diyAudio - Blog Entries
Go Back   Home > Forums > Blogs
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Old

Sapphire 4 headphone amplifier [Rev. 4.1m]

Posted Today at 01:02 AM by rjm (RJM Audio Blog)
Updated Today at 06:17 AM by rjm

[in progress]

Development thread starts here.

While I consider this my best work to date, the documentation trail has become hopelessly scattered and I don't have a write-up on my web page yet, so for the moment let me try to regroup in this blog post and make some sort of gateway/portal to the project.

The followup to the Sapphire 3 started out as a generic musing on stacked diamond buffers and current mirror amplification, coalesced for a bit as the ill-fated Project Unity before becoming part of the Sapphire line initially as a temporary measure, just something I could quickly get up and running in my existing Sapphire chassis. The first iteration kept the open loop buffer of previous Sapphire iterations, but now I'm running the 4.1m boards closed loop I've ended up at just the classic, dictionary definition current feedback amplifier. So be it. It sounds great.

*****

The 4.1m boards feature the option of closed loop...
Attached Thumbnails
Click image for larger version

Name:	pcb-sapphire-41m-brd.png
Views:	3
Size:	20.9 KB
ID:	2360   Click image for larger version

Name:	sapphire-41m.png
Views:	4
Size:	198.3 KB
ID:	2361   Click image for larger version

Name:	pcb-sapphire-41m-sch.png
Views:	8
Size:	20.4 KB
ID:	2362   Click image for larger version

Name:	DSC_1165s.jpg
Views:	5
Size:	203.3 KB
ID:	2363   Click image for larger version

Name:	DSC_1172s.jpg
Views:	4
Size:	386.5 KB
ID:	2364  

Attached Files
File Type: zip pcb-sapphire-41m2-bom.zip (196.2 KB, 2 views)
rjm's Avatar
rjm
diyAudio Member
Views 17 Comments 0 rjm is offline
Hide this!Advertise here!

New To Site? Need Help?

All times are GMT. The time now is 11:37 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki