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beun
Joined: 28 Jun 2006
Posts: 676
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| Posted: Thu Jun 04, 2009 4:01 pm Post subject: Crescendo Systems at Dallas Lone Star Audio Fest |
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All,
I will be exhibiting my audio products at the Lone Star Audio Fest in the Dallas Park Central Embassy suites, from June 19th to June 21st. This is the link to the Audio Fest website:
http://www.lonestaraudiofest.com/
I will try to post some pictures of my setup soon but I am still rebuilding the electrostatic speakers. These are the Crescendo products I will be showing
Electrostatic speakers
PHA1 phono amplifier
BM51 bass management system
Solo power amplifier (60W Dynamic class A)
DPA1 Digital amplifier (150W switching amplifier)
Kim
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ESL-0.5 Full Range Electrostatic Loudspeakers | RTC2200 Component to VGA Converter with Gamma Boost
Last edited by beun on Sun Jun 07, 2009 9:36 pm; edited 1 time in total
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beun
Joined: 28 Jun 2006
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beun
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kal
Forum Administrator
Joined: 06 Mar 2006
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Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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beun
Joined: 28 Jun 2006
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| Posted: Mon Jun 08, 2009 1:33 am Post subject: |
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Those are self built "full range" (for an electrostat that is) electrostatic speakers. These are 1m wide and 2m high (3'3" by 6'6").
I actually first built these in the late 80's with obviously the Martin-Logans as example in mind. Just recently I took them completely apart, had the stators sand-blasted and powder coated and I am now putting them back together. I still have a few tweaks to make, but so far it is looking good.
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ESL-0.5 Full Range Electrostatic Loudspeakers | RTC2200 Component to VGA Converter with Gamma Boost
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Tom.W
Joined: 09 Mar 2006
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| Posted: Mon Jun 08, 2009 1:48 am Post subject: |
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Kim what kind of heat sinks are you using on the 60 watt class A amps ?
Also are they Mosfet amps ?
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Tom.W
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beun
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Tom.W
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beun
Joined: 28 Jun 2006
Posts: 676
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| Posted: Mon Jun 08, 2009 3:20 am Post subject: |
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Tom,
The Solo does not run full class A, it is a dynamic class A. In a normal class A the full bias current for maximum output power is always present. In a class AB there is much less bias current but at a signal excursion one way the bias current in the other transistors of the push-pull stage actually goes to zero. The dynamic class A of the Solo keeps the minimum bias current in each PMOS/NMOS push-pull pair constant, thereby having the power dissipation advantage of a class AB but the distortion advantage of a class A.
Kim
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ESL-0.5 Full Range Electrostatic Loudspeakers | RTC2200 Component to VGA Converter with Gamma Boost
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beun
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AnalogRocks
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Joined: 08 Mar 2006
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Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sat Jun 20, 2009 2:54 am Post subject: |
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Have a great show Kim!
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CRT.
HD done right!
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beun
Joined: 28 Jun 2006
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beun
Joined: 28 Jun 2006
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| Posted: Thu May 13, 2010 3:18 pm Post subject: |
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So it is now 2010 and I will be at the Lone Star Audio Fest again. It happens this weekend Saturday May 15th again at the Embassy Suites Park Central in Dallas. I will bring a new set of electrostatic speakers with me of a bit more reasonable size, they will only be 2' wide and 5' high. I will try to make pictures tonight.
I will be driving these new puppies with a new 5 channel digital amplifier.
Kim
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ESL-0.5 Full Range Electrostatic Loudspeakers | RTC2200 Component to VGA Converter with Gamma Boost
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Tom.W
Joined: 09 Mar 2006
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| Posted: Thu May 13, 2010 5:25 pm Post subject: |
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Kim any photo of the new amp and what are the specs ?
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beun
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Tom.W
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| Posted: Thu May 13, 2010 5:50 pm Post subject: |
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Kim,
Any reason you chose not to include balanced inputs ?
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beun
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Tom.W
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| Posted: Thu May 13, 2010 8:43 pm Post subject: |
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How about a peek under the hood ? 
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beun
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