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Multi-Way Conventional loudspeakers with crossovers

A vintage-style, sealed enclosure, 3-way loudspeaker with dome tweeters
A vintage-style, sealed enclosure, 3-way loudspeaker with dome tweeters
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Old 3rd August 2019, 06:04 PM   #1
marabella is offline marabella  Germany
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Default A vintage-style, sealed enclosure, 3-way loudspeaker with dome tweeters

Hello

Some pictures first:

3W_1.jpg

3W_2.jpg

3W_3.jpg

Eton 11_581_50Hex, Morel EM1308 and ET338
(preliminary) Behringer DCX2496 crossover: 600Hz/24dB-Butterworth and 3000Hz/12dB-Butterworth
bass -3dB at 55 Hz
Costs per LS: approx. 750€


I would like to spare myself any metaphorical sound descriptions here.

The loudspeakers exactly deliver what you can expect from drivers of this quality. I listen to music for hours - completely stress-free, relaxed and absolutely delightfully.

The "sound" immediately reminded me of the Focal "Temptation", which I was totally enthusiastic about in ancient times. This is because of the domes, which do their job well and create an incredibly wide stage.

I can, at a distance of about 4m, easily move 2m to the side, without the spatial representation changing significantly. Classical music lovers should be thrilled and even with 3 people on the sofa this should work wonderfully. With "Oxygene", my ultimate test, the loudspeakers disappeared immediately. Only a few can do that at all.

Very low bass is audible, but due to sealed enclosure quieter. On the other hand, its much drier/contoured. The damping, pi times thumb plus experience, seems to fit and thanks to 2.5l polystyrene filling there is still enough space for fine tuning. Seems superfluous to me at the moment. I can't measure under 200Hz anyway.

Interesting: At 8.5KHz there is a -4dB dip. I found the reason when I converted this frequency to its wavelength - about 4cm. This corresponds to the radius (minus dome) of the tweeter mounting plate. I covered it with paper all around the baffle and the dip disappeared.

The drivers will be set flush with 5mm needle felt, the cabinets and stands are going to be painted neatly and then I'll post more pictures and frequency charts.

It may take some time, because my shoulder hurts a lot :-(.

Until then and many greetings
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Old 3rd August 2019, 06:49 PM   #2
Juhazi is offline Juhazi  Finland
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Measurements? The Eton should take moderate bass eq easily and with dsp it is piece of cake to tune the room response to your liking.
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Old 3rd August 2019, 07:43 PM   #3
Pano is online now Pano  United States
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A vintage-style, sealed enclosure, 3-way loudspeaker with dome tweeters
That's a very classic looking speaker. I've never used the Morel domes in any of my projects, but I sure do like they way they sound in commercial products. They seem very natural.

Thanks for the post!
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Old 3rd August 2019, 08:11 PM   #4
marabella is offline marabella  Germany
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@Pano
Just went, while writing, into my listening room and felt embraced.

@JuHazi
Yes. Agreed. But call me an old school purist.
I think I will try this.
Measurements are coming.
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Old 4th August 2019, 12:11 PM   #5
xrk971 is online now xrk971  United States
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A vintage-style, sealed enclosure, 3-way loudspeaker with dome tweeters
Nice project! Always wanted to try a mid dome.
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Old 4th August 2019, 01:26 PM   #6
Guerilla is offline Guerilla  Denmark
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If it sound right, it doesn't really matter much, but do you guys think there would be benefits by loosing outer parts of mounting plates, to make it possible to group drivers closer? Might be posible to drill resessed mounting holes right outside the magnets diameters.
Cheers
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Old 4th August 2019, 02:04 PM   #7
adason is offline adason  United States
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done that with dayton domes
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File Type: jpg DSC_0004.jpg (927.4 KB, 371 views)
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Old 4th August 2019, 02:04 PM   #8
adason is offline adason  United States
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Sorry for sideways picture, stupid phone...
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Old 4th August 2019, 06:31 PM   #9
marabella is offline marabella  Germany
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Changed low-mid co to 700Hz (600Hz were a bit tight) and mid-high characteristic to 18dB Butt.

Morel.jpg

Quick and dirty put the mic 1m in front of the LS.
- blue - with dip at 8,5KHz
- green - quickly set up a filter on the DCX. OMG, that's easy.

Please ignore everything below 200Hz. It's my listening room.
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Old 4th August 2019, 06:58 PM   #10
Juhazi is offline Juhazi  Finland
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Looks like you haven't compensated for baffle loss below 500Hz. It is really worth doing! In nearfield measurement you should have slowly rising response/spl in bass.
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