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Multi-Way Conventional loudspeakers with crossovers

Onken for Altec 515-16G
Onken for Altec 515-16G
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Old 13th March 2019, 11:11 PM   #1
Rob Dingen is offline Rob Dingen  Netherlands
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Default Onken for Altec 515-16G

Hi,

Did a lot of reading and use several Excel SS to calculate the size of the cabinet.
What I find is an size of 250L to 300L and a S vent of 600 cm² and about 30cm long.
Resistor 5 to 6 Ohm.
Did I do this right or has someone a better proposal?
I have 4 Altec 515-16G.
Maybe there are better enclosures for them.
I want to build a two way with a Yuchi horn on top so it has to be a reasonable height, say not above 85cm

Rob
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Old 13th March 2019, 11:18 PM   #2
Norelco is offline Norelco  Philippines
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Try the Altec 817 Onken for Altec 515-16G
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Old 14th March 2019, 12:54 AM   #3
Rob Dingen is offline Rob Dingen  Netherlands
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Hi Norelco,

I think they don't go very low.
Do you have them and do you have measurements?

Rob
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Old 14th March 2019, 01:22 AM   #4
Pano is offline Pano  United States
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Onken for Altec 515-16G
Never heard an Onken with a 515. I'd be worried about the low end. What do your sims show? 360L was the classic size for the 416.
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Old 14th March 2019, 01:24 AM   #5
GM is offline GM  United States
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817/515-8G factory measurement [scroll down]: http://www.lansingheritage.org/image...515g/page3.jpg

GM
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Old 14th March 2019, 01:51 AM   #6
Pano is offline Pano  United States
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Onken for Altec 515-16G
Better than I thought. Gotta look up the volume of an 816. 6 cubic feet, maybe?
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Old 14th March 2019, 02:07 AM   #7
GM is offline GM  United States
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Quote:
Originally Posted by Pano View Post
Never heard an Onken with a 515. I'd be worried about the low end. What do your sims show? 360L was the classic size for the 416.
The 8G has a ~37 Hz Fs, so if tuned to it, it's flat enough to be 'boomy' in some rooms and definitely when near/at a corner, so in some cases need to be either damped or tuned lower. The ~20 - 25 Hz 515s OTOH are definitely bass shy compared to the 416s except in a corner.

Size wise, the pioneer's Vas/1.44 works a treat, so ~244 L tuned to Fs with Av = Sd vents and damp to 'taste'.

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Old 14th March 2019, 02:21 AM   #8
GM is offline GM  United States
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Quote:
Originally Posted by Pano View Post
Better than I thought. Gotta look up the volume of an 816. 6 cubic feet, maybe?
Dunno, don't recall ever figuring it out since I learned the hard way with 210s that I don't like parallel horn walls, so chopped down 825 cabs to the pioneer's original 'one size fits all' ~6 ft^3/45 Hz MI specs. Seems reasonable then that your guess is spot on or TTBOMK certainly good enough.

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Old 14th March 2019, 01:44 PM   #9
Rob Dingen is offline Rob Dingen  Netherlands
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Hi,

I listen at the moment to 4 times the 816 cabinets.
They are very bass shy.
If I look to the measurements of the 816 and 817 they are very similar except SPL.
I can build a cabinet with one woofer no problem it wil be active driven.

Rob
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