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Old 23rd August 2005, 03:32 PM   #1
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Default Eclipse TD712z

Has anyone heared these?

They are single driver units and supposedly FR with amazing imaging. The cabinet is a complex casting with various parts including a clemping system for the driver with a weight that is larger than the driver/magnet assembly to damp all unwanted resonence. The dtiver is 12cm.

www.eclipse-td.com/e34_td712z/index.html

How good are they? They retail for 3000!

Could the design ideas be used to get the very best from a single FR driver in a diy cab?
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Old 23rd August 2005, 04:30 PM   #2
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I wonder if good quality bass is possible with enclosures like that?
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Old 23rd August 2005, 05:39 PM   #3
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Default Explosion

Boom

Here is the unit opened up.
Attached Images
File Type: jpg eclipsejpeg.jpg (60.1 KB, 473 views)
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Old 23rd August 2005, 05:44 PM   #4
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notice the large weight directly behind the driver.

It extends into the pole peice vent. It is tapered at the back, not only to fit the casing but to break up any remaining standing waves that the rear shell did not already kill. So the driver essentially never gets a wave refletion hitting it

The frame with the legs bolts to the front section of the cabinet and secures the DRIVER directly to the stand!
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Old 24th August 2005, 12:47 AM   #5
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It looks like a closed box system to me, don't see any vents used to extend base?
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Old 24th August 2005, 06:02 AM   #6
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spec sheet says
6ohms
83.5dB/W/m
40Hz-20kHz

I hae no idea if the box if vented or not. All I know is that they have made a lot of effort in minimising vibrations, damping the driver and making the hole shebang as dead as possible.

If problems like internal reflections, vibration etc are minimised as much as possible I guess the driver can give its best.

Also having such a small (read no) front cabinet area the driver must be extreemly directional.

40 Hz is pretty low, especially for a 12cm driver in such a small (assumed) sealed enclosure.

Would taking ideas to get the driver as stable as possible make a major difference?

Also these guys follow 'time domain theory'

I dont get it
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Old 24th August 2005, 09:05 AM   #7
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With that kind of effeciency, it might be possible with a full range driver.
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Old 24th August 2005, 09:21 AM   #8
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I was thinking of a W3-871S to start with.
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Old 24th August 2005, 10:47 AM   #9
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That's a lot smaller than 12cm.
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Old 24th August 2005, 11:44 AM   #10
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I was going to try to implement some of the ideas in a smaller and cheaper speaker and then try it with something bigger.

Do you have any other ideas for drivers?

I was thinking about a translam cabinet to make the shaping easier using glass fibre on the inside and outside to make it stiffer. I will try to get a friend who has a lathe to turn a hunk of something he has laying around for the rear weight/phase thingy!

How does that sound?
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