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Old 13th December 2010, 10:39 PM   #51
Blues is offline Blues  United States
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I'm sorry but I did point out differences already...
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Old 13th December 2010, 10:52 PM   #52
markusA is offline markusA  Sweden
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So far I've only seen subjective listening impressions?
I'm happy you like your build but I'm talking about the circuitry.
It's just me being curious.
I like to understand why something is supposed to be better.
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Old 14th December 2010, 02:19 AM   #53
Blues is offline Blues  United States
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Quote:
Originally Posted by markusA View Post
...but I'm talking about the circuitry.
It's just me being curious.
I like to understand why something is supposed to be better.
At this time there are 2 ways you can satisfy your curiousity -get a kit and build it or wait for the early birds to complete their kits and hear from them.

You sound like you didn't really read the postings and the article...? Please don't hold your breath about the circuit.
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Old 14th December 2010, 03:15 AM   #54
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Blues, does your circuit work well with a wide variety of input impedance amps? Does it have a buffer stage?
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Old 14th December 2010, 05:18 AM   #55
Blues is offline Blues  United States
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Badge, the attachment on post #38 lets you play with the various variables and see how it fits in a system. Music peaks measured from my amp's output at 3.5Vrms (~5Vpk) is already very loud on my 88dB loudspeakers. Keeping that peak value in mind try your system's parameters and see where the volume level knob will be.

As an example a standard CD out of 2.83Vpk, 200R output impedance; an F5 amp with 100k input impedance, 5 gain; and 85dB loudspeakers...3.5Vrms will be at 12:00.

Changing the amp's input impedance to 10k will need it to go past 12:00. Of course all these are approximation and guide. There are a lot of possible permutations it's tough to cover all in reality.

It doesn't have a buffer...
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Last edited by Blues; 14th December 2010 at 05:24 AM. Reason: :)
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Old 14th December 2010, 05:41 AM   #56
markusA is offline markusA  Sweden
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I already have a balanced version with current sources, don't really need another one, especially since I probably won't even be needing the first one.
I was just being curious, sorry to have bothered you.
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Old 20th December 2010, 05:54 AM   #57
Blues is offline Blues  United States
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I have re-formatted the article "FTL -Fiction or Fact?" to a pdf with better pictures resolution. It is however too large now to attach here even zipped (over 1.2MB) so anyone who wants a fresh copy please email me via this forum...

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Old 24th December 2010, 06:25 PM   #58
Blues is offline Blues  United States
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Just an update...Warpspeed Optocoupler Volume Control Kit

Merry Christmas to all!
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Old 28th December 2010, 02:31 AM   #59
Blues is offline Blues  United States
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I picked up several genre of music from my local library and found the albums amazingly enjoyable in every musical sense...even Bela Fleck's banjo playing! Here are the selections:

Love's Been Rough On Me -Etta James
The Great American Songbook Vol. II -Rod Stewart
A Wonderful World -Tony Bennett and k.d. lang
Perpetual Motion -Bela Fleck
John Williams Conducts John Williams' Star Wars Trilogy -with The Skywalker Ranch Symphony
Appalachian Spring/Billy The Kid -Aaron Copland/Boston Symphony; Eugene Ormandy/Philadelphia Orchestra; Arthur Fiedler/Boston Pops Orchestra
Copland Symphony No. 3 -Eduardo Mata/Dallas Symphony

In my experience, a system that does well with orchestral music does well with all types of music. I went thru every track in each cd...with the "Star Wars-Main Theme" even getting repeated twice in one sitting!

With the cold temps I can play all day my Class A amps without the bonus of ear fatigue
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Old 31st December 2010, 02:15 AM   #60
Blues is offline Blues  United States
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John Williams and the musicians let their hair down on "The Cantina Band" track...with a dose of George Lucas sound effects...very nice!

Tympani was reasonably palpable(didn't think my 5 1/2" woofers would be convincing but it did very well including the shimmer) and the triangle was crystalline.

Going back the Bela Fleck album...it is expert banjo playing of classical standards from Bach, Beethoven, Brahms, Chopin, Debussy, Paganini, Scarlatti, and Tchaikovsky with a nice helping of Bluegrass. It is a finely crafted record...with violin, cello, bass, piano, guitars, mandolin, and marimba(!).

The voices of Etta James, Tony Bennett, kd lang were beautifully recorded. Surprisingly enjoyable also is the raspy Rod Stewart who came out smooth and mellow singing jazz standards.
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