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Multi-Way Conventional loudspeakers with crossovers |
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#3281 |
diyAudio Member
Join Date: Oct 2002
Location: Vermont
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Erik that is an excellent idea and implementation.
Great build, kudos!
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#3282 | |
diyAudio Member
Join Date: Feb 2005
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Quote:
But I talked to John from Acoustic Elegance, he told me the following: "I have had quite a bit of experience with the TPL150 and the TPL200. For open baffle use, you could go to 1000hz because the power requirements are much lower than in pro sound use. However, they are better crossed higher. Distortion will stay much lower. I wouldn't go with the LO15 up past 1000hz. Any 15 "narrows to less than 90 degrees by 800-850hz. That is really the upper end you want to take a 15" driver. Personally I would use 2x Dipole15, the TD8M, and the TPL200H. Crossing about 250hz and 2500hz. The TD8M has plenty of output to keep up with the TPL200. The 2x Dipole15's will give you far more output ability down low and the TD8M gives the best midrange of all the options." So I decided to go for the 3-way active version, including the TD8M speaker. You're right, I was inspired by Kryon, for many years I wanted to do something similar ![]() The system will be made up of W10 - JRiver - EKIO software crossover - an 8-channel DAC (DAC8PRO) - two XA30.8 amplifiers for highs and mids + a class D PRO-2M amplifier for bass. I will also try the correction. |
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#3283 | |
diyAudio Member
Join Date: Mar 2003
Location: Zürich
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Quote:
As this thread is meant for pictures, here one of the line arrays. I have a thread for them, which needs some updates ![]() Dipole Line array with GRS Slim 8" and Visaton WS25e
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my surname is indeed 'de Best': neither misspelling nor snobbism! Ask SY! ![]() |
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#3284 |
diyAudio Member
Join Date: Dec 2001
Location: Germany
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Very nice room divider! I see 9pcs of WS25E!
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#3285 |
diyAudio Member
Join Date: Jan 2012
Location: Switzerland
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Thanks for the reply. Your choice of DAC is great, I have been thinking about upgrading from my miniDSP 4x10HD. Those Passlabs amps look and likely sound awesome, it seems you're not constrained by budget in your build!
The Kronos is of course a drool-worthy system, though with regards to the other comments regarding the benefits of 4 way systems, I wonder how even the polar response is around the crossover point between the woofer and the tweeter. Did you consider other options for the tweeter section? Using, for example, two back-to-back BlieSMa tweeters BlieSMa_T34B-4 would allow you to have a dipole tweeter section. They have excellent FR, super low distortion, great off-axis characteristics, and can be crossed over at 2,5 kHz too. I'm not sure how well they would integrate with the AE woofer though in terms of FR, dispersion, and sound. |
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#3286 |
diyAudio Member
Join Date: Nov 2002
Location: UK
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Having recently finished my first open baffle design I thought I'd add it to this interesting thread.
I'm very pleased with their very open and transparent sound. Last edited by TimA; 2nd February 2021 at 12:04 PM. |
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#3287 | |
diyAudio Member
Join Date: Dec 2001
Location: Germany
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Quote:
How did you construct the frames for the cloth? |
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#3288 | |
diyAudio Member
Join Date: Jan 2012
Location: Switzerland
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Quote:
Beautiful, particularly your work with the fabric covers looks very nice. Could you share further specs of the speakers and your system, and some of your design considerations? |
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#3289 |
diyAudio Member
Join Date: Nov 2002
Location: UK
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Thanks for the favourable comments.
The rear frames are rather complex and took a few days to construct. Materials are a combination of hardwood and mdf. They are at least strong enough not to fall apart on their own. I considered easier/stronger alternatives but none would have been as open acoustically. They are attached with small magnets. Design criteria was that they need to sound at least as good as my Quad 63s, which they do, and to look good. from previous listening experience I wanted to keep the capacitor count in the treble section to a minimum, therefore the HP filter needed to be 2nd order at most, hence the need for a 1.5kHz notch filter connected across the tweeter which was not necessary with a steeper slope but which I consider much less of a problem sonically than a second series capacitor. I have attached the Xover. Drive units are Eminence Alpha 15a Seas H1571 Mundorf 2330 (chosen due to its open back design). Modelling in Tolvan Edge showed that the midrange needed to be offset as far as possible to the side for the flattest response but this also made the rear frame more complicated due to the large magnet. Another consideration was keeping the 'wings' as small as possible, again for the most open rear radiation. Last edited by TimA; 2nd February 2021 at 02:27 PM. |
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#3290 |
diyAudio Member
Join Date: Jan 2012
Location: Switzerland
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Thank you for the additional details. The choice of components looks fine indeed and the overall FR is smooth!
Have any issues arisen with choosing to have such a shallow low-pass filter for the sub-woofer? At 2 kHz it's only 20 dB down, and while I'm not aware of the details of how the Eminence performs, sub-woofers often have issue with 2hd, 3hd at those frequencies. Did you consider going for active cross-overs to implement steeper curves? |
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