Sony CMT-CP1 Micro HiFi Upgrade to Bluetooth My old Sony CMT-CP1 only tends to be used as a radio these days. All my CDs have been ripped to MP3, boxed up and stashed away and, as for cassettes, I can't remember the last time I even saw one. The stereo still looks smart and sounds great though, so I thought I'd have a go at adding a bluetooth receiver to it, giving it a new lease of life. So below is a summary of what I did. If you want to see more detail, I have uploaded a YouTube video here . This is the bluetooth module that I chose, the KRC-86B V4.0. It cost about £7.50 on eBay and I have to say I'm impressed by the general build quality. It's pretty compact too! It has switch inputs for track select and volume, but you don't have to connect these if you're going to control everything from your tablet or smartphone. It also has stereo line inputs so you can feed another music source into it (eg radio, CD or whatever) a...