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Old 20th September 2012, 10:13 PM   #1
r47 is offline r47
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Default Creating headphone jack from speaker out

I'm trying to add a bluetooth transmitter to my motorcycle stereo so that I can receive bluetooth audio in my helmet.

My current plan is to convert the powered rear speaker out into a suitable 3.5mm female headphone jack. The stereo manual claims speakers connected to the rear speaker out should have input impedance of 10 kOhm and an ouput signal level of <=1 V effective.

Do I need to worry about an impedance imbalance? I've researched this topic and did find the often-cited Rod Elliott article here Headphone Adaptor for Power Amplifiers

I'm not sure if a small amp like mine would still require such an approach. I appreciate you sharing your thoughts and experience.
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Old 1st October 2012, 05:14 AM   #2
rjm is offline rjm  Japan
Richard Murdey
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Location: Kyoto
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A "powered rear speaker out" is a line level output, so you can just connect it directly to the bluetooth transmitter, or a headphone amplifier for example.
RJM Audio ( / G+)
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