Compact closed-air active dynamic bass headphones with analog circuitry and built-in effects from amPlug series that provide a top boost sound of the legendary custom valve guitar amplifier AC30. They feature a built-in amPlug technology with amplifier simulator that allows plugging them directly into the instrument, as well as headphone technology from Audio-Technica so they can be used as conventional headphones when the amplifier simulator is switched off. Amp section provides maximum output of 1.4 V, dial controls (Gain, Tone, Volume, Effect) and a switch for Standby mode. Headphones are equipped with 40 mm drivers that provide frequency range of 20 Hz-20 kHz and output sound pressure level of 97 dB. They provide a bass guitar input and aux input, and 1.3 m long cable. When using as the amplifier simulator, two AAA batteries are required for operation (included). 3.5 mm to 6.3 mm plug adapter is included. Maximum output: 1000 mV. Impedance: 49 Ohm. Dimensions: 195 x 160 x 50 mm. Weight: 230 g. Brown, silver and black colour combination.