Rolling off highs from headphone socket?

Tony Harris · From: England

My little home practice amp sounds fine with guitar or steel, except when using the headphone socket - it's much too 'hi-fi'/direct inject sounding. I guess this is because guitar speakers only go up to about 5-6KHz. Is there a way of rolling off the highs at the headphone socket to emulate this - guess its a little capacitor - any electronic whizz-kids able to guess which value to try? Thanks.

Will Holtz · From: San Francisco, California, USA

Doing a simple single pole RC low pass filter (resistor between input and ouput, cap between output and ground), try 200nF and 100 Ohms. That should get a -3dB point of around 5kHz.

[This message was edited by Will Holtz on 10 February 2005 at 09:34 AM.]

Jack Stoner · From: Kansas City, MO

Most "headphone" outputs are frequency compensated so it sonds good on headphones. It's not a "flat" frequency response output.

Tony Harris · From: England

Thanks guys.

Paul Osbty · From: Seattle, Washington, USA

Keep in mind many headphone jacks are in parallel with the internal speaker. They use inline resistors to compensate for the volume. The total high resistance of all of this doesn't affect the amp's tone. Headphones draw very little current.

The highs you are hearing can simply be the capability of the headphones. The speaker just doesn't reproduce them.

[This message was edited by Paul Osbty on 17 February 2005 at 02:49 AM.]

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