Home Theater Forum and Systems banner

21 - 35 of 35 Posts

·
Registered
Joined
·
255 Posts
Discussion Starter #21
Hi,

The shipment of LD25X tweeters will be released from customs early next week and they will be available for order on the 11th. We are still completing the documentation.

Thanks for your patience.

Bob
 

·
Registered
Joined
·
580 Posts
Yeah! What Bob said.

Everything is almost ready. Just hold on.

And take a look at the thread that Bob referenced on his website. That will be one of the forst places these drivers will actually be heard by the public.
 

·
Registered
Joined
·
1,747 Posts
Any chance of a Metal (blasphemy :yikes: !) version of the LD25X if the silk is a success?
 

·
Registered
Joined
·
580 Posts
Not a chance. They ring like little cymbals. Silk doesn't ring.
 

·
Registered
Joined
·
1,747 Posts
Not a chance. They ring like little cymbals. Silk doesn't ring.
I find it kind of interesting how the DIY community seems to have a clear belief that, invariably, "Metal rings" and Silk doesn't introduce any of its own signature. .. and yet... many notable manufacturers seem to use only metal in their speakers.... KEF, Harman, Focal, Genelec, German Maestro, .... Anyways never mind. I don't mean to take this thread off its course. Your sig, however, probably applies to that topic.
 

·
Registered
Joined
·
580 Posts
So after listening to both side by side you prefer metal domes? Then you have a preference. No material is perfect. Even diamond and, beryllium domes have their flaws. Terminating them correctly to a surround can be the biggest problem.

In my experience which is long and wide spread I have heard the odd metal dome that sounds good. I have heard a boat load that catch your ear to begin with. But over an extended listening they tend to be harsh. Metal domes are better at getting extended top end. But they to so many times with cone breakup creating the highest top end.

Coming back on topic, the LD25X really does perform well. It has a very rare level of excursion and exceptionally low distortion. Two things that are mutually required to get loud and clean. A tweeter that will not readily run out of steam. Do a bit of digging on SPL generated by tweeters and the spectral content of music. You will be surprised at how few can actually keep up. This little tweeter is one of the few that can keep up with room to spare.
 

·
Registered
Joined
·
580 Posts
Well Here is a little bit of info on what happened last weekend.

IMG_20120204_163316(1) (Medium).jpg



IMG_20120205_184205 (Medium).jpg



Mark splanation (Medium).jpg

Yep that's me!:yikes:
 

·
Registered
Joined
·
580 Posts
Biamped.

The reason why is that this is a really high efficiency setup. That was the aim in the first place. We clock in at and around 96 db/watt. Pretty much plus or minus 1.5 db from 30 to 20 000 hertz.

The high efficiency gives you output that just has to be experienced to be believed.
 

·
Registered
Joined
·
580 Posts
Series parallel connection. Not that large of a planar. There's larger.
 

·
Registered
Joined
·
1,747 Posts
Any updates / spec sheet? I'm curious how this fares against an aircirc.
 

·
Registered
Joined
·
580 Posts
Bob and I and Dan are all working on the spec sheets. Hold on and they will be out very soon. Remember the release on the ....

Check out Bob's website.
 

·
Registered
Joined
·
580 Posts
Well here is some more info. I did some in living room RTA quickly that show the general response. And I did some careful measurements with the WTpro that give me a low end of the overall response as 94.5 one meter.

See the RTA below. No peaking or EQ of any kind is used. The tweeter is at and around 100 db/watt plus or minus 2 db. The overall response is plus or minus 2.5 db. The vertical scale is 5 db per major division.

VWR BLH February 10th 2012 RTA (Medium).jpg

Not to shabby for a few 5 inch drivers!

And believe me they can really kick butt on this horn. At the DIY Audio Ottawa show at ten feet away we were measuring 110.5 db on a good meter C weighted. I was measuring AC voltage with a meter using a peak hold function. We never topped 10 watts, and the cones never went past 2mm excursion. My point of vantage was right over top the right hand side speaker keeping an eye on the woofers.

What is most beguiling is that you have it all with this setup. As seen in the spec sheet, the distortion on these drivers is astonishingly low. On a horn they have a beautiful match between the low distortion of a horn loading the bass and the clean clear midrange off of the VWR's matched by the smooth high end off of the planar. A better match is hard to put together.
 
21 - 35 of 35 Posts
Top