Themadmilkman,
Why d'u think many audiophiles love to have active preamp v.s. passive?
The answer is due to extra feedback to feed more linear signal onto the amp. |
Pardon my mistake in paragraph 16. Please change it onto AC power-line freequencies.
As to audio freequencies refer to paragraph 17. |
Bomarc,
Your proposed 19- believing is only the derivative. The prime
20. Who and/or what made us to believe.
Ghostrider45,
6dB per bit seems way tooo much for me as it's hard for me to imagine that there is nothing between 30 and 36dB.
I also want to post a general comment that many of the paragraphs mentioned are just only derivatives.
I'm appreciated to all posters whoever agrees or disagrees The only thing I want to add is that I bought for the same as I sell and if someone will realize the same might only benefit.
Thanks for current and future posts as well. |
Tsouthworth,
You basically need to perform a third experiment: Strip the shield of your old MIT wires and try them one or the other direction.
As to the recording onto cassette the pulling strength is different throughout the whole cassette tape length especially at the very beginning and at the very end. Thus the alignement can't be perfect as well even on mega-priced tape decks. What can be great there is electronics making a clean recording and sound.
Open reel recorders are to the less degree affected but still recording engineers wind forward and leave the rest at least 15...20meters unrecorded from both tape ends to make sure that the tape strength will be more stable and so is head alignement. |
Adding to the myth list:
--Shooting a fly with 45 Magnum(you never know if you actually kill it).
A simple plastic slapper will just do enough. |
Tom,
with all due respect to you I can tell that I'm different from the one who would bring "crying towel" and despite your wide thick and big experience selling audio equipment, I have placed a large number of scientific and budget measurements onto every paragraph mentioned, but I don't specify reasons on purpose since they require knowlege of electronics and mentioned negative feedback in particular. I simply let everyone here think about that including dealers as well(that unfortunately in largest scale were "infected" by new-era high-end mythical plug to be able to infect buyers).
Marty,
as you can see I enjoy being "attacked"! |
Jax2,
Lookup at least 50 years back to find out how WE300B is $900/pr now and other mega-prices as well.
You'll certainly be able to subtract from psychological "psycho" thereafter and plenty of bait for different purposes. |
Ghostrider,
Thanks, I'll follow! |
Bob and albert,
it's not a "troll" rather it's laughs or audio-related humor.
It uncovers the reality that Elizabeth's path(as perfect example here) and anyone who follows the same to "perfect sound" had gone too far wrong way with spending too much on "dummy activities".
+ few "trolls" more:
--Audiogon is better than Audio Asylum
--Hobby is when you spend
--Wires make differences on more pricey equipment(deliberately designed to "feel" the wires)
And Yes Bob,
"The Worst Of" is what I realy meant. There I completely agree. |
Following tubegroover:
1. A possibility of creating two or more systems or components by different manufacturer that HAVE same measurements...
2. Ears are far more sencitive than any measuring devices. |
Continue the list:
A GOLDEN EAR TEST.
...for a perfect and sensible ear(s) that able to hear .1dB differences:
1. Eat a bowl of grean pea soup with smoked chops of pork turkey or beef.
2. Play a critical recording you're intended to judge a system performance.
3. Pass some gas during an auditioning(preferably quiet especially for those who has a microphonic tube equipment so you won't interrupt a listening test)...
In result you should hear sonic changes of more than 0.1dB(not realy sure if worse or better) as the air pushed by the speaker has some content of impurities that somewhat change the air dencity and thus vary the room accoustics. |
Sean,
Most of the such recievers are built on OP-Amps that by definition have humangous gain and thus need huge neg. feedback to correct distortions. Most of these chips(used in consumer audio products) are produced in China and do have terrible characteristics far different from catalogue specified. A feedback at the same time can't be infinite and should be carefully selected so such unit will not go to oscillations...
By definition it's far more easier to produce a transistor with clean and linear characteristics(or tube) than OP-amp. A good OP-amp has much larger tolerance in its IO characteristics than a good transistor(or tube) by all logical terms but designing and building an audio component is much simplier and faster and so cheaper using OP-Amps, however there are many successfull audio-components in today's high resolution audio equipment built on OP-Amps: compact phonostages such as NAD PP1, Michell ISO by Tom Evans; preamps such as McCormack RLD, McCormack Micro Line Drive; poweramps such as Audio Research D series have input and driving circuitries using OP-Amps.
Gregm,
To understand measurements that everyone HEARS you should know ALL electronic parameters of at least audio amplification equipment. Challenge yourself and many secrets will be uncovered for you... |
Themadmilkman,
First you need to know what feedback is and than you will easy understand what is negative feedback.
Theoretically and in general, the gain of an amplification device such as transistor tube or OP-Amp is very high and non linear. In order to eliminate a possibility of self-oscillations i.e. instability of such tne negative feedback mandatory should be applied. |
I know well that VK was originally an SS amp designer(as well as Vladimir Lamm or previousley Vladimir Shushurin).
MOSFET as well as Bipolar or OP-Amp do need feedback. The mentioned BAT amp has probably Zero global neg. feedback while having plenty of local one. A local feedback is the one that is being applied to an individual amplification stage of an amplifier. A global feedback is being applied to the amplifier as whole.
When amplier is being designed and tested for distortions the engineer may or maynot need an additional feedback to correct them and this feedback would likely go arround the wole amplifier instead of recalculating and retesting values for every individual stage. Increasing a global negative feedback do decrease the gain and the output power of the amplifier substantially. |
