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how can i improve this headphone amp
how can i improve this headphone amp
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Old 29th March 2011, 08:01 AM   #1
bluegrass is offline bluegrass  United Kingdom
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Join Date: Mar 2011
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Default how can i improve this headphone amp

I have a Rolls HA43 headphone amp which is simple and cheap. Looking inside, it would seem simple to improve a few components/opamps. Has anyone got any tips on what to swap out? I include a link to the circuit diagram

www.rolls.com/pdf/M_HA43.pdf

...Thanks for any help
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Old 29th March 2011, 01:46 PM   #2
bluegrass is offline bluegrass  United Kingdom
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Here is a link to a picture of the actual circuit board

Photo on 2011-03-29 at 15.07 | Flickr - Photo Sharing!
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Old 29th March 2011, 02:05 PM   #3
jaycee is offline jaycee  United Kingdom
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Swap the opamps for NE5532. There isn't really much past that. Better opamps are not worthwhile in this circuit. Maybe swap the 10uF input capacitors for some better capacitors, polyester ones if you can get them.
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Old 29th March 2011, 02:50 PM   #4
Fenris is offline Fenris  United States
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Ewwww. Variable gain by feedback through a pot? No bypass caps? Not sure much can be done with this circuit.
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