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smoothjazzsteve 25th December 2019 02:11 PM

Pro Headphone Attenuator,,
Happy Christmas,,

Has anyone got a circuit diagram for a headphone attenuator to suits 250 Ohm Headphones, The output fro my mixer is still quite loud through these Headphones,
Many thanks,,

DrewE 26th December 2019 03:24 PM

Does your mixer not have a headphone level control already? Can't you turn the level down there?

I think standard practice in this case would be an L pad--a series resistor leading to the driver in parallel with another resistor. I think a series resistor of about 125 ohms and a parallel one of about 250 ohms would be a reasonable starting point, giving about a 6 dB attenuation while maintaining approximately the same overall impedance, if my mental math is roughly correct. The exact values are not critical; matching them between the two sides is a bit more important, at least within reason. 1/4 watt resistors ought to be sufficient.

There are also plenty of headphone level control/attenuator gizmos available for not too much money, though I supsect most of them are designed for lower impedance headphones. For example, here's one. I have no specific experience with this one or others, so can't make a specific recommendation; it's only an example.

Jay Rose 26th December 2019 08:22 PM

If you decide to use a stereo variable L pad for the headphones, be aware that cheap ones might not have good left/right tracking... which is important if you're mixing with them. (If you're just tracking, and mix with your calibrated monitor speakers, this isn't a problem.)

ruffrecords 27th December 2019 01:45 AM

Headphones work best when fed from a specific source impedance. If you feed them from to high an impedance then there will be insufficient damping and the phones will no longer be accurate.



smoothjazzsteve 3rd January 2020 03:30 PM

Many thanks for you replies,,kfhkhkfhkh