From the manufacturer MR4 Powered Studio Monitor Speakers Professionally Tuned For the True Music Based on the accurate analysis of the characteristics of the unit by the German KLIPPEL system, a flatter curve necessary for a monitor is acquired after dozens of professional tunings by Edifier Acoustic Lab. Supreme Deep Bass For More Low-Frequency Details With a 4-inch woofer and the support of Class-D amplifier, the frequency can be lowered to 60Hz, fully realizing the remarkable performance of the low frequency. Working with Professional Equipment With 6.35mm TRS balanced input jacks, MR4 Studio Monitor can connect to console, mixer and other professional equipment with the input sensibility of 4dBu to build a small music production system. Upgraded Professional Quality Moderate MICA added to the traditional PP cone keeps the hearing of softness and relaxation with more natural details and strengthens the rigidness and hardness of the cone to enhance the low frequency and to extend the depth of bass. Pure Output Different from other entry-level monitoring speakers, MR4 adopts inductive and capacitive second-order frequency divider, so that both the woofer and tweeter can acquire better signal input and reproduce the purity of the sound. Less Resonance The MR4 adopts MDF wooden structure to reduce resonance and rendering effects to restore the original tone. Easy to Operate and Control Rotate the multi-function knob at the front to adjust the volume, while power on/off by long-pressing it and double-click to switch between the sound modes. No Limitation for Connection In addition to balanced TRS input, MR4 also has two unbalanced RCA/AUX inputs and a front headphone output, which provide convenient connection to different devices simultaneously and switch to monitoring mode output to headphones. D12 Desktop Stereo Speaker 70w RMS:  The Edifier D12 is a high quality desktop Bluetooth speaker that offers rich 2.1 sound quality with added bass from the built in ported subwoofer. Unlike many other complicated speakers, you don’t have to struggle to set it up, and it won’t take up too much space. Place it wherever you want, such as your living room, study room, dining room, or bedroom, just connect the power supply and it’s ready to use. A quality wooden enclosure with minimiSes acoustic resonance outputs a sound beyond anything you have listened to before. RCA/AUX input port for versatile connectivity to external devices such as a TV, turntable, DVD, and a line out if you ever want to add an extra subwoofer or active speakers. Also, you can connect it wirelessly with your smartphone, laptop with the help of Bluetooth 5.0 connectivity. Three top-mounted knobs (Bass dial, treble dial, volume control/input selector) allow for simple, accurate control of the treble, bass, and volume/input. Supplied with an easy-to-use remote control, so you can quickly adjust volume or switch to the mode you want: movie mode, music mode, or other input models. Note: In Movie mode, the sound quality will be changed or distorted when the sound field is extended. Therefore, please enable Music mode when listening to music.