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Multi-Way Conventional loudspeakers with crossovers

Troels Gravesen high efficiency 3-way looks like a winner.
Troels Gravesen high efficiency 3-way looks like a winner.
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Old 10th February 2020, 02:34 AM   #101
Bigun is offline Bigun  Canada
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Troels Gravesen high efficiency 3-way looks like a winner.
Although there must always be some compromises I was wondering how this speaker might perform when a bit more power is available and the woofer operated with the ports sealed along with some EQ to compensate for the fall-off ?
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Old 14th February 2020, 04:48 PM   #102
bluefuzz is offline bluefuzz
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I see Troels has just updated this project with an SBA Beryllium tweeter option. Nice.

He's also done a MkII version of 'The Loudspeaker'. Completely bonkers – although slightly less bonkers than the version 1. I wish I had room for something like that ... ;-/
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Old 14th February 2020, 08:52 PM   #103
mbrennwa is offline mbrennwa  Switzerland
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Troels Gravesen high efficiency 3-way looks like a winner.
Bonkers? Why? I don't get it...
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Old 14th February 2020, 08:54 PM   #104
ErnieM is online now ErnieM  United States
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Bonkers = too big and powerful for most people.
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Old 15th February 2020, 12:07 AM   #105
Bigun is offline Bigun  Canada
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Troels Gravesen high efficiency 3-way looks like a winner.
Quote:
Originally Posted by bluefuzz View Post
...He's also done a MkII version of 'The Loudspeaker'. Completely bonkers – although slightly less bonkers than the version 1. I wish I had room for something like that ... ;-/
excellent, i was thinking of doing that myself - slim down The Loudspeaker but I was thinking about a 12” closed box bass with EQ but I like what Troels has done here. The high cost audiophool parts remain an obstacle for many.
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Old 15th February 2020, 07:56 AM   #106
mbrennwa is offline mbrennwa  Switzerland
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Troels Gravesen high efficiency 3-way looks like a winner.
Quote:
Originally Posted by ErnieM View Post
Bonkers = too big and powerful for most people.
Well, it wouldn't be useful to always design for the needs of "most people" (whatever that might be).
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Old 15th February 2020, 11:06 AM   #107
bluefuzz is offline bluefuzz
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Bonkers? Why? I don't get it...
Because they are way out of reach both size-wise and price-wise of us mere mortals. That's not to say that I don't think it's wonderful they exist!
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Old 15th February 2020, 07:00 PM   #108
Lojzek is offline Lojzek  Croatia
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And where is the problem in building a version suited to your own budget and space? I do not want to hear excuses, it is all written down here on how to do what.
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Old 16th February 2020, 05:09 AM   #109
PB2 is offline PB2  United States
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Originally Posted by Bigun View Post
I think that’s unfair. It was a good response to the preceding criticisms, providing more balance to the discussion.

I’m quite intrigued by this design and am interested to read more of everyone’s thoughts - not least because I learn from those with much more knowkedge and experience than I have.

Troels, in my view, has earned some respect. He has explored many different approaches so he has dealt with, first hand, many examples of the tradeoffs all speaker designs require. I try to learn a little of the why’s and wherefore’s from his articles.

5th element, you are also very experienced. I’ve picked up a lot from your writings.

I like mostly to design and build amplifiers, both tube and solid state. A good speaker for testing amplifiers I build needs to be that strangest of beasts - a chameleon suited to low power tubes and high power transistors, i.e. to be sensitive and have good power handling. Not being a large and expensive or difficult-to-build project makes it a lot more accessible. This latest from Troels may be a candidate.

What tradeoffs did he make that you would do differently? and where the time, effort and cost would be justified by the resulting improvement.
This design should be a floor stander since the space take by the stand is wasted. It needs
more box volume to bring up the output at box tuning, doubling the volume increases the
output by about 6 dB. Take the increased volume and make it flat to 40 Hz or tune a bit
lower with a -3dB in the mid to high 30s.
That said, it seems that he was doing a design to be similar to the JBL L100, and that seems to have driven the size.
The PSB Stratus Gold is a good comp for the size that it should be, or even a bit bigger.
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