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AK4490 USB Dac with dsd support.
AK4490 USB Dac with dsd support.
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Old 12th August 2018, 06:17 PM   #1581
Aboe is offline Aboe  Denmark
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Quote:
Originally Posted by sonnya View Post
Attachment 696442

This is How it looks. Only trimming is bias.
And running very stable.

It is set not to break any records. But to be stable. Still it performs very well.
Have just been visiting Sonny, and got a change to hear the new amp - have to order a set after that :-)
It was just a test setup, but it sound really good overall. The most astonishing was the huge picture in the sound - you actually feel the room the musicians play in - very open and detailed. Iím looking forward to receive and build the new amp, and test it with different caps in the psu and internal cables.

Cheers

Anders
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Old 12th August 2018, 07:18 PM   #1582
sonnya is offline sonnya  Denmark
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We have tested and Will ship out 2 sets monday/wednesday.

3 sets more is reserved out of 12 pairs. So there is 7 pairs left.

We only had to change 4 caps that takes care of loop stability. They was set very conservative.

Yes it sounds amazing. I have build a lot of amps but this one is in top 3.
  • Rock stable
  • Easy bias adjustment
  • Pitch black bagground.
  • Goes very deep.
  • No listening fatigue. But still very detailed
  • Speakers are fully protected against DC/mall function of amp
  • Basis idle current is 60mA. Output stage bias is easy to set at as low as 40mA
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Old 12th August 2018, 07:21 PM   #1583
sonnya is offline sonnya  Denmark
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When I say top 3 I mean it.
Tssa V1.8 is pushed out by a good margin. Of course it is more expensive but it has safety build in which is not the case for the tssa V1.8 and if we take this into account, then the difference is not that big any more.
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Old 13th August 2018, 01:14 PM   #1584
sonnya is offline sonnya  Denmark
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People ask for at powersupply for the Amplifier.

The following board in the attached picture gives 110.000uF/50V or 90.000uF/63V for 230Ä.

On the second picture you can see a build up using this powersupply and a 800VA transformer.

Cabling is a bit sluggish.
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File Type: jpg E40CF15F-0AA0-46FD-9391-E2DD32AADA51.jpg (687.4 KB, 63 views)
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