Portable multi-speaker wireless audio system for hall
We have various halls that we carry out school events in - our own, smallish, hall, the church hall across the road and another couple of locations scattered around central London. Our own main hall, used for assemblies and so on, has listed wooden panelling, so we can't mount speakers or start nailing cable all over the place. We currently use a trolly with a 19" rack-mount mixing deck, amplifier and CD player mounted in the front with a Bose 802 Series II speaker in the back. This proves adequate for our small assembly hall but can't really produce enough sound for the larger hall accross the road. The setup is also poving a bit unweildy as one large cabinet with all the equipment in takes a bit of moving, especially if we're trying to get it in to the minibus to drive it down the road somewhere.
We do have a second speaker, but getting that set up means setting up a stand, attaching the speaker and running cables back to the amplifier in the cabinet - not the quickest of jobs if you only have half an hour to set a hall up at short notice. I'm thinking of how to set up a system to replace/complement this setup that will produce decent sound (we don't require anything too fancy, just voice amplification for assemblies and the ability to play CDs/MP3s). Is the cheapest/best option therefore a bunch of guitar-practice style amps from Argos:
Buy 15W Practice Amp at Argos.co.uk - Your Online Shop for Musical accessories.
Strapped into a trolly each:
Buy Cookworks Solid Wood Kitchen Trolley with 2 Shelves at Argos.co.uk - Your Online Shop for Kitchen trolleys.
With decent castors added:
4 Heavy Duty Rubber Castor Caster Wheels Plate 100mm 4" | eBay
And then a wireless audio receiver connected to the input of each amp:
2.4GHz Wireless Audio Video AV Transmitter Receiver 4CH | eBay
With one transmitter transmitting from the mixing deck. This way, I figure I should be able to transmit a wireless audio signal to however many speakers we want, and all we have to do is find a mains socket for each speaker. Each speaker/trolly/wheels set would cost around £100, and we should be able to add as many as we like to cover whatever area we need with audio.
Does anybody have any comments, or a better way of going about this? Does anyone know if the wireless transmitters used will cause too much inteference with wireless networking? Do they work okay alongside wireless microphones, or do the two systems intefere with each other? Can I use two transmitters and transmit the left stereo audio signal on one and the right on the other, setting up speakers in appropriate places and getting proper stereo sound?