Sony MHC-V7D High-Power Home Audio System with Bluetooth. Big parties need a big sound system. With the Sound Pressure Horn, the MHC-V7D can deliver 1550W level sound pressure (1440W RMS, 105.5dB SPL) from a vertical, space-saving box design. Put your spin on the party with fun gesture control—change up the LED speaker lights, add DJ effects, or simply skip a track in one simple move. So buy this Sony MHC-V7D High-Power Home Audio System with Bluetooth Now £479.00.