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Multi-Way Conventional loudspeakers with crossovers

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Old 15th August 2010, 05:28 AM   #7181
ScottG is offline ScottG  United States
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Originally Posted by c2cthomas View Post

I'm interested if they actually make their gear there or sub it out to you-know-where.

It almost certainly has to be coming from China.. It's likely however that design and control are US-based.

Speaking of China.. the amps I'd probably choose are NOT from Emotiva (..though they look very good for the money). Rather I'd spend the cash for 4 JungSon Duro's (+ a few good voltage converters with stabilization).
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Old 15th August 2010, 05:42 AM   #7182
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Originally Posted by ScottG View Post
It almost certainly has to be coming from China.. It's likely however that design and control are US-based.

Speaking of China.. the amps I'd probably choose are NOT from Emotiva (..though they look very good for the money). Rather I'd spend the cash for 4 JungSon Duro's (+ a few good voltage converters with stabilization).
I'll know more after I take a look at the plant. Not that being made at one place vs. another has that much merit in today's world - quality of design and construction, parts used, specifications and how they get measured etc. are much more important IMO.

I've built a couple of Steve Dunlap's 50W "Krills" for audio but for HT I would like to go HTPC and some DIY outboard amps (pick your flavor).
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Old 15th August 2010, 08:15 AM   #7183
g3dahl is offline g3dahl  United States
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Okay, got the "ARTA MeasuringBox" finished so now I can do impedance plots with LIMP.
This one is of just the TD15M installed in its ~3 cf sealed enclosure, no crossover:

Click the image to open in full size.

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Old 15th August 2010, 04:25 PM   #7184
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Cool Gary Dahl. I need to build one. Anyway, what are your target filters? ex: LR2 of 4 at 600Hz, active/passive, pre or post amp, or have no real idea yet? With that impedance curve this is going to be a disgustingly easy traditional style crossover. That's a serious motor in there.

Thanks for posting and keep us posted,

Dan
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Old 15th August 2010, 04:35 PM   #7185
Pano is offline Pano  United States
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Impedance never falls below 10 ohms?
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Old 15th August 2010, 04:53 PM   #7186
soongsc is offline soongsc  Taiwan
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I had the same question, the overall impedance curve looks interesting.
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Old 15th August 2010, 05:10 PM   #7187
g3dahl is offline g3dahl  United States
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Originally Posted by panomaniac View Post
Impedance never falls below 10 ohms?
Appears to be the case, although I didn't test below 40 Hz. Looks a lot like AE's results, except the difference in vertical scale, and of course, the location and magnitude of the impedance peak.

Click the image to open in full size.

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Old 15th August 2010, 10:05 PM   #7188
ScottG is offline ScottG  United States
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Is is 1.3 or 1.4? 1.3 will pass through 3D at 1080i, 1.4 will do 1080P. (..something to look at with the various receivers/processors.)
Correction..

It appears that even thought 1.3 can handle 3D, that it won't work with the FHD3D EDID..

HDGURU.Com 3D HDTV and HDMI Explained

In fact I don't think there are *any* HDMI 1.4 *processors* available (..though there are several receivers). Sucks to be an "early adopter".

EDIT: here is one: http://www.avland.co.uk/aasp/onkyo/1...8/prsc5508.asp
and the model "under" it:
http://www.bestbuy.com/site/Onkyo+-+...=1218152460760
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Old 16th August 2010, 12:06 AM   #7189
agent.5 is offline agent.5  United States
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Originally Posted by c2cthomas View Post
but for HT I would like to go HTPC and some DIY outboard amps (pick your flavor).
That's my thinking too. Play 1080p mkv video files, using a Linux HTPC with pro sound card. It is doubtful that HDMI plus all the extra layers of DRM is going to sound better.
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Old 16th August 2010, 02:05 AM   #7190
g3dahl is offline g3dahl  United States
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Originally Posted by dantheman View Post
...what are your target filters? ex: LR2 of 4 at 600Hz, active/passive, pre or post amp, or have no real idea yet?
My plan is to use passive filters for everything except the TD15H. For the TD15M, I expect to end up somewhere in the 600-800 range. I will start with a Zobel, see what it looks like with a 2nd-order filter, and go from there. Lynn has experience with crossover design, so I will be relying on his guidance.

The Radian 745 will require quite a bit of attenuation to match levels with the TD15M. Ultimately, an autoformer will be used for this purpose. I have some Universal Transformer 3619's that should be useful for prototyping. Once we have a good idea of where we will end up, I would like to have David Slagle build some for permanent use.

The ribbon tweeter (Aurum Cantus G3) is a bit of a gamble. I am hoping it has enough sensitivity to keep up with the TD15M. It should have no trouble according to the specs (100 dB/1W, according to the manufacturer, but most of the response curve runs 2-3 dB lower). Users of the Aurum Cantus ribbons have reported their output to run well below spec, however, so I'll just have to see what I get. The TD15M is rated at 97.8 dB/1W. We have already seen its elevated response above 1.5 kHz, so that's probably well above what I will get from the part of the frequency range I will be using.

Ultimately, I don't care what the absolute sensitivity level is; my only concern is getting levels matched between drivers.

Gary Dahl
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