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DNA Stratus 2A3 amplifier - first impressions - Page 78

post #1156 of 2043
Donald Duck blue! Too funny! I'll never look at it the same way.
post #1157 of 2043
Quote:
Originally Posted by Eee Pee View Post

Donald Duck blue! Too funny! I'll never look at it the same way.

 

+1

post #1158 of 2043
Quote:
Originally Posted by Radio_head View Post
 

No.  Definitely on my list though.  Lately I've been stalking Donald's old posts on the SET asylum and it has renewed my desire to hear some uber-expensive audio note UK amps as well as Donald's own 2A3 amp.  And then maybe try the Sequence and its ridiculous crossover.  And get matching blue 2A3 speaker monoblocks.  And then paint my listening room in the same shade. 

 

By the way guys, I know we got high falutin in the color discussions before with Kandinsky and Bugatti, but I think there's a much simpler explanation for the blue and I can't believe I didn't see it before.

 

 It's Donald blue:

 

 

Thanks, Donald Duck looks as handsome as ever! :beyersmile:

 

Yes, I highly recommend auditioning some Audio Note UK amplifiers - 2A3s with big silver-wound, nickel double C-cored output transformers are an ear-opening experience for anyone seeking an end-game system. If you're ever in LA, you're welcome to come hear the Sequences.

post #1159 of 2043

I'm sure Mr. North is delighted by the progression from smurf blue > bugatti blue > Donald Duck Blue. 

Bugatti was the killer comparison and perfect for marketing. 

post #1160 of 2043

..but the Donald Duck Blue made me laugh! 

 

.

post #1161 of 2043

Bugatti and Donald Duck are both classics in their own right. :D

post #1162 of 2043

And the Saab Sonett.

 

Connection...

 

 

post #1163 of 2043
Quote:
Originally Posted by Surfski View Post
 

I'm sure Mr. North is delighted by the progression from smurf blue > bugatti blue > Donald Duck Blue.

Bugatti was the killer comparison and perfect for marketing.

 

 

Perhaps because his name is...Donald? :confused:

 

-Daniel

post #1164 of 2043

Wow. Saab Sonett. I've unwittingly wandered into a really esoteric crowd. I'm humbled once again. 

 

Say, since the HD800 comments are clearly a love fest, what about the Beyer t1? I now own both but in a 12 step program to overcome my focus on technical excellence in favor of fun. It's a long road. 

post #1165 of 2043
Quote:
Say, since the HD800 comments are clearly a love fest, what about the Beyer t1?

 

As I've mentioned in this thread before, I really love my T1's with my Stratus. I'm especially liking it with a vintage 5U4GB and EML mesh plates. Fast, musical, and great bass.

post #1166 of 2043

I've spotted a couple of very short references to the KR Audio 2A3's in this thread, but if someone that has heard them could expand on how they sounded, I would appreciate it.  Although I don't have my Stratus yet (I think I'm next in line :)!), I have a chance to pick up a pair of very lightly used KR 2A3's at an attractive price and so I welcome any input.

 

I've only found a couple of reviews of the KR 2A3 (of course used in other amps); one review used the term "creamy" over and over again.....I'm not sure what to make of that.

 

Thanks!

 

Randy

post #1167 of 2043
Quote:
Originally Posted by santacore View Post

As I've mentioned in this thread before, I really love my T1's with my Stratus. I'm especially liking it with a vintage 5U4GB and EML mesh plates. Fast, musical, and great bass.

My favorite headphone!
post #1168 of 2043

I'm confused by the terms "balanced", "balanced drive" and "balanced" headphones. I understand what balanced means with reference to the connection between a DAC and Preamp with respect to speakers.  But speaker amps don't have balanced inputs?  So how does this work with headphones? An how is that a headphone amp that does not have balanced inputs can drive balanced headphones?  Is it for the same reason that speaker amps don't have balanced inputs?  OK, if so, then what does it mean when a mfr. says their headphone amp has "balanced drive"?  Or, are all amplifiers by design "balanced drive"?

 

Dazed and Confused.

post #1169 of 2043
Quote:
Originally Posted by Frihed89 View Post
 

I'm confused by the terms "balanced", "balanced drive" and "balanced" headphones. I understand what balanced means with reference to the connection between a DAC and Preamp with respect to speakers.  But speaker amps don't have balanced inputs?  So how does this work with headphones? An how is that a headphone amp that does not have balanced inputs can drive balanced headphones?  Is it for the same reason that speaker amps don't have balanced inputs?  OK, if so, then what does it mean when a mfr. says their headphone amp has "balanced drive"?  Or, are all amplifiers by design "balanced drive"?

 

Dazed and Confused.

 

There is a lot of confusion and misuse of "balanced". Balanced means equal impedance to ground for the + and - signal. Balanced interfaces provide a high impedance to common mode noise. Balanced interfaces are beneficial for long cable runs, particularly useful in recording environments like microphone and mic preamp feeds. Balanced can also reduce the potential for ground loops between components. There can be and exist single-ended, differential, and push-push headphone and speaker amplifiers (tube and transistor) with balanced inputs. Likewise, all three topologies when used as a preamp can have balanced inputs and outputs. A single ended amplifier (be it solid state or tube) runs in class A and the active devices amplify the entire music waveform, both the + and - portions. Push pull amplifiers divide the task and dedicate one set for the + waveform and another for the - and combine at the output. Differential amplifiers have two sets of active devices, each handling the entire waveform, but running opposite phase to one another. A differential amplifier is balanced the entire time, input through output. For a single ended preamp or amplifier to accept a balanced input, it either needs to have dedicated electronic circuitry to accept the balanced, differential input signal and convert it to unbalanced or use an input transformer for the same function of converting the balanced signal to unbalanced. This is how some pro audio tube components work: They're single ended electronically but have input and output transformers to accommodate balanced cables. An output transformer-loaded single-ended amplifier can produce a balanced, differential output by center tapping the output secondary winding. Headphones have 4 wires: + and - for each channel. With traditional 1/4" TRS plugs, the - wires are tied together for a common ground. Some listeners feel there is a benefit by separating the - minus leads and driving them separately to eliminate potential back EMF interaction between the headphone transducers & amplifier. This is similar to the rationale for bi-wiring loudspeakers, separating the feeds for the tweeter and woofer all the way back to the amplifier. The 4 wire, balanced headphones need to be driven by an amplifier which provides a differential, balanced output. Again, this can be from a single ended, push-pull, or differential amplifier.

post #1170 of 2043

I'm sure that unconfused him, Donald. :P

 

-Daniel

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