The DM series speakers deliver balanced, punchy bass sound and they can pump out extra power thanks to the new Class D amplifier and 5" woofer in each unit. Flick the switch to change from DJ mode to Production mode and the DSP settings will automatically create the best sound for each application. With RCA, mini jack, and the newly added TRS input terminals, you can connect different kinds of gear such as DJ controllers and mixers, or the laptop or soundcard you use. Connecting your headphones is simple via the socket on the front panel and the level knob is right in front of you too. The Bluetooth® technology included in the DM-50D-BT enables you to easily pair your smartphone, mobile device, or PC / Mac and play high-quality tracks wirelessly. The DM-40 model comes in the updated design of the DECO convex diffusers which help deliver crystal-clear high frequencies in every direction. The woofer and tweeter are perfectly aligned. The grooves on the ducts reduce air friction so bass is tight and punchy, even if you position the speakers against a wall. The 5" woofer creates powerful sound without distorting, even if you pump up the volume a little bit.