For music, which doesn't require a securely negotiated connection, I'd prefer a bag of small, cheap FM transmitter/receiver devices with a simple frequency sele

For music, which doesn't require a securely negotiated connection, I'd prefer a bag of small, cheap FM transmitter/receiver devices with a simple frequency selector. You could have limitless(?) FM receivers tuned to the same transmitter. Imagine adding 20 discreet powered speakers to your living room, being able to place them anywhere you like... a woofer in each corner, a full-range unit on the coffee table, two floor standers playing left and right channel respectively, and a bunch of smaller speakers dotted around the kitchen, bathroom etc. The only hassle would be 'changing the channel', but you would work that out I'm sure. Each room could get its own frequency, and each member of the household could get their own personal frequency. you could revive your old Sony AM/FM Walkman... Edit: So I just searched, and such a thing exists. Not the crappy in-car things that insist on cigarette lighter power supply, but a wearable device (aimed primarily at tour guides). For under £200 you can get a Retekess FT11 transmitter and 10x V112 receivers. Tempting...