Budgie
Never looks a gift amp in the jackhole.
- Joined
- Jun 22, 2001
- Posts
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(he did check for offset puppyslugg) The headphone amp IC is IC207 on the main board schematic. It then feeds the schematic in the "headphone detail" schematic. It looks like it would be easy to improve the headphone output to the level of a basic headphone amp that alot of people build called "Cmoy" after the guy who first suggested it over on "Headwise". There are some coupling caps that might be eliminated there also. C290&291. Also some mute transistors and current limiting resistors etc. That can probably goo too. Do the same check for dc on those caps before eliminating them.
http://headwize.com/
Take a look at headwise, in the "library" for a link to the "projects" section for the basic headphone amp using the opa2134 for some ideas.
As I was going to bed last night it pop-ed into my head, that this is a dvd player, and they almost always have switch mode power supply's, and the schematic you have shows a switch mode power supply. That adds a layer of extra caution that must be used as the main input to the power supply is from the 110vac power line. Are you comfortable with the chance of getting a nasty shock?
http://headwize.com/
Take a look at headwise, in the "library" for a link to the "projects" section for the basic headphone amp using the opa2134 for some ideas.
As I was going to bed last night it pop-ed into my head, that this is a dvd player, and they almost always have switch mode power supply's, and the schematic you have shows a switch mode power supply. That adds a layer of extra caution that must be used as the main input to the power supply is from the 110vac power line. Are you comfortable with the chance of getting a nasty shock?