I found this page from the web, what do you think about it?
http://www.ptt.yu/korisnici/s/r/srmarkovic/speaker.htm
This got me interested, because one Hifi-store sells away the 30W100 12" woofers with a nice price 🙄
http://www.ptt.yu/korisnici/s/r/srmarkovic/speaker.htm
This got me interested, because one Hifi-store sells away the 30W100 12" woofers with a nice price 🙄
The pictures are interesting. I will make no jokes about woofers.
I used a 30W100 in a TL, dimensioned not too differently than the one you have. It was very nice, but no way did I have any significant SPL at 18 Hz.
I used a 30W100 in a TL, dimensioned not too differently than the one you have. It was very nice, but no way did I have any significant SPL at 18 Hz.
What HI-FI store sells Dynaudio units? Very interesting.
Wish your team the best of luck in the ice hockey world cup finals.
Wish your team the best of luck in the ice hockey world cup finals.
SY,
Yes, the TL design looks nice in the picture, but unfortunately very large box is needed. I wonder how 30W100 would work in a 120L...140L sealed or bass-reflex box?
Or perhaps I should just stick with Peerless 831727 or 850146 10" driver. It's hard to decide... 😕
Perhaps an aperiodic port (Variovent?) could be used to lower the Qtc of 30W100's sealed enclosure?
Ken Jacobsen,
It is a finnish Hifistore that sells these Dynaudio units. They found them just lying useless in their store, and decided to sell those away with a "nice price"... The page is here:
http://www.hifitalo.fi/shop/showsub.php?id=32
Yes, the TL design looks nice in the picture, but unfortunately very large box is needed. I wonder how 30W100 would work in a 120L...140L sealed or bass-reflex box?
Or perhaps I should just stick with Peerless 831727 or 850146 10" driver. It's hard to decide... 😕
Perhaps an aperiodic port (Variovent?) could be used to lower the Qtc of 30W100's sealed enclosure?
Ken Jacobsen,
It is a finnish Hifistore that sells these Dynaudio units. They found them just lying useless in their store, and decided to sell those away with a "nice price"... The page is here:
http://www.hifitalo.fi/shop/showsub.php?id=32
The T-S parameters of the 30W100 are not optimal for a reflex or normal sealed box. It really needs something like an infinite baffle. Or maybe an aperiodic. But... the price here is so good that you might consider buying four and building an isobaric (it will still be big). I've heard a couple of isobaric systems using this driver, like the Dynaudio Consequence, and was quite impressed.
SY,
If I end up using this driver, I'll propably try ported enclosure first. But if that doesn't sound good, I'll convert it to an aperiodic or sealed enclosure...
If I end up using this driver, I'll propably try ported enclosure first. But if that doesn't sound good, I'll convert it to an aperiodic or sealed enclosure...
Hi!
Help!!
I have a pair of 30w100 but tried to use a 1.7 cub ft cabinet (48"x12"x5.1")
I could increase the 5.1" sides I suppose, yet cannot work out a compromise;
Can you suggest anything please this late in the day!
Paul - The BlakeleyLad
Hi Paul,
According to the pdf here Dynaudio recommends a sealed enclosure of 130 liters for 1 sub. 130 liters equates to 4.6 cubic feet. You could get away with an enclosure half that size if you use isobaric or "clamshell" mounting.
To decipher what Sy said you could try infinite baffle, which is basically where you mount the drivers so that they use an adjacent room, crawlspace, or attic as the speaker box.
An aperiodic enclosure is a sealed enclosure with resistive vents which let you get away with a slightly smaller box. See here: Aperiodic Speaker Enclosure Design
You could also try an open baffle if you can get away with placing them away from the rear wall, have an amp with some bass boost, and don't need a lot of volume. See here: Dipole protos
According to the pdf here Dynaudio recommends a sealed enclosure of 130 liters for 1 sub. 130 liters equates to 4.6 cubic feet. You could get away with an enclosure half that size if you use isobaric or "clamshell" mounting.
To decipher what Sy said you could try infinite baffle, which is basically where you mount the drivers so that they use an adjacent room, crawlspace, or attic as the speaker box.
An aperiodic enclosure is a sealed enclosure with resistive vents which let you get away with a slightly smaller box. See here: Aperiodic Speaker Enclosure Design
You could also try an open baffle if you can get away with placing them away from the rear wall, have an amp with some bass boost, and don't need a lot of volume. See here: Dipole protos
Well, a vintage prosound alignment is by far the smallest practical vented alignment at ~5.91 ft^3 net + fairly large vent, so call it ~6.4 ft^3 gross Vb (~181.23 L) tuned to ~14.5 Hz without resorting to ~aperiodic.
Really, with today's electronics it seems a Linkwitz Transformed sealed cab is the de facto solution for acoustically small (sub)woofer alignments, but Dynaudio knows its drivers best, so 130 L sealed is the smallest one I'd recommend and not much smaller for a ~aperiodic alignment.
GM
Thanks Roger!
Taking all in gradually - I have some of the references...
for now I took off the rear panels, replaced with cotton sheet to contain the stuffing, set a sub-woofer to cut off at 45Hz; sounds smooth
I also have two corner absovers, 6 ft high x 1 ft dia, filled with fibreglass
(wrapped in chicken netting, sleeved in cotton sheets)
Come summer I will attempt the markovic transmission line - the unit cut out needs to be corrected I think - hope to get the naturel deep bass then)
Paul N
Taking all in gradually - I have some of the references...
for now I took off the rear panels, replaced with cotton sheet to contain the stuffing, set a sub-woofer to cut off at 45Hz; sounds smooth
I also have two corner absovers, 6 ft high x 1 ft dia, filled with fibreglass
(wrapped in chicken netting, sleeved in cotton sheets)
Come summer I will attempt the markovic transmission line - the unit cut out needs to be corrected I think - hope to get the naturel deep bass then)
Paul N
Ken, Dynaudio drivers are no longer available for home users. Also that picture and
drawing is not a TL it is a back loaded horn.
drawing is not a TL it is a back loaded horn.
Dynaudio 30W100 cab
Thanks Woody
Ain't education a wonderful thing!
I've had the 30W100's for 16 years, surrounds perished, replacements came from Speakerbits in Melbourne, squashed in a take-away pizza box, but Ok; pricey. Fss without the surround now 13Hz! and only 16hz when new surrounds done... amazing. I gather rubber surrounds would seen Fss jump up somewhat.
Paul N
Thanks Woody
Ain't education a wonderful thing!
I've had the 30W100's for 16 years, surrounds perished, replacements came from Speakerbits in Melbourne, squashed in a take-away pizza box, but Ok; pricey. Fss without the surround now 13Hz! and only 16hz when new surrounds done... amazing. I gather rubber surrounds would seen Fss jump up somewhat.
Paul N
Sounds like an interesting setup Paul. I bet it does sound quite nice.
Good luck with your horn build!
Roger
Good luck with your horn build!
Roger
Fiberglass is not a good choice for stuffing t-lines It is to reactive. Vance Dickinson and others have stated this.
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The 30W100s are awesome drivers. I've been using these in the Dynaudio Finale (with matching passive radiator). Best bass I have ever heard. Surrounds also perished on mine and I had them replaced as well.
I ran two 30W100 subs in my Mazda 626 back in the mid-80's. They are simply the best woofer I've ever heard. They will work well in smaller enclosure than have been mentioned here. Mine was 2.75 cu. ft. per side, built from 1" high-density fiberboard. What you need is the special damped vent DynAudio made called the "VarioVent". It was a round plastic vent about an inch thick and 4 inches diameter that was packed with fiberglass. You cut a hole and snapped it in. Air did not rush out it like a port but it dampened the enclosure in some way.
Dynaudio 30W100 Sub
Hello all,
good to see more people are trying to use these dynaudio speakers.
I will be reconing a pair of 30W100, got the surrounds our of the US.
I still have a brand new pait of 30W100's which I bought a few years ago in Holland to replace the old ones in my Axis-5 loudspeakers.
Currently I live in an appartment, so space is limited, which is not ideal for the Axis-5 big boxes. As we seem to mainly use the speakers for home surround I would like to use a pair of 30W100's to build a subwoofer. I t will have to be an isobaric one in order to reduce volume. In order to further reduce volume I would like to use a GHP set-up, meaning putting a big capacitor in line with the woofer to equalize the speaker in a Qb=0.9 or bigger box. Only this way can I acheive to build a speaker that has a high WAF factor.
There have been a number of articles in the German Hobby-hifi magazine over the years on the subject of GHP design, but I have never seen a design with a high Qts woofer like the 30W100
Has anybody ever used the 30W100 in an isobaric GHP configuration?
Best regards,
Hjalmar
Hello all,
good to see more people are trying to use these dynaudio speakers.
I will be reconing a pair of 30W100, got the surrounds our of the US.
I still have a brand new pait of 30W100's which I bought a few years ago in Holland to replace the old ones in my Axis-5 loudspeakers.
Currently I live in an appartment, so space is limited, which is not ideal for the Axis-5 big boxes. As we seem to mainly use the speakers for home surround I would like to use a pair of 30W100's to build a subwoofer. I t will have to be an isobaric one in order to reduce volume. In order to further reduce volume I would like to use a GHP set-up, meaning putting a big capacitor in line with the woofer to equalize the speaker in a Qb=0.9 or bigger box. Only this way can I acheive to build a speaker that has a high WAF factor.
There have been a number of articles in the German Hobby-hifi magazine over the years on the subject of GHP design, but I have never seen a design with a high Qts woofer like the 30W100
Has anybody ever used the 30W100 in an isobaric GHP configuration?
Best regards,
Hjalmar
I have not, but where did you buy 30W100's? I thought raw drivers weren't available any longer.
Well I bought the 30W100's a couple a years ago from REMO HiFi
He was stocking Dynaudio for professional customers.
He might not have them anymore....
Anyway, these days there are plenty of other choices of loudspeakers for building. The Visaton and Peerless woofers are quite nice and easily available.
The only reason why I want to build a GHP compound subwoofer with the 30W100's is because I have the units available. else I'd find another woofer which allows me to build a smallish subwoofer.
Regards,
Hjalmar
He was stocking Dynaudio for professional customers.
He might not have them anymore....
Anyway, these days there are plenty of other choices of loudspeakers for building. The Visaton and Peerless woofers are quite nice and easily available.
The only reason why I want to build a GHP compound subwoofer with the 30W100's is because I have the units available. else I'd find another woofer which allows me to build a smallish subwoofer.
Regards,
Hjalmar
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