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Multi-Way Conventional loudspeakers with crossovers

Beyma 15XA38Nd in Tannoy GRF style enclosure
Beyma 15XA38Nd in Tannoy GRF style enclosure
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Old 13th June 2019, 08:06 AM   #21
jtgofish is offline jtgofish
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Originally Posted by hifisucks View Post
Do you have any information for a Onken style box?
I found this Der Monitor
I could build that... :-)

Yes something like that should work well.
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Old 13th June 2019, 10:16 AM   #22
hifisucks is offline hifisucks  Germany
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Is there a reason for the vents on the side? If your room is very large without limitations... okay...
But could I put them beneath the chassis?
Or will the speakers breath better when on the sides?
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Old 13th June 2019, 11:25 AM   #23
ewollowe is offline ewollowe  Australia
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Great work with simple tools. Respect.
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Old 13th June 2019, 02:23 PM   #24
ICG is offline ICG  Germany
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Quote:
Originally Posted by hifisucks View Post
Is there a reason for the vents on the side? If your room is very large without limitations... okay...
But could I put them beneath the chassis?
Or will the speakers breath better when on the sides?
The Onken enclosure is - essentially - a BR box with large port surface and evenly spread ports. The large distributed port surface area gives a good punch, the air coupling is better than one single and smaller port and the air load on the driver is practically symetrically.

The Onken enclosure got 3 disadvantages, the ports will be long, so it pretty much limits the use to 'oldschool' parameter drivers and big enclosures because 'small enclosure' parameters would lead to impossibly long ports. Then there is the size since the port positioning and volume they take up increase the dimensions. And lastly, the decay is delayed in the mid, which means its best use is in a 3- or 4-way, its worst use is for fullrange or small enclosures.

If you put them on the bottom, you'll reduce it to a plain BR box.

There is another way you can get great results and don't increase the size of the box, you could use a passive membrane. Unlike ports, it doesn't take up enclosure volume, it keeps the mid-garbage within the speaker, it got a very big 'port' area and it's easily tunable (add/remove weight) and you can realize ported speakers/subs which were impossible without because the port would be way too long, had to be folded and/or would cause compression, turbulences, losses, length-resonances and port noises (chuffing). The downside is, you have to spend more, passive radiators should be cheap, they often are not though.
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Old 15th June 2019, 06:45 AM   #25
hifisucks is offline hifisucks  Germany
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Onken would be around 150 liters with the Beymas...
You lit my Bastelfeuer again... :-)
THanks... will open a new thread concerning Beyma Onken combination... :-)
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