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Old 10th December 2019, 08:30 PM   #441
nikosokey is offline nikosokey  Greece
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Originally Posted by meanie View Post
The plus point is it performs so well at a low volume too, sometimes you just want some soothing music when working thru the quiet nights without disturbing the other family members.
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Old 10th December 2019, 09:12 PM   #442
pinnocchio is offline pinnocchio  Canada
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Originally Posted by fab View Post
USSA5B is new and really my own appreciation does not mean much. All I can really say right now after less than 2 hours of comparison is that both my friend and I found the 5B needed higher volume to open up its soundstage compared to the USSA5 that kept its soundstage even at very low volume. But the 5B kept its good bass even at low volume. The 5B appears more forgiving for bad recordings too but does it mean less resolution or not? But this is only perception based on limited trials.
I'm the guilty one who listened with Fab..! Hehe

I can attest to his listening observations/impressions. At lower volume the bass is consistent to higher power levels. The mids and the highs on the other hand, at lower volume become a little shy (soundstage is narrower) but this all changes when listening at moderate levels. Soundstage really opens up and most of the regular USSA5 qualities shows up. Soundstage is a tiny bit narrower than USSA5 but is a tiny bit deeper, it's a very good experience. So for those who always listen at moderate to high volume, this is perfect! As Fab said, if you were to build your first USSA5 and you can get all the parts for it, this is the one I would choose, original USSA5, on the other hand, the 5B is a very good alternative if sourcing parts and/or cost is a factor, it's also interesting for a second USSA5 if you want to have amplifier selection.

Go ahead, build with confidence, you won't be disappointing whichever version you build.

Do
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DACs : Mirand AK4490 + Discrete Output | Ian Dual ES9038K2M | Speakers : Troels Gravesen ATS-4 | Sagwee LT V3 |
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Old 10th December 2019, 09:25 PM   #443
Vunce is online now Vunce  United States
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USSA-5 PCB GB
Hi Do,
I knew those speakers looked familiar, hehe
Very helpful description of the 5B. I will give the 5.1 a spin against my 5 when time allows.

Be well!

Cheers,
Vunce
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Old 10th December 2019, 09:30 PM   #444
pinnocchio is offline pinnocchio  Canada
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The USSA5 is the amplifier I always go back to, my favorite amplifier to date!

I wish I could build another pair of speakers from Troels.. I'd love to try the new CNO-GRANDE
CNO-GRANDE

Paper cone drivers are to my ears, the best for rendering string instruments.

All the best!
Do
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PREAMPs : AMB α10 + USSPA | LDR3x + USSPA | AMPs: AMB β24 | USSA5 | TGM8 | VZ Audio NS OPS | FC-100 | Modulus-686 |
DACs : Mirand AK4490 + Discrete Output | Ian Dual ES9038K2M | Speakers : Troels Gravesen ATS-4 | Sagwee LT V3 |
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Old 10th December 2019, 10:04 PM   #445
Vunce is online now Vunce  United States
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Wow!
The CNO-GRANDE speakers look amazing, I will bookmark them. Maybe one day I will be able to pair them with my USSA5

Thanks

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Old 11th December 2019, 03:29 PM   #446
mbrennwa is offline mbrennwa  Switzerland
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Quote:
Originally Posted by pinnocchio View Post
I'd love to try the new CNO-GRANDE
CNO-GRANDE
Bass nearfield is absolut 91 dB / 2.83V re. 1m. Converting this to free field, you end up with an efficiency of approx. 85 dB / 2.83V / 1m. Is this enough for the USSA5?
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Old 11th December 2019, 04:59 PM   #447
pinnocchio is offline pinnocchio  Canada
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Yes, not to worry. We’ve driven very inefficient speakers with this amplifier without any issues. It feels so much more powerful than it is. I have a set of Troels ATS-4 and you wouldn’t believe how loud the USSA5 can drive them, quite remarkable!

Do
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PREAMPs : AMB α10 + USSPA | LDR3x + USSPA | AMPs: AMB β24 | USSA5 | TGM8 | VZ Audio NS OPS | FC-100 | Modulus-686 |
DACs : Mirand AK4490 + Discrete Output | Ian Dual ES9038K2M | Speakers : Troels Gravesen ATS-4 | Sagwee LT V3 |
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Old 11th December 2019, 07:10 PM   #448
gaborbela is offline gaborbela  Canada
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Quote:
Originally Posted by fab View Post
Hi Gaborbela
No I have not tried that. My goal with the USSA5.1 and 5B is to get rid of these too hard to find good audio mosfet drivers. This way peoples will not be able to say “using unobtainable parts...”. I am building the second channel board of the USSA5.1 so eventually I will be able to try it in my system and then maybe compare with an original USSA5. In the mean time, maybe meanie, Vunce or another member will build his 5B....

Fab
Sorry Fab, after I realized it required more tweak to install the power BJT as a replacement for the MOSFET not one on one swap and very likely need extra work to switch between the Darlington driver and the MOSFET drivers.
Also, you did these so people can build the amp. Thank you for your answer.
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Old 11th December 2019, 10:35 PM   #449
tomtest is offline tomtest  Germany
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Quote:
Originally Posted by pinnocchio View Post
The USSA5 is the amplifier I always go back to, my favorite amplifier to date!

I wish I could build another pair of speakers from Troels.. I'd love to try the new CNO-GRANDE
CNO-GRANDE

Paper cone drivers are to my ears, the best for rendering string instruments.

All the best!
Do
Hi Do,

That was not fair, I thought you were a nice guy!
Until now the world was still in order, no great wishes, only the current projects to complete (housing) or improve the power supplies. Gambling with parts here and there and than YOU came throw in a name of speakers,
I am curious as always, put at short glimpse at the website and bang the world is destroyed!

Now I am dreaming about these speakers, looking if the will fit into the room, how long it will takes to save the money for it and how to tell my wife!

As usual you have a good and expensive taste!

Please do NOT tell us more about it (e.g if you have heard them by your own and how it was, ....)!

Nevertheless I wish you a nice evening.
André
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Old 12th December 2019, 02:29 AM   #450
meanie is offline meanie  Singapore
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Received the pcbs. They look stunning in Black and Gold format.

Thanks, Fab!
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