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Old 9th January 2007, 01:09 PM   #1
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Default Best TL Sub Design You Have Seen?

I have everything ready to build my first TL Sub, but I am just looking to copy someone elses box design for the most part.

What do you guys think would make for a great cabinet? Size does not matter! Literally!

Pics/links would be appreciated,

Thanks,
Dominick
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Old 9th January 2007, 02:22 PM   #2
DorinD is offline DorinD  Romania
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See that:

http://www.speaker-online.de/bauen/tlsub.htm

or mine's

http://www.hi-fi.ro/fhifi/viewtopic....=asc&start=120
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Old 9th January 2007, 02:39 PM   #3
freddi is offline freddi  United States
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Hi DorinD - might you give details on that beautiful midbass horn?

Freddy
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Old 10th January 2007, 08:48 AM   #4
DorinD is offline DorinD  Romania
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Hi Freddi,
Look at this subject:

http://www.diyaudio.com/forums/showt...66#post1056466
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Old 13th January 2007, 06:17 AM   #5
Ang is offline Ang  United States
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DorinD - what sensitivty are you getting out of that? Thanks.
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Old 13th January 2007, 06:26 AM   #6
Geoff H is offline Geoff H  Australia
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http://www.audioheritage.org/vbullet...ad.php?t=12126

Scroll down just past halfway. That is a sub.

Geoff.
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Old 14th January 2007, 06:49 AM   #7
eTapio is offline eTapio  Germany
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Hi,

you should give a Zyklop-TL a try, with an Eminence Lab 12 driver. This one rocks!

http://www.lautsprechershop.de/hifi/zyklop_tl_en.htm


Regards
Tapio
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Old 14th January 2007, 07:43 PM   #8
DorinD is offline DorinD  Romania
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@Anq
In the first version of my TL sub (passive crossed to mains) I go with the line completely unstuffed and sensitivity was pretty good, a little more than 90dB@100Hz and just a little less (3-6dB) than of the bass-horns at the same frequence (there is an other trick here because TL has 2 drivers of 4ohm each configured isobaric but the mains have 8 ohm nominal).

But after I stuffed the line to increase the control of it (unstuffed was too boomy on the room's resonances) the sensitivity gone down by another 6dB but not a problem for an active system now.

All these figures are very, very aproximative because were determined by simulation and comparisons to horns in an untreated room.
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Old 15th January 2007, 10:40 PM   #9
Xmax BR is offline Xmax BR  Brazil
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Dear,

See:


http://www.htguide.com/forum/showthr...light=finished

or

http://www.diyaudio.com/forums/showt...65#post1076465



Click the image to open in full size.


Tks,

Renato
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Old 20th January 2007, 06:45 PM   #10
bjorno is offline bjorno  Sweden
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Geoff H:

Quote:
Scroll down just past halfway. That is a sub.
Hi,

FYI:
I’ve spent some time looking for suitable drivers that really reach the infra region without the need of active compensation by modelling sub enclosures with MJK: s eminent software’s.

Maybe the right way is to use drivers that are suitable for IB/OB like the Altec 3182 or similar if very low extension is the primary goal.

I was surprised of what could be achieved with J.Bouska’s folded transmission line loudspeaker and decided to compare with a driver in an enclosure I know is powerful, a DBR with AURA NS18-992-4A:

After reading at: http://www.audioheritage.org/vbulle...ead.php?t=12126 and looking at the result of my simulations I don’t agree with the conclusions made and that can be read from post #7 and so on. See my plots.

Nevertheless, it looks indeed promising to build the tall cylindrical speaker that measures dia. about 20” or 50 cm by 88.5” or 225 cm and use only one that could be placed at a position where the lowest room modal frequencies are invoked, in the front or at the rear of room.

All other subs, two or more could then be of more modest sizes and have cut-off within the modal range of the room placed preferably at a listening angle of more than 45 (to 90) degrees, e.g. rather laterally placed in the cone of confusion to ensure good audibility in order to externalise low frequencies at the sub and infra regions that follows from the possible exited pressure gradients. See:

http://www.world.std.com/~griesngr/asa05.pdf

See the simulations of the J.Bouska’s Altec sub that follows:

b

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