HD 4004

The Sennheiser HD 4004 is a dynamic open-back headphone model designed for high-quality sound reproduction. These headphones are equipped with a comfortable headband and ear pads, ensuring a good fit for extended listening sessions. The open design allows for a more natural soundstage, making them suitable for audio applications where spatial awareness is important. The HD 4004 is notable for its rich midrange response and detailed treble, although it may not have the same level of bass impact as closed-back alternatives. Specs typically include a frequency response range of approximately 20 Hz to 20 kHz, an impedance of around 300 ohms, and a sensitivity rating which allows them to perform well with a variety of audio equipment, from portable devices to professional studio gear.