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Class D Switching Power Amplifiers and Power D/A conversion

Anaview AMS1000-2600 project
Anaview AMS1000-2600 project
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Old 31st December 2017, 12:43 PM   #71
daddy dj is offline daddy dj  United Kingdom
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Thanks for the replies
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Old 31st December 2017, 10:46 PM   #72
Bernie7 is offline Bernie7  Singapore
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Hi Chris

Sorry for the late reply, have not checked this thread in a while.

No I have not used DC protection and until now so far so good. This is not to say that the amp has built in protection as I don't recall it ever shutting down over some issue.

Was concerned as I've been playing with a variety of diy input buffers to match the amp with my LDR volume control. I measure DC offset of each new buffer before using to be safe. I prefer my buffers to be DC coupled

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Originally Posted by fishball79 View Post
Hey Bernie, did you end up using DC protection?

I've used this module over the past year with speakers ranging from 85db to 112db without any issues.

Last edited by Bernie7; 31st December 2017 at 10:51 PM.
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Old 7th January 2018, 11:27 AM   #73
pos is offline pos  Europe
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Hello Bernie7,
So what is you recommendation for an input buffer, with unity gain and low residual noise?
Any ready-made module that could be used for DIY-challenged people?
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Old 8th January 2018, 10:57 AM   #74
Bernie7 is offline Bernie7  Singapore
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Of the unity gain buffers I've tried in my system, the standout was the Kuartlotron. It was as transparent and quiet as I could want. It's DIY, there's a big thread on this forum. The kit may be available still and it's cheap for what it does. Get someone competent to build it for you as close to 0V DC offset depends on transistor matching. Output impedance of this buffer is just a few ohms, more than a match for the Anaview amp.

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Originally Posted by pos View Post
Hello Bernie7,
So what is you recommendation for an input buffer, with unity gain and low residual noise?
Any ready-made module that could be used for DIY-challenged people?
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Old 8th January 2018, 11:13 AM   #75
pos is offline pos  Europe
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Thank you!
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