Posts tagged with: QLS

QLS QA-660 Modification Plan

It has been quite some time since my last article on this blog. Quite a busy life (but that busy life pays this hobby, anyway). I tried to spend sometime few days ago to disassembly QLS QA-660 and planned some...
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Primrose Audio Customer Toroidal Transformer

Finally they are arrived – two custom toroidal transformer from Primrose Audio (also known as Richard Sumner Technology). This is Canadian based company specialized in manufacturing the toroidal transformer. For regular customer, they use SumR name, while for the audio...
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ASUS Xonar Essence One Meets QLS QA-660

Just to kill the curiosity, I hooked up ASUS Xonar Essence One to my QLS QA-660. Seemed the process didn’t click that easy. Xonar Essence One failed to capture the S/PDIF signal above 44.1 kHz sent by QLS QA-660. I...
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QLS QA-660 Basic Power Supply Modification Plan

QLS QA-660 comes with a standard PCB mount multi-secondaries transformer. This is probably not a bad transformer, but most of the time I would be more comfortable with a separate transformer for some application. We need 12V and 17V. The...
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QLS QA-660 First Listening Test

I’m still waiting for a ‘proper’ DAC, but I think it’s quite interesting to see how this new QLS QA-660 performs against its elder brother, the QLS QA-550. So I power up my old Terratec Aureon FireWire 7.1 in DAC...
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QLS QA-660

It’s been a while since I bought my QLS QA-550. Although I haven’t played much with it, but in overall, I like the quality of the player. Now, the new version has come, the QA-660. One thing to be noted,...
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QLS QA-550 with Terratec Aureon FireWire

It’s been a long time since I bought this QLS QA-550 – a year or two. Unfortunately, I haven’t had enough time to try this. During this lazy Sunday, and as I also have ripped several tracks to WAV format,...
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