I'm looking for advice from someone who has figured out how to connect their Sena 20S to the audio out of a radar detector. Here's my set up: Sena 20S paired to Zumo 590 for phone, music, GPS directions. Phone paired to Zumo, not the Sena. I should be able to pair another HFP BT transmitter (with 3.5 mm plugged into radar detector audio out jack) to transmit the audio alarm from radar detector to the Sena 20S, right? The Sena folks recommend their SR10 accessory for 2-way radio, radar detector, and GPS audio, but it's pretty pricey ($180).
Two questions: 1) Has anyone successfully paired a non-Sena BT (HFP) transmitter (with 3.5 audio in cable) to their Sena headset? If so, what type/brand of BT transmitter did you use? and 2) Is anyone using the Sena SM10 or Sena SR10 dongles to receive radar detector audio alarms, and if so, is there a noticeable delay in the audio transmission between the radar detector and the Sena headset (thru the SM10 or SR10)?
Of course, I would ask these questions of the Sena tech support, but their tech support is sadly lacking (they haven't replied to my emails or on-line requests, or responded to my voice mails). TIA.