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Old 10th December 2019, 02:32 PM   #111
AnthonyA is offline AnthonyA
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Tried the darlington...

Slightly rounded top end darkish less Airy . Better bass and low. More meat. Less clean.

It can be a benifit in some system.. Can live with both.... I gave it to my friend so.. It's just roughly....the impressions. He is using mox as well so...

I will do mine once I finish 2 projects on hand.

Great choice as well Fab. Still maintain the key feature of usspa.
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Old 11th December 2019, 01:58 AM   #112
fab is offline fab  Canada
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USSPA Build thread
Thanks AnthonyA for the report on the USSPA2 version. How long was the break-in?
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Old 11th December 2019, 02:42 AM   #113
AnthonyA is offline AnthonyA
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2 weeks sir
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Old 11th December 2019, 04:05 AM   #114
AnthonyA is offline AnthonyA
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I would try change the input 220p to something lower 47 to 120p
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Old 13th December 2019, 04:19 AM   #115
meanie is offline meanie  Singapore
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Quote:
Originally Posted by AnthonyA View Post
I would try change the input 220p to something lower 47 to 120p
Hi Anthony, please enlighten me, what does this cap value changes do ?
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Old 13th December 2019, 09:43 AM   #116
AnthonyA is offline AnthonyA
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Normally... Papa Nelson pass does not put this filter.

But it can cause hum, irritating ringing or too bright sounding without it

Can do with slightly smaller value sound will open up{treble and image} . 47 to 120 p is general value. Tweak to taste.
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Old 29th December 2019, 04:41 AM   #117
AnthonyA is offline AnthonyA
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20191229_113158.jpg

Usspa 2
Black looks pretty.
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Old 29th December 2019, 11:39 PM   #118
brianco is offline brianco  Ireland
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Anyone tried battery power?

Any comments?
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Old 31st December 2019, 03:31 PM   #119
fab is offline fab  Canada
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USSPA Build thread
Hi Anthony
If I understand correctly this will be your second USSPA2 build?

Hi Brianco
I have never tried but also curious if sound improvements can be heard from battery psu compared to very good low noise linear regulators with supply source from mains..

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Old 31st December 2019, 07:14 PM   #120
brianco is offline brianco  Ireland
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@Fab...
The reason is that I have plenty of suitable batteries (12v and 6V) whereas it will take a while to get the PS boards which I had chosen....it will probely be a month or two before they are made. I will try it at both 12-0-12VDC and also at 16-0-16Vdc and report, but first I have to get cured of a very bad gout attack in my left hand and both feet....all on top of food poisoning which kept me in bed for 7 days! Not been the best Christmas, but Hey, it is almost 2020, so best wishes to all for the New Year.
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