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FJR Motorcycle Forums
Technical & Mechanical Problems
Impedance matching audio circuit
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<blockquote data-quote="mcatrophy" data-source="post: 915675" data-attributes="member: 3187"><p>Without checking your sums (they do look about right), do you actually need to impedance match?</p><p></p><p>A resistive impedance matching pad such as this will prevent reflections, but will reduce power transfer considerably.</p><p></p><p>I suspect you would do better simply to put a 16 ohm resistor in series to make the 16 ohms of the earpiece up to 32 (assuming 32 is sufficient to prevent the thermal run-away), this will give the maximum power into the earpiece albeit with a little resonant distortion, the amount of distortion depending on all sorts of factors, but probably you won't notice the difference whilst riding a motorcycle.</p></blockquote><p></p>
[QUOTE="mcatrophy, post: 915675, member: 3187"] Without checking your sums (they do look about right), do you actually need to impedance match? A resistive impedance matching pad such as this will prevent reflections, but will reduce power transfer considerably. I suspect you would do better simply to put a 16 ohm resistor in series to make the 16 ohms of the earpiece up to 32 (assuming 32 is sufficient to prevent the thermal run-away), this will give the maximum power into the earpiece albeit with a little resonant distortion, the amount of distortion depending on all sorts of factors, but probably you won't notice the difference whilst riding a motorcycle. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Impedance matching audio circuit
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