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Sapphire Headphone Amplifier rev. 2.0

Posted 22nd November 2013 at 12:45 AM by rjm (RJM Audio Blog)
Updated 5th January 2014 at 09:17 AM by rjm (update schematic to 20f4)

Update: I've ordered parts for small number of Sapphire 2.0 kits. The normal price will be $125, but as an introductory offer the first batch will be available for $100. Kit includes a set of boards and all the parts for the board. You need to supply the transformers and diodes, as well as a volume control, and the chassis hardware.

Update: boards are in stock, see photo.

Original here, diyaudio thread here.

November. That time of year for finally getting around to advancing some of my audio projects a little.

The Sapphire has remained in "rev 1+" for some time now, partly because of time constraints, partly because of the lack of popularity, and partly because it was already a re-spin of the beta version and worked just fine.

There were a few housekeeping things I wanted to add though, which have been included in the 2.0 revision.

- added a dedicated ground (GND) pad to connect to chassis...
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Attached Files
File Type: asc Sapphire 20.asc (3.0 KB, 296 views)
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