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Posted on Mar 29, 2009

Connecting BA735 digital 3.5mm plug with S/PDIF coax jack

I have a Boston Acoustic BA735 digital speaker set that has a male mono 3.5mm plug that I am trying to connect to a female coax S/P DIF jack on the port replicator with my Dell D630. I did buy an adapter with a male RCA to female 3.5mm to make a physical connection but still no sound. I did go into speaker properties in XP control panel and check the S/PDIF box. What am I doing wrong?

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  • Posted on Apr 30, 2009
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The male mono plug (from the left small speaker) should be connected into the right speaker (small speaker with controls) . After plugging the multi pin cable from the control speaker to the sub-woofer you need to plug in a signal source from your computer (or any other digital signal) into the sub-woofer. This digital input looks like an ordinary RCA plug but carries many channels of audio. That connects to the enabled digital output of your computer. Some computers output digital through a 3.5mm jack others look just like an RCA phono jack. If you are lucky some BA735 sub-woofers have a second input that is a standard 3.5mm stereo jack and it will take analog audio from computer, DVD, MP3 player or the like. I have three sets of these speakers that I love because of their big volume considering such a small size.

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