Your favourite DIY amp?

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#25
Studley said:
@xrk: I get what you say but you still took me by surprise - I thought you would say your Glass Harmony !
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It’s an Aspen commercial design so not DIY. The SuSyLu is similar and more powerful bass and is DIY. However, it’s a very involved and non trivial amp to make given one needs custom wound bifilar chokes and matched Lu1014D JFET SITs.
 
#27
I have only marveled at the FC-100. I’m sure it’s up there as it is a seminal design. It has 23 actives and quite a few of them are very special including 2SK170’s, no longer obtainable 2SC3423’s (maybe replaceable with TTC004’s?) and a bunch of thermal tracking output power BJT’s. I would like to build it one day. But need to build the AurumX first. 🙂
 
#28
My first amplifier was for Guitar where I used Vaccum Tubes built on a scrap chassis. Thereafter I had build few prototype amplifiers using Chips and Discrete Transistors based on schematics of other designers.

Last year I made Circlophone designed by Mr Elvee and found that my quest for a better one is over. I had made two versions of prototype Circlophone using BJT and MOSFET as output devices and found them to be perfect. I have finally made a stereo vrsion of MOSFET Circlophone which is in my continuous use for few months.

The best part of this design is besides very low distortion and wonderful sonic audio quality it never require any adjustment after the assembly. Class of operation is warm AB with 200ma as quescient current.

One must try out this wonderful amplifier.

https://www.diyaudio.com/community/threads/my-little-cheap-circlophone-c.189599/
 
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#30
Dirttracker73 said:
I've only built 8 hi-fi amps, so my experience is pretty minor. I'm not a designer, just built other's designs. My favorite so far is apex AX-14 with dual ops. The amp is super stable, responds just as intended to adjustment of bias and has very low DC offset, single digit mv. The sound is clear and crisp at all frequencies with no drop-off of the low end. Dead silent with no music playing. Just a simple, easy to build amp with great performance. There are other amps with pretty much imprecievable sound differences, but I just like knowing that I can set the bias adjustments and put the cover back on, not worrying about anything.
There are so many good designs that are being shared here that it really comes down to what you want to physically build. There are literally amps with 6 components up to hundreds, or more. Whatever level of complexity you are looking for. And of course, you don't have to build just one.
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Hi,
Did you make prasi PCB and schematic for AX14 dual ops, and what output transistors did you use? Thanks.
Alain.
 
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