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Originally posted by Paul Ebert
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That would work, but the lower Qms and Vas don't quite have the same tuning range that the DSA does.R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51
95% of Climate Models Agree: The Observations Must be Wrong
"Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist. -
The single 4 Ohm Anarchy with 10" PR in .6 cubic feet would work well since the 8 Ohm is apparently out of stock.Originally posted by silverD View Post
I have a pair of NeoCD1.0 and CAM558 looking for some anchors
Was thinking of using my pair of 8V416J for a pseudo canTiLena, but maybe the Anarchy & PR combo would be fun. Thoughts?R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51
95% of Climate Models Agree: The Observations Must be Wrong
"Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.Comment
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Pete, how much added mass are you looking at for the PR? I ran some sims in Unibox that look really good but I haven't seen any information on how much mass the DS PR can accommodate.Comment
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120 grams on each PROriginally posted by davidroberts View PostR = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51
95% of Climate Models Agree: The Observations Must be Wrong
"Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.Comment
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What are you seeing for the F3 & Fb? What are you using to model them?Originally posted by Pete Schumacher View Post
I am using Unibox to model the 4 ohm in .6 CFT and I am having to add a lot more mass. I think I am using the T/S parameters that you posted but I may still be doing something wrong...Comment
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I was using WinISD and the parameters pulled from the PE website for the SDA270 PRs. The pair of them tune 1cf to 41Hz which in this simulation produces F3 at 38Hz. But that's with a pair of 8 Ohm.
Using the parameters I measured for the 4 Ohm Anarchy, and the same 120 grams on a single PR in .6cf, F3 extends to 35 but with an EBS alignment (shelving of the bass response). Nothing at all wrong with that.R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51
95% of Climate Models Agree: The Observations Must be Wrong
"Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.Comment
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Who's using them,,,count me in.
Super woofers....fabricated several boxes and now using three MTM's in the HT.
(pic)
The woofers are beautifully made and with a few crossover (passive) parts have a very nice, flat response.
*Don't even bother to turn on the subwoofer on most of the time..
Actually I wonder why more people are lined up to try them.Last edited by HIFY GUY; 01-13-2019, 01:42 PM.Comment
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Question, any measurements for the 8 ohm version plz?
I saw there are some for the 4ohm woofer, but what about the 8ohm?
Thanks!Comment
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Here are measurements from a design that I did.Originally posted by HIFY GUY View Post
Attached FilesComment
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rickcraig - vented I presume? Box params please? I presume the nearfield is combined port / driver response?Comment
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Rickcraig,
Very helpful, thank you for posting.
Looks like a very flat response, which I have also seen with completed projects.
Originally posted by rickcraig View PostComment
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Based on the Zpeaks, is the box undersized ?Comment
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.75 cubic ft. with a 2"x 6" port (possibly 7", I would have to check my notes). Yes, combined woofer and port response.Originally posted by Dave Bullet View PostComment
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No, in fact it's larger than some of the other designs I've seen, as much as 50%.Originally posted by norman bates View PostComment
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They also work well in a .5cf sealed enclosure."He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
http://www.diy-ny.com/
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