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Multi-Way Conventional loudspeakers with crossovers

Open source speaker project - Part II
Open source speaker project - Part II
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View Poll Results: Design Goal
Classic -Amp Friendly- Hi Sensitivity (92db+), Higher Bass Ext (f3 40-45Hz), Cabinet Size 60-80 18 17.82%
Classic -Bass Friendly- Deep Bass (f3 35-40Hz), Lower Sensitivity (88db+), Cabinet Size 80-110 10 9.90%
Classic XL -Amp and Bass Friendly- Hi Sensitivity (92db+), Deep Bass (f3 35-40Hz), Cabinet size 100+ 12 11.88%
Tower -Amp Friendly- Hi Sensitivity (92db+), Higher Bass Ext (f3 40-45Hz), Cabinet Size 60-80 13 12.87%
Tower -Bass Friendly- Deep Bass (f3 35-40Hz), Lower Sensitivity (88db+) , Cabinet Size 80-110 21 20.79%
Tower XL -Amp and Bass Friendly- Hi Sensitivity (92db+), Deep Bass (f3 35-40Hz), Cabinet size 100+ 27 26.73%
Voters: 101. You may not vote on this poll

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Old 21st September 2018, 05:24 PM   #141
andy19191 is offline andy19191  Europe
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Quote:
Originally Posted by mbrennwa View Post
In order to "build the speaker" you need to know what to build (box dimensions, which drivers, filter circuits, etc.). To figure that out, the designers need to measure drivers, build prototypes, and tweak the design. This was something that was mentioned a few times in part I of the thread. It would be wrong to let the designers invest a lot of their time for the design, and then even ask them to pay for the whole thing.

I guess it would be fair if everyone interested in the Open Source Speaker would provide a little bit of his cash and make himself a proud sponsor of the design (be it the Monkey Coffin of the XL Tower).

In any case, this is certainly not the first "open source project" that hits the point where money is needed. I have no experience with this, but I am sure there are good ways to make this work. I remember someone offered help to raise funds, but I cannot find that post anymore. Maybe I am searching for the wrong terms. Was that in part I or part II?
This might explain some of my bafflement with this/these projects. You are proposing to perform a few rough calculations before buying some drivers, measuring, building prototype speaker, measuring, modifying speaker, measuring,... You don't intend to spend a significant amount of group effort and time in evaluating the options and optimising the design first on paper as I, and possibly others, had assumed?

I had also assumed that after the design looked good on paper one or two might buy and build the speakers for themselves enabling further refinement to take place. This is why I have only been interested in being involved in designs for which I believe there is a demand unlike the high sensitivity designs currently being discussed for which I think there is low demand. But then it only needs one to be sufficiently happy to buy the parts, build, measure and tweak in order to complete the project.
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Old 21st September 2018, 07:57 PM   #142
mbrennwa is offline mbrennwa  Switzerland
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Quote:
Originally Posted by andy19191 View Post
This might explain some of my bafflement with this/these projects. You are proposing to perform a few rough calculations before buying some drivers, measuring, building prototype speaker, measuring, modifying speaker, measuring,... You don't intend to spend a significant amount of group effort and time in evaluating the options and optimising the design first on paper as I, and possibly others, had assumed?

I had also assumed that after the design looked good on paper one or two might buy and build the speakers for themselves enabling further refinement to take place. This is why I have only been interested in being involved in designs for which I believe there is a demand unlike the high sensitivity designs currently being discussed for which I think there is low demand. But then it only needs one to be sufficiently happy to buy the parts, build, measure and tweak in order to complete the project.
Stop trolling please.
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Old 21st September 2018, 08:46 PM   #143
Aatto is offline Aatto  United States
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Quote:
Originally Posted by andy19191 View Post
This might explain some of my bafflement with this/these projects. You are proposing to perform a few rough calculations before buying some drivers, measuring, building prototype speaker, measuring, modifying speaker, measuring,... You don't intend to spend a significant amount of group effort and time in evaluating the options and optimising the design first on paper as I, and possibly others, had assumed?

I had also assumed that after the design looked good on paper one or two might buy and build the speakers for themselves enabling further refinement to take place. This is why I have only been interested in being involved in designs for which I believe there is a demand unlike the high sensitivity designs currently being discussed for which I think there is low demand. But then it only needs one to be sufficiently happy to buy the parts, build, measure and tweak in order to complete the project.
we had different options in the poll, not just high sensitivity ones !
Andy you are not helping. you can change your tone if you think there s a better way to approach.
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Old 22nd September 2018, 07:17 AM   #144
Lojzek is offline Lojzek  Croatia
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Perhaps a group design will prove to be a mission impossible, in our case. We will stay tuned and hope for the best. I don't see a purpose of getting emotions in the way of a progress. Andy has raised some very good points but there appears to be a lack of understanding in that sense.
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Old 22nd September 2018, 08:34 AM   #145
mbrennwa is offline mbrennwa  Switzerland
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Originally Posted by Lojzek View Post
Andy has raised some very good points but there appears to be a lack of understanding in that sense.
Maybe I was just not clever enough to see this. Can you please enlighten me (and maybe others)?
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Old 22nd September 2018, 09:43 AM   #146
KaffiMann is offline KaffiMann  Norway
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I dont know, maybe it's ok to help pay materials for prototype boxes and xo parts. Just to get it all ironed out 100%. It does cost a lot of time and money.

But it does not sound right to me to get people to pay for the complete build including drivers. I think the prototype builders should keep the speakers, or sell them for a fair price, whatever they want.

Edit:
And if there is money left over after the project, all of it should be donated to Diyaudio.
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Last edited by KaffiMann; 22nd September 2018 at 09:47 AM.
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