurements of actual system and some data processing.

P.S. I would not use that topology for new design or redesign. Simple traditional parallel ladder is much easier to control. Series XO could drive designer grazy.

Not sure about K=0.15 but otherwise this could replicate most of the original features. Creates this kind of TFs with constant flat ZMA of 8 Ohms. Reality is a bit different of course due to complex curvy impedances.

We could continue by e-mail, but short answer. I understand need for subwoofer and room EQ if: * On-axis response of conventional speakers is flat down to 35 Hz or less i.e. they are primarily designed for near field monitoring in acoustically damped environment and/or have integrated or add-on...

Possibly yes, but I don't need and care about room EQ and subwoofers.

Actual data is case dependent. Different enclosure shapes and dimensions of full space designs produce own response shape so only way to make accurate design with XO simulator without iteration is to measure prototype or final construction and use correct measurement data.

These are master documents when designing with VituixCAD or any other simulator with simple 3D geometry system using mechanical/rotation center for each radiator. Quick manual to produce measurement data with ARTA: VituixCAD_Measurement_ARTA.pdf Quick manual to produce measurement data with...

That is based on some assumptions about DUT. Not necessarily fact in every case. I capture off-axis with CLIO QC and Outline ET. Typical step is 5 deg, 0-180 deg or 0-360 deg depending on case. No problem to let system run for few minutes and have some coffee :cool: VituixCAD draws linear...

Maybe one day, but polarmap is not in top-10 design paremeters and quality measures so why it should be perfect and require some special math other than linear or spline interpolation? It is mostly just entertainment, but of course it has became bigger than life on ASR where self- or...