Hardly used home cinema and music system, unbelievable sound from a small set, can fill a large room with sound and also includes the sub woofer which adds amazing deep low rumbles when watching movies. Happy for buyer to come over and check out the set up to listen to this as it is so easy to unplug and pack away. The Core speaker is mains and battery operated meaning that you can take this into the garden or beach to use - a full charge lasts around 22 hours!!Can be used as a sound bar which is what I have used it for with the sub but with 2 young children over the last few years I find that I am not able to make much use of this amazing equipment now. The items are from a smoke free home and have been looked after well with no cosmetic damage or scratches on any of the items. For further information please read below or search youtube/amazon for the reviews of the Core and the Core Sub. They both work amazingly well with each other. The Mass Fidelity Core Wireless Bluetooth Speaker produces stunning cinematic sound, with smooth highs, crystal clear midrange and bone-shaking bass. It uses an acoustic holography technology to produce a stereo sound field that is astonishing in size and sound quality. It's like listening to a pair of high-end speakers, except it's coming from a device that's small enough to hold in your hand. The Core connects wireless to any Bluetooth equipped smartphone, tablet, or PC. And you won’t need a new application or passwords to learn. Just connect and enjoy! Use your phone or tablet as remote control for your sound system; it’s that easy. The Core uses the finest Bluetooth quality to stream any format of music from your smart device, laptop or PC.Advanced Audio Coding (AAC) and aptX combine to bring out the best possible sound from your digital sources. It supports “tap to pair” NFC and features a built-in USB port to charge your smart device when it is running low on battery. With the touch of a button you can wirelessly connect up to eight Cores throughout your home. No router or special application is needed, the Core creates its own 5 GHz dedicated network. Just push a button and voilà you have whole house audio! Each speaker can play a local source or receive music from one central unit. The Core produces a huge stereo sound field. While most single speaker systems claim to be “room-filling,” they are unable to produce a realistic stereo effect. The Core utilizes advanced acoustic rendering technology to create the illusion of two widely-spaced speakers. The Core makes listening to music more fun for you and your friends. The built-in amplifiers are clean and powerful, providing plenty of power to fill your room with deep rich sound. We have carefully chosen several cutting-edge technologies to create the Core’s phenomenal acoustic performance. It all starts with five custom-designed speaker drivers in three arrays along with a downward-firing woofer, driven by 120 Watts of digital power. Several digital signal processors bring out the best in any type of music you choose to play, while an ARM processing core intuitively works to keep the whole system synchronized.In a traditional stereo set up, listeners need to sit between two speakers to hear a well-balanced stereo image. Audiophiles refer to that as the “sweet spot.” To eliminate the sweet spot, the Core uses an audio rendering technique called Wave Field Synthesis to produce a virtual acoustic scene. This acoustic image can be “viewed” from any position in the room and does not depend on the listener’s position. To achieve its amazing sonic feats, the Core uses an Acoustic Holography technology to produce a stereo sound field that is astonishing in size and sound quality. This technique works by physically recreating sound in space – similar to a hologram – which is purer and sounds even better than traditional stereo or surround sound .Absolute Bass Technology (ABT) is a combination of electronics, software, and mechanical engineering working in unison to produce a low frequency performance unmatched for its size. The end result is a speaker that you can hold in your hand that makes real bass, the kind you can feel and not just hear. Connect any wired or wireless external subwoofer to the Core for over-the-top bass performance perfect for action movies and parties, or an action movie party. When connected to a subwoofer, the Core uses Dynamic Re-tuning Technology: it automatically ceases all the bass duties and concentrates on flawless, higher output midrange and high frequency reproduction. Whatever music sources your Bluetooth enabled smart device can access, The Core can play. You will have full access to a virtually unlimited universe of music via streaming services like Spotify and Pandora plus thousands of online radio stations and podcasts. You can also access any music library, whether cloud-based or on a wireless home network. Imagine having all the digital music you own immediately available to enjoy! The possibilities are endless. The Core features an Optical digital connector and an analog input so you can connect wired sound sources such as a CD player, turntable (with a phono preamp), video streaming device, PC or music server. High-resolution music fans will be happy to know that the Core can handle PCM streams up to 24 bit/192kHz for pristine sound. You'll be able to play a high-res digital file or vinyl record in one room and hear it in any other room that has a Core.