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Simple High Performing Headphone Amp
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Old 16th September 2018, 07:17 PM   #101
xrk971 is offline xrk971  United States
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Simple High Performing Headphone Amp
The QA401 looks like a neat product:
QA401 Audio Analyzer



– QuantAsylum


I am using the Focusrite 2i4, also happens to be red but I think can only take 23vpp on the input so I have to add attenuator for anything above 8Vrms.

Scarlett 2i4 | Focusrite
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Old 18th September 2018, 07:37 AM   #102
DontHertzMe is offline DontHertzMe  South Africa
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It's a really useful tool. Automates a whole bunch of the testing process.
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Old Yesterday, 12:49 AM   #103
Harry3 is offline Harry3  Australia
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Originally Posted by DontHertzMe View Post
So after gathering dust for several weeks, I finally completed my though-hole version of this awesome amp.

Dead quiet, kickass bass and excellent dynamics. DC offset is around 5mV on the left and 7mV on the right - pretty decent.

Thank you TimS and XRK!

Attachment 703710
Hi Donthertzme,
Nice through hole boards. Any chance you can share the PCB lay out!
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Old Yesterday, 01:21 AM   #104
raybuss is offline raybuss  United States
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Quote:
Originally Posted by DontHertzMe View Post
So after gathering dust for several weeks, I finally completed my though-hole version of this awesome amp.

Dead quiet, kickass bass and excellent dynamics. DC offset is around 5mV on the left and 7mV on the right - pretty decent.

Thank you TimS and XRK!

Attachment 703710
Amazing craftsmanship. . .
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Old Yesterday, 06:34 AM   #105
DontHertzMe is offline DontHertzMe  South Africa
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Quote:
Originally Posted by Harry3 View Post
Hi Donthertzme,
Nice through hole boards. Any chance you can share the PCB lay out!
If TimS and XRK are okay with it I'd be happy to post the layout
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Old Yesterday, 02:21 PM   #106
xrk971 is offline xrk971  United States
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It’s a public design so you can post if you want. But if folks want a ready-to-build version that has a low noise PSU already, check out the JPS64 layout over in the GB thread.

Simple High Performance DC Coupled Class A HPA with sub PPM THD

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