I was always wondering is 3 channel design really superior to 2 channel design? I tried to find topic in head-fi about 2 channel vs 3 channel and although i don't know much about technical subject, i think 2 channel is seem to be better in an objective view. I was wondering why there are only...

I want to try the buffer design in SOHA II with opamp gain stage to make a simple build. With the original buffer, do i need to change anything to make it work with opamp? I'm intend to run it with dual rail +-12V power supply/

"Rank the Headphones that You Own." thread was created for a long time and greatly contributed by everyone so i think it's quite interesting to make another thread but for headphone amps . The rule is simple: only list amps that you own or have extensive time of listening by order from best to...

I'm building a 2 channel PPAv2 in bareboard with something changed from original: - Dual +-12 rail regulated power supply, no voltage divider - Change PN4392 to 2n5486 - 2n5087/2n5088 change to BC327/BC337 - No third channel - both opamp and output transitor are powered by +-12vol I have...

When designing a amplifier PCB is there any rule to make it sound best? Or just make every signal trace as short as possible in one side and another side is full ground plane? I ask this because when i make a point to point o2 in a perfboard (the wiring was very nasty, and there were some very...

I saw this chinese regulator kit and bought it because although i dont understand the schematic, it seem to have high performance. But when i received the kit and read the instruction (translate by google), seem that it can output less than 500ma or  will become too hot. They even suggest to set...

I etched a portable amp pcb, star ground point at common point of two 9v batteries but i route wrong two channel  Then i do another board which i think has better ground (more dedicated ground traces), star ground at one leg of the filter capacitor: But it actually sound worse, the...

The O2 amp using either AC regulated or battery power supply. As my ear and I have read quite a few post claim that there is no different in sound quality between using adapter or battery or maybe more bass punch from adapter because of higher current capability. But as my knowledge, battery is...

As i have read, the Mini3 outperform a regular cmoy because it has ground channel so i have a Grado Ra1 clone which is a cmoy and sounds very good using two 9V battery and real ground. So can i improve the sound of RA1 by adding an active ground channel? 

Hi everyone I have done all necessary mod to the Indeed G2 that was mention in Rockgrotto but i still want find some way to improve it. In this schematic, what is the task of 2n3906? Can i change it to BC556 to get better sound?

I'm plannning on building a CKIII, my previous project is the starving student so now i have to learn to work with transformer. My main curious is i saw many type of transformer but the most popular one are these two: I don't know the first one name but the second is a toroid transformer...

I made a regulated supply for my dac, using the schematic of millet minimax ps To get 9v output, RR1 = 120ohm, RR2 = 681 ohm, RR3 = 1k ohm trimpot, all the rectifier diode are 1n4004, i use a 9v 1000ma ac adapter. My power supply circuit use exactly the millet minimax ps layout...

I was wondering if this kit is good enough and how does it compare to tread or step?     P/s: i don't have the schematic

I want to build a good hybrid amp to drive my T50RP. The parts cost for each of these two amps are very close so i will go with the one with better performance. The size is not a problem, i just want to get best sound for price. I want to build an amp has solid, tight, hard hitting bass, neutral...

It's hard for me to find the original 4.7uf solen for this amp. Can i use this instead of the original capacitor? Will it sound worse?

I have just finished my first cmoy and it sound wonderful, more than i expected . Now i want to increase its performance by using better power supply. I'm interested in sijosae discrete rail splitter but i don't know what's the different between these schematics? Which one is better?    ...