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LISA III Available for Order - Page 30

post #436 of 1070
Quote:
Originally Posted by OverlordXenu View Post
Some people hear a jar of pebbles changing the way speakers sound. The most fallible sense is probably hearing...

The best way to demonstrate burn-in taking place, would be some kind of objective measurement, not using someone's ears...
I think we are going off-topic now. Suggest to discuss burn-in as a different topic, but there have been a lot of exchanges in this community now and in the past.

As far as caps are concerned, my understanding is different caps construction involve some different mechanisms of how energy are stored and released, especially along the time axis and frequency band. Many caps involved an electro-chemical process which is far from 0 or 1 by definition. The micro equilibrium dynamics and revisibility of a chemical process is a black hole to me but I am sure there are more knowledge involved in this area.

I guess it will be difficult to measure, real time, what is chemically happening inside a capacitor, especially under transient of high voltage / current swings.

Another thing, before we close this off, is that objective measurement of "audio experience" as perceived by individuals have not made too much progress in the past 20 years to my understanding. For example, how and why certain chain of audio nodes and signals in different arrays and time space will make a certain person feel relaxed, happy, sad, excited, or irritated is still at hypothesis stage. The subject is made more complicated and non-conclusive by other determinants like the intelligence, background, cultural environment of a particular test subject. Objectivity can be a real challenge in this connection.

Yes, we can measure physical parameters like wave forms, voltages, currents, impedance, frequency response, and various transients at nano-level. We can even trace the path of a certain high speed particle in space, but it will be difficult to "relate" this parameters to audio terms.

Not least, no matter what parameters we are measuring on the bench, it is very likely our magical biologicial system does not intercept and interpret things in the same way. Our own decoding system is much more complicated, sophisticated, but less predictable than a oscilloscope

I believe science is constantly advancing and there are things that we cannot fully explain / decode yet. But that does not mean certain events are not taking place.

F. Lo
post #437 of 1070
Quote:
Originally Posted by OverlordXenu View Post
Some people hear a jar of pebbles changing the way speakers sound. The most fallible sense is probably hearing...

The best way to demonstrate burn-in taking place, would be some kind of objective measurement, not using someone's ears...
I did a direct comparison of two same amps a/b'd with my own ears and Yes i heard a Difference. Just because you Tend not to believe does not make it fact. hell if i didn't hear it with my own ears i would not think its truth also..

Click any of my text for the thread i posted...
post #438 of 1070
Quote:
Originally Posted by Musicdiddy View Post
I bought an adaptor from Maplin Electronics in the UK. It's a 24Vdc switched mode regulated with a current of 800ma max.
Quote:
Originally Posted by fkclo View Post
What what you describe, it may be possible that your charge is actually injecting a much higher voltage that the specified 24V, as apparently it is not a regulated power supply. F. Lo

?? What am I missing here
post #439 of 1070
Just trying to look at possible causes of a blown up battery.

Sometimes I feel that "regulated" power supply available on the streets are not really regulated. Also, there may be QC issues involved.

F. Lo
post #440 of 1070
I am not talking about music itself, just audio reproduction, ie. accuracy.

And again, one's ears are not an acceptable benchmark. We need tools that can't think, and decide which one is better. For a good example of the fallicy of ears, watch this. http://youtube.com/watch?v=9gBL-5Sm978

What did you hear?



I know I hear variations of "piplup", "hitler", and "sieg heil", what do you hear?

And remove the blind fold ruins the test. A double blind test means to person "giving out" (for lack of a better word) the test cannot know which amp is which. The best way to do this is via some kind of switch, as it allows for quick switching and AB testing. When I read a report on a blind test, it addressed it's validity saying that a human only remembers (ie. can directly compare the old and new) sound (signature?) for 5 secconds, and what they were testing couldn't necissarily be switched. In this case, I don't think a blindfold really even means much, the people taking the test just can't know which amp is "burned-in," and which one isn't. But the test would lose validity if some knew which was burned in, and which didn't.

A good way to look at stuff like this, is that thread around here somewhere, where someone blind-tested his parents about, I think it was CD players. I think that his mother, not a self-percieved "audiophile," had a high accuracy rate, but the father, who did think he was an "audiophile," said that the ones he felt sounded the best were the most expsenive ones, and I think he was right one or two times. That test somewhat shows that people will make themselves think that the more expensive device is the better one, but that test showed that that's not always true.

Then again, I'm not sure of the "legality" of talking about blind testing, although I think only cable blind tests are banned.

On topic, this amp is great. If I had the money, I'd buy it.
post #441 of 1070
Quote:
Originally Posted by fkclo View Post

Alternatively, I would suggest you go for Phils LLP Power Supply, which is an audiophile grade, laboratory quality, safe power supply designed specifically for the LISA III. Yes, it is not cheap, but this may be what you want if the LISA III is to be used as a desktop amp.

F. Lo
Yes I have sent an email to Brad at Triad enquiring about the power supply - don't know if its available for purchase yet. I have also ordered the adaptor from RS Online that you recommended in a previous post.
I hope I get this resolved one way or the other as the Lisa is too brilliant an amp not to be able to use it.
post #442 of 1070
OH, I just noticed I received this certification stating Production Number: 19 of 100, limited edition. What would be the difference between the limited edition and not limited edition? Just a thought. I don't even get any T-Shirt like with UE11
post #443 of 1070
Quote:
Originally Posted by jlingo View Post
OH, I just noticed I received this certification stating Production Number: 19 of 100, limited edition. What would be the difference between the limited edition and not limited edition? Just a thought. I don't even get any T-Shirt like with UE11
Oh, I just behind of you, 20 of 100. Well, Brad told me that the first lot comes with high bias design, so it would be sound much better. But such "high bias" is not the original plan because this draws too much power, so not suitable for long battery run. Another thing is the front plate, the "Bass" is incorrectly printed as "Base". Just these two differences, and I am glad to have it.
post #444 of 1070
Whats the weight of the lisa III,and any idea why its called LISA ?????
post #445 of 1070
Any more info on Phil PSU for LISA? I don't see many people use them. Any reason why someone would want to get a PSU from Triadaudio that is designed for LISA?

Also anybody use LISA Portable? if so what bag is used? anything from headroom? I have the Expedition brick.
post #446 of 1070
Quote:
Originally Posted by jlingo View Post
Any more info on Phil PSU for LISA? I don't see many people use them. Any reason why someone would want to get a PSU from Triadaudio that is designed for LISA?

Also anybody use LISA Portable? if so what bag is used? anything from headroom? I have the Expedition brick.
The last communication a few days back with Phil was that availability of high quality parts in small quantities in US remain the main hold-back on production of the LLP.

I understand Brad and Phil is still working on the subject. I hope to hear some good news from them in the not too distant future.

F. Lo
post #447 of 1070
Quote:
Originally Posted by ajsaxin View Post
Whats the weight of the lisa III,and any idea why its called LISA ?????
I will try to chime in for the first part of your question. The following are extracted from Phil's post in the TriadAudio forum.

Quote:
"Measuring just 3 inches wide and just over an inch high LISA III Standard Edition is compact and quite portable yet has sound quality that rivals fine Home Amplifiers. The LISA III Expedition Edition has the same footprint of 3 inches wide X 6.3 Inches in depth as the LISA III, However is 1.7 Inches in Hight. The Expedition Replaces the Standard versions 9 volt battery pair with Ultra high capacity (For this application) NI-MH battery with 14.7 Volts @ 2100 MAh." "The LISA III Expedition will weigh in at around 28oz"
So, doing some rough estimation I would think the LISA Standard will be around 14-16 oz - being a smaller case and a lighter batteries. But this is rought guess so take it with a grain of salt.

Regarding the second part of your question, you better ask Phil about that. Actually, LISA is a code name used by Phil in his previous projects as well (the Pocket Reference II was code named LISA II). But as to why "LISA" and not someone else I have no idea.
post #448 of 1070
wow maybe im just being stupid but i got a huge kick out of this. it was on their website.


post #449 of 1070
Quote:
Originally Posted by jlingo View Post
Any more info on Phil PSU for LISA? I don't see many people use them. Any reason why someone would want to get a PSU from Triadaudio that is designed for LISA?

For your information, the design of this PSU is also uncompromising approach, it is as an option for users to use it instead of buying the unknown quality A/C adapter from market. As told, this PSU can eliminate any hum noise we can find in many A/C adapter. I think the quality of this PSU can benefit the performance of LISA III as well, only it would be very expensive.
post #450 of 1070
Just want to add that the LLP is a very high quality power supply which provide linearly regulated, ripple free DC to the LISA. When one plug in an external power supply, it will take over the battery power. If the external PSU provides "dirty DC" the sonic quality suffers as a result. Of course, one can also run the amp on battery for the best result, but if you are like me who will be using the LISA as a desktop amp, the LLP comes in handy. Besides, it will also be able to provide slight more juice than the built-in batteries, and I believe this is only beneficial to what we hear.

F. Lo
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