Hi
Im trying to centralize some information. This is because after maybe 5 years of building fw amps and others, there are still (simple) things that i cant control or fully understand. Im just a musician 😉
So, in this thread im hoping that the simple little big things come to an understanding for those that like me, are dummies in a good sense.
So,
I've built the DIY sony vfet (2 transformer/psu in the same chassis). It's working ok.
I've built the Ba3 pre amp with dual PSU also in the same chassis. It's working ok.
I've built the F5, working ok.
I've built one of the APEX audio amp's. Working ok.
On all of this projects i had some doubts. Regarding fine tuning procedures, cables, ground noise/loop and other things that for some of you, are obvious things to do and because of the money invested here, and high expectations about sound, im afraid of something really obvious missing.
Will attach here some pictures of the amps.
One thing is certain. I have noise. I want to get it out of the amps...if possible.
Have an OB system with MA speakers and eminence.
I thought that going with dual Psu's would solve my noise issues with sensitive speakers
Please, feel free to point everything that you find silly or wrong. I just want to improve.
Thank you for everything
Im trying to centralize some information. This is because after maybe 5 years of building fw amps and others, there are still (simple) things that i cant control or fully understand. Im just a musician 😉
So, in this thread im hoping that the simple little big things come to an understanding for those that like me, are dummies in a good sense.
So,
I've built the DIY sony vfet (2 transformer/psu in the same chassis). It's working ok.
I've built the Ba3 pre amp with dual PSU also in the same chassis. It's working ok.
I've built the F5, working ok.
I've built one of the APEX audio amp's. Working ok.
On all of this projects i had some doubts. Regarding fine tuning procedures, cables, ground noise/loop and other things that for some of you, are obvious things to do and because of the money invested here, and high expectations about sound, im afraid of something really obvious missing.
Will attach here some pictures of the amps.
One thing is certain. I have noise. I want to get it out of the amps...if possible.
Have an OB system with MA speakers and eminence.
I thought that going with dual Psu's would solve my noise issues with sensitive speakers
Please, feel free to point everything that you find silly or wrong. I just want to improve.
Thank you for everything
Every detail makes a difference when you have high sensitivity speakers.
I have a diyAudio Sony VFET amp with a single transformer power supply and it is quiet on my 103dB speakers.
Here is something by diyAudio member Bonsai that is very informative. The practical advice is towards the end of the article:
http://hifisonix.com/wordpress/wp-content/uploads/2019/02/Ground-Loops.pdf
Note that the advice is also applicable to preamps.
Things such as tightly twisting wires is a must with high sensitivity speakers. There are many photos of amplifiers and preamplifiers on diyAudio with wires not twisted. Perhaps they are used with lower sensitivity speakers. Wiring layout and transformer layout is important too.
Everything matters.
I have a diyAudio Sony VFET amp with a single transformer power supply and it is quiet on my 103dB speakers.
Here is something by diyAudio member Bonsai that is very informative. The practical advice is towards the end of the article:
http://hifisonix.com/wordpress/wp-content/uploads/2019/02/Ground-Loops.pdf
Note that the advice is also applicable to preamps.
Things such as tightly twisting wires is a must with high sensitivity speakers. There are many photos of amplifiers and preamplifiers on diyAudio with wires not twisted. Perhaps they are used with lower sensitivity speakers. Wiring layout and transformer layout is important too.
Everything matters.