funkyfish
100+ Head-Fier
Beginning of this year I built a 2A3 SET amp for my speakers, but since I'm usually more into headphones, I wanted to figure out how it sounds when I connect my headphones to it. The amp creates just 1w, so I thought that should work somewhat well with headphones.
When I investigated how to properly do that (without using a different / additional transformer), I stumbled upon the RobinetteBox and the associated Headphone Resistor Network Calculator. I wasn't happy about the values I got though and found it a bit cumbersome to try to find better values with that tool (also because I have multiple headphones with different impedances), so I put everything into Excel where I could see multiple calculated values at once. That was annoying after a while as well though, so I created this little online tool: Calculate Resistors for an Amplifier to Headphone Adapter
If you want to build an adapter which allows you to connect headphones to the speaker jacks of your amp, you can add the impedances of multiple headphones, the output impedance of your amp, set the target values you want to achieve (speaker load, attenuation and damping factor) and then see which circuit would work best with which resistor values.
Btw the only circuit that makes sense for me is the one with three resistors. The others (which usually get recommended) always have one value which is outside of my target.
I don't really have a clue of electrical engineering and stuff like that, so if there are any mistakes in the terms that I used etc, I would appreciate some feedback!
When I investigated how to properly do that (without using a different / additional transformer), I stumbled upon the RobinetteBox and the associated Headphone Resistor Network Calculator. I wasn't happy about the values I got though and found it a bit cumbersome to try to find better values with that tool (also because I have multiple headphones with different impedances), so I put everything into Excel where I could see multiple calculated values at once. That was annoying after a while as well though, so I created this little online tool: Calculate Resistors for an Amplifier to Headphone Adapter
If you want to build an adapter which allows you to connect headphones to the speaker jacks of your amp, you can add the impedances of multiple headphones, the output impedance of your amp, set the target values you want to achieve (speaker load, attenuation and damping factor) and then see which circuit would work best with which resistor values.
Btw the only circuit that makes sense for me is the one with three resistors. The others (which usually get recommended) always have one value which is outside of my target.
I don't really have a clue of electrical engineering and stuff like that, so if there are any mistakes in the terms that I used etc, I would appreciate some feedback!
