The 8cm woofer unit offers significantly better basic characteristics as a result of various improvements made such as the reduced weight of the voice coil and increased rigidity of the diaphragm. The woofer provides superb response and sound clarity to reproduce mid and high frequency sound comfortable to the ear. The high-res-ready 2cm dome tweeter unit features a lighter silk diaphragm to provide beautiful lingering sound. Whats more the acoustic lens is optimised for the new tweeter shape and enhances the expansiveness of reproduced sound. In order to faithfully reproduce the information of rich sounds with the 2.1ch configuration three \"JENO Engine\" full digital amplifier units have been equipped. In addition to utilising the excellent processing capacity of the three units and faithfully driving the left and right channels and subwoofer \"Space Tune\" which optimises the sound quality depending on the installation status has been realised. The SC-C70MK2 features Space Tune™ Auto to achieve optimally balanced sound easily with the press of a button. This function measures test tones played through a mic that is built into the SC-C70MK2 to analyse the distance to walls and the effect of reflections. It then automatically optimises the sound field. In addition the Space Tune™ function includes 3 presets (Free Near the Wall and Near the Corner) for easy setting and uses a Technics Audio Center app to precisely adjust the sound quality to the listening position. With a number of Chromecast built-in speakers the variety of music streaming services can be played in several rooms or different music can be played from room to room*. In addition if you use Technics Audio Center app and have another app compatible Technics devices you can also enjoy other music source in multi-room such as Bluetooth AUX Optical input USB Internet radio and also OTTAVA™ f SC-C70MK2 compatible streaming music. * The Google Home App is required. In addition to CDs and radio this model is newly compatible with Chromecast built-in and supports a wide range of music streaming services. Furthermore it is also compatible with Spotify Connect Deezer and Internet radio. It is also compatible AirPlay 2 Bluetooth Wi-Fi network playback USB memory playback and analogue/optical input to allow you to enjoy various sound sources with one unit. The UI of our iOS/Android smartphone app \"Technics Audio Center App\" has also been redesigned making it easier to use than ever before.