This amp deserves to be made in mono blocs and my first dual mono build successfully completed today after a wait of almost an year with the cabinet making from a friend.
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Beautiful work manniraj!!! These will play nice music for many years to come!
Enjoy them!!
Do
Enjoy them!!
Do
Manniraj,
Excellent work - congratulations!
And that's a nice set up you have. What speakers will you be driving?
Excellent work - congratulations!
And that's a nice set up you have. What speakers will you be driving?
Very nice implementation manniraj !
I like your power switch🙂
Thank you for posting it has worth the while😉
Keep up posted on your listening impressions.
The rest of your system looks also quite nice too.
Fab
I like your power switch🙂
Thank you for posting it has worth the while😉
Keep up posted on your listening impressions.
The rest of your system looks also quite nice too.
Fab
Thanks Do, they do play outstandingly well in the setup now.
Thanks zman01, and I am playing them with my Troels TQWT MKII speakers 🙂
Thanks Fab, its a nice cute power led switch - 19mm 22mm led metal rotary push button brass latching 2 3 position Switch Press Button rotary 2NO 2NC Rotate button rotation|Switches| - AliExpress
First thing is to replace the small EI cheap core transformer (powering the speaker protection module of 12vac) with a good quality RCORE on the back panel above the iEC socket as this one makes a slight humming noise when I put the ear very close to the cabinet 🙂 But does not effect the sound though. I had kept the amp aside waiting for the mono bloc chassis to arrive and now listening to this with my around 2-3 months old Troels and the combo is just awesome with no words to describe.
The rest of the system being Soekris R-2R / AD1862 dacs + Korg Nutube (LDR controller + Emerald RJM Phonostage) and paired with Raspberry Pi3 as Roon transport / Raspberry pi zero over Volumio - Hifiberry Digipro coaxial to Soekris). Every item is DIY including cables and totally worth and satisfied with the effort over many years now. Thanks again Fab for giving us the best amp and fabulous build guide. I still have another matched pair of 2SK2013/313 for a future amp of yours 😉
Well done Manniraj!
Two mono amps is the way to go. My amp weighs 25 kg and is too hard to move around.
Two mono amps is the way to go. My amp weighs 25 kg and is too hard to move around.
Thanks Harry, I guess mine is around 10-15kgs appx and now the heat is manageable compared to a single cabinet earlier.
manniraj, your amps look great! I personally do not like the high-end Mundorf caps (any cheap MKP will be better), but otherwise you're golden!
Thanks, initially tried with WIMA MKS and then I guess MKP 4.7uf but ended up now using a Mundorf 4.7uf. Wanted to try a Alumina Z cap but expensive to get to India. Any other MKP you would suggest as some of the users have used some vintage ones here and happy but getting any good ones in India is becoming difficult now a days with the COVID and no travel.
Thank you manniraj for the kind words and the power switch info.
You have 95dB Troels speakers but I have 87dB Troels speakers so you should have plenty of decibels with 25Wrms 😉
Fab
Oh yes definitely a bit of volume is what makes my Troels to sweat with this amp 🙂
I would definitely want to try different input caps 4.7uf / 3.3uf / 2.2uf just to get the flavour or improve even better. Used WIMA MKS 4.7uf did not like that much and now the Mundorf 4.7uf. Have not given a try with MKP of WIMA though, let me see if I can find it locally either element14 or rsdelivers sites.
Real nice USSA5 Mono’s Manniraj!
Now kick back and enjoy them.
Thanks Vunce, and your advice/support on the AD1862 build really helped a lot in bringing out one of the best DAC builds and has inspired around 10 of my friends in trying to make the dac 🙂
The dac pairs very well with this amp and the Troels and its just magic when I hear the combo.
The MKP in the bom is not so bad. I have tried this one also not so expensive and found a little improvement:
https://www.mouser.ca/ProductDetail/Nichicon/QAP2E335KRP?qs=VOMQJJE%2BBNnafcpXkWrOTw==
However, when you compare caps for sound ensure to listen to them for at least 20 hours or more before concluding.😉
Fab
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Sure Fab, I have tried the Mundorf 4.7uf for more than 40 hrs I guess. Will definitely try this 3.3uf film Polypropylene cap. And also using silver quoted thick cables for speaker out I guess is making a difference in the sound unlike my other amp builds. I used Canare interconnect cables for input side and thick silver/tin plated speaker wire for the output side both for the signal and grounds. Will change to my regular copper 22awg and check the sound signature 🙂
Thanks again.
Wow that will definitely sing manniraj
Output cable .. don't use anything silver
I got very good results with mogami or canare speaker cable ,
Canare takes quite a bit to burn .but very nice for acoustic . Just use pro cables for internal speakers wiring...best saturation and balance .
My friend use that same mundorf ..it's very good for vocal and natural .so it works
Output cable .. don't use anything silver
I got very good results with mogami or canare speaker cable ,
Canare takes quite a bit to burn .but very nice for acoustic . Just use pro cables for internal speakers wiring...best saturation and balance .
My friend use that same mundorf ..it's very good for vocal and natural .so it works
Thanks Anthony, yes the Mundorf using since last 6 months or so and now with mono blocs the amp is up and running. Will change the internal output wirings to some pure copper ones (amazon basics is what I have to try it out) instead of the silver/tin plated ones. I use mogami 3103 for my speaker cables with banana plugs since many years now and now even with Troels as well.