We have 2 recommendations to remove static, background noise.
1. Make sure that the volume on your mobile phone or other device is set to maximum volume for best sound quality.
2. Some customers have reported that be sliding the power button to the left position on the Duo reduces background noise.Continue reading: How do I get rid of static, background noise when using the CoolStream Duo on my dock?
The CoolStream Duo is NOT compatible with the Sony ICF-CS15IP using only the 30 pin connector. You can use the audio cable included with the CoolStream Duo to connect to the Sony’s 3.5mm AUX jack.
Here are the steps of how to use the CoolStream Duo with the Sony ICF-CS15IP.Continue reading: Does the CoolStream Duo work with the Sony ICF-CS15IP?
Plug the CoolStream Duo on to the Sony’s 30 pin iPod connector.