The DM series speakers deliver balanced, punchy bass sound and they can pump out extra power thanks to the new Class D amplifier and 4" 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 and mini jack 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-40D-BT enables you to easily pair your smartphone, mobile device, or PC / Mac and play high-quality tracks wirelessly. The woofer and tweeter are perfectly aligned so you’ll hear all sound frequencies clearly. The 4" woofer creates powerful sound without distorting, even if you pump up the volume a little bit.