WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required. There are many reviews of audio hardware and expert members to help answer your questions.
Click here to have your audio equipment measured for free!
A different power supply definitely improve the THX sound quality according to my experience.
There is no noise heard with the original power supply come with THX.
But the imaging is big and not condensed.
In fact I am also confused to the issue I heard. Since the measurement is inaudible and near perfect.
But I have lend THX to my friend for over a week. And I didn't told him any thoughts about this amp.
It turns out that he has notice the same issue.
The issue persists with and DACs and headpones. And only with THX.
I thought THX is just tuned like this.And everyone just love it.So no one complains.
Until I go power supply change for fun as usual.
I tried a probably poor quility 24v 0.5A LDO for other device.
cost $60 View attachment 21613
(YES I aware 0.5A is low.buy i don't believe THX consume that much
since the machine is no heat coming out )
This improve some image issue.But bass texture was fucked up.
So I figure out the image issue comes from power supply.
I give iFi DC iPurifier2 a shot . View attachment 21617
This stuff is some how expensive.but I am too busy to
DIY stuff recently.And this stuff is full refundable in my
place. View attachment 21615
Finally the sound imaging condensed.just like making the focus right in photo.
But one thing must aware is iFi DC iPurifier2 gets very hot working and even with THX shutdown over night.
Probably 60~70 degrees Celsius.Might need to find transformer with switch to use with this.
Gustard is not clone rather a mimic/mod in my book. A200 is a cheaper clone than af200. They guy who makes af200 also makes fiona3 which is lisa3 clone.
Gustard is not clone rather a mimic/mod in my book. A200 is a cheaper clone than af200. They guy who makes af200 also makes fiona3 which is lisa3 clone.
I don't think there's anything big but there should be. I don't buy into the original being the best stuff. If it measures well then it is. Before i modified o2, a200 and af200 are my recommendations for my friends. So a couple of them bought a200 and happy. af200 is more expensive but i think it's better built, closer matched transistors. So yeah. But it's twice as expensive tho. about 2400 cny.
Amplifiers imho do have sound. But the difference is still rather small comparing to headphones. If you get a pair of great sounding headphones to your liking it will sound good.
The refurbished ones are essentially second handed ones. The seller/builder discontinued the a200 so he bought back some second hands and resell them. Not bad deal especially for the price. And you can swap some opamps for better measurements.
opa827 for input and opa227p for the ones nesr the output transistors.
The refurbished ones are essentially second handed ones. The seller/builder discontinued the a200 so he bought back some second hands and resell them. Not bad deal especially for the price. And you can swap some opamps for better measurements. opa827 for input and opa227p for the ones nesr the output transistors.