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Give me $25K and I'll build you one,I'd even make it with a proper power supply.

£25k gets you a piece of junk such as the piece ended up on Mend it Mark's bench. Prepare to cough up £50k.

Thanks for your feedback.

Thanks. The power supply is CRCRC: qwertyl1.wixsite.com/diyaudio/power-supply

Sorry, but I can't help you with this.

Well spotted! Yes, initially I tried with IO Expanders underneath autoformers board and later I moved them to the controller board. I haven't noticed any difference in terms of sound quality.

@@diyaudioelectronicsprojects Okay, I'm building ~ the same thing as this and was pulling hairs out on this decision. I figured that an io expander would only make noise when I was switching input or volume, in which case it doesn't matter. Why did you choose to switch away from the io expanders? Why did you choose to not switch the input to get some gain?

@@graham8316 My idea was to have everything on the controller board so don't need to touch the autotransformers board in case I want to change something in future. As it is now autotransformers could be controlled even by a mechanical switch. I don't need any gain, already have too much gain in the system.

@@diyaudioelectronicsprojects Nice, you can now use the autoformer board anywhere, very slick.

@@graham8316 Thanks!

Thanks. They are 300mm x 80mm x 38mm

Yes, it sounds really good.

What's the total cost of the build?

@@drpainlesss Over £3k

Thank you for your kind words 🙂 I admire your great videos - constant source of inspiration for me.

Definitely Aleph J. I still have it, F4s are long gone... Maybe because I have never had a good enough preamp for F4.

Thanks. I do not have a suitable equipment to record the sound of my audio system and I don't think listening to it on TH-cam would make much sense anyway. Please have a look at diyaudio.com forum - you could find there a lot of interesting observations. From my side - XA252 is clearly one of the best amps I have ever built.

👍👍👍@@diyaudioelectronicsprojects

Please contact Zen Mod on diyaudio.com forum - he sells kits for this amp.

@@diyaudioelectronicsprojects Thank you.

Thanks. It is 5U 400mm chassis.

At the time I built my loudspeakers there were only Faital 3WCs. Discovery and SBA 3WCs came later...

I bought the crossover kits from Jentzen.

No chance for this soon I am afraid. They are the only pair of speakers I have at the moment and I absolutely love them 😀

@@diyaudioelectronicsprojects Absolutely understandable! I heard them too and really love them!

Nice build. Good choice of speaker. (I almost bought the same kit last year.) Such a classic look. Thanks for the build slideshow. What kind of veneer is that? Cherry?

Thank you! It is a maple veneer @@m.j.s.3838

Thanks. I reused the chassis from my F4 clone if I remember correctly. Aleph J is getting pretty hot, but no issues at all.

@@diyaudioelectronicsprojects thanks for sharing.

No

How many watts do you really need?

Thanks! PSU details: 50VA transformer (2x24V secondary), CRC transformer snubber, rectification and CRCRC filter: 4700uF, 10Ohm, 4700uF, 10Ohm, 10000uF.

www.passdiy.com/store

No, these are the original Audio Note cabinets.

@@diyaudioelectronicsprojects Thanks!

Thanks. It is quite old project. This amp does not exist anymore - it has been "recycled" into Sony VFET and then into M2 clone :-) As far as I remember it sounded very muscular, dynamic, great for rock music.

@@diyaudioelectronicsprojects Very good! I have built the F6 and really like it. I built (onto a test board) the BA-3 preamp but enjoy a BOSOZ, the BA2018 and the Korg Nutube B1 a lot better so I thought I would populate an outboard board for the BA-3 linestage and see if I like it better that way. Thank you for the insight. I have thought of doing the M2 clone or maybe one of Zen Mod's variations of the different amps. He has some neat stuff. Do you know the output of the BA. The XA25 looks especially interesting. I saw your preamp build. It looks like you have two power supplies in the power supply chassis then a regulator in the linestage chassis. Looks interesting. Are you still using the linestage as a preamp?

I highly recommend M2 - it is a great amp. Not the best in terms of transparency or precision, but very organic, rich, exciting and easy to listen to. I haven't built any Zen Mods amps, but I am sure they are very good too. In future I plan to build the one with Tokin VFETs. My BA-3 front end has been sold long time ago. At the time there were power supplies for BA-3, Pearl II and Technics SL-1200 in one chassis. Regulator should be close to the main circuit, so I put it in the same chassis as the line stage.

@@diyaudioelectronicsprojects Pretty cool. I know the M2 is Zen Mod's favorite amp. Here is his altered versions of it if you haven't already seen it: www.diyaudio.com/community/threads/babelfish-m25-r-2-set-amp.371532/ www.diyaudio.com/community/threads/babelfish-m25-aka-m2-on-steroids-aka-m2-xa25-bstrd-aka-m2-gone-berserk.325038/ I will put the M2 on my list of projects to do. This could get out of hand quickly!

Thanks. As you can see it has already got out of hand for me ;-)