The Yamaha NS-15 is a two-way bookshelf speaker that features a compact design suitable for various applications, including home audio setups and small studio environments. The speaker is equipped with a 5-inch cone woofer, delivering a balanced bass response, while a 1-inch soft dome tweeter provides clear high-frequency reproduction. The NS-15 is designed with a frequency response range from approximately 40 Hz to 20 kHz, allowing it to reproduce a wide spectrum of audio signals. Its impedance is typically around 8 ohms, making it compatible with various amplifiers. The cabinet construction is solid, aiding in sound quality and minimizing resonance. The speakers are often praised for their ability to deliver detailed sound with good imaging and stereo separation, suitable for critical listening. The NS-15 also features a rear bass port to enhance low-frequency performance.