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At last: Xin’s Reference is here. Lots of pictures. - Page 2

post #16 of 112
Quote:
Originally Posted by jamato8 View Post
When I designed and worked on my tube preamp it went from 2 to 3 tubes per side then down to 2 then finally one 27 triode per side using an output transformer. The circuit if condensed into a solid state would be very, very simple but it is the right components and sounds better than any preamp I have ever heard. It took over a year to get it right. So, there you go.
I just hope that he actually is done with his design of the Reference, now that he's actually shipping some of them out.
I don't mind waiting at all for my amp if we knew that he is gradually building them and shipping out orders each week, but as we all know, communication is not Xin's forte.

The scary thing is that he may get one of those "Hey, this could use some improvement, let's see what we can do about that!" moments while he is building, and disappear for another X months without any notice.
You never know with Xin.
post #17 of 112
Thread Starter 
Quote:
Originally Posted by tk3 View Post
You never know with Xin.
That pretty much sums up the whole 'Those who waiting Xin amp, post and get your date of arrival !' thread
post #18 of 112
I'm so curious. What opamps are used in this amp?
post #19 of 112
Nice looking (and I am sure sounding) amplifier.
Hope it was well worth the 9 month wait...
post #20 of 112
Thread Starter 
Quote:
Originally Posted by krmathis View Post
Hope it was well worth the 9 month wait...
As all of my babies
post #21 of 112
seems like there some minor changes in the circuitry as well compared to my beta reference:



post #22 of 112
This almost looks like the Dr. Xin went from a four channel to a three channel design unless one chip is on the other side of the board.
post #23 of 112
Thread Starter 
Quote:
Originally Posted by aluren View Post
seems like there some minor changes in the circuitry as well compared to my beta reference:



Even more simple I would say from a layman's point of view.
post #24 of 112
I love the 1/4" phone jack in such a tiny little amp. Would be awesome to have it on my Hornet. Maybe in the future, who knows ...
post #25 of 112
Quote:
Originally Posted by fl00r View Post
As all of my babies
He he
post #26 of 112
Quote:
Originally Posted by slwiser View Post
This almost looks like the Dr. Xin went from a four channel to a three channel design unless one chip is on the other side of the board.
I've never understand what exactly is a 4 ch amp - left, right, ground, voltage divider? Or is it left, right, left ground, right ground?
post #27 of 112
Quote:
Originally Posted by NelsonVandal View Post
I've never understand what exactly is a 4 ch amp - left, right, ground, voltage divider? Or is it left, right, left ground, right ground?
You can read about this on his web site...It still may not be understandable though.

"With my 4-channel technology, not only are the left and right channels separated like the dual-mono structure found in high-end home amps, so are the front and end stages, like the pre-power amps found in top-end home systems. These separations ensure the untouched, cleanest sound possible, even at very large signal swings. This is so far the most effective way to produce the best sound."

This design came out of his and others using two of his amps together one feeding on set of signals into another one. One being the pre-power amp while the second being the power amp. I never did any of this type testing myself but I just have the beta Reference with the 22,000 cap and it is very very good.
post #28 of 112
The unit that uses 4 chips sounds good but the simple design based on the Micro with 3 chips is what he went with. I have a 4, 3, and a deviation of that. There where 3 different caps used and then there are also different bypass caps right at the chips and by the main large capacitor. The last design has a bypass cap near the chip. You want to have it as close as possible to the power supply to the chip. I normally bypass right at the pin.
post #29 of 112
Hmmm... I don't get whats so good about these Xin amps. Why do people continue to buy them when they know they take AGES to arrive? Can they really be that good?
post #30 of 112
Thread Starter 
Quote:
Originally Posted by fraseyboy View Post
Hmmm... I don't get whats so good about these Xin amps. Why do people continue to buy them when they know they take AGES to arrive? Can they really be that good?
Did you ever hear a Xin?
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Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › At last: Xin’s Reference is here. Lots of pictures.