The Rotosound RS 4000 M is a professional four-string set for double bass that offers exceptional sound quality and versatility, making it ideal for jazz and rockabilly styles. This set features a unique construction: the G and D strings have a nylon-on-nylon core for flexibility, while the E and A strings are made with Monel flatwound on a nylon core, delivering a warm yet clear tone with reduced finger noise. The string gauges are precisely calibrated at 2.13 mm, 2.67 mm, 2.21 mm, and 2.64 mm, ensuring consistent tension and playability. Manufactured in the UK, these strings are designed for durability and reliable performance, meeting the demands of discerning musicians. They provide a balanced response across all positions, enhancing articulation and sustain while maintaining a classic feel. Exclusively compatible with double bass instruments, the RS 4000 M set supports a wide dynamic range and is designed for regular use without compromising tonal integrity. Ideal for studio recordings and live performances, these strings help achieve a rich, nuanced sound that adapts to various playing techniques. The robust design minimizes the risk of breakage and maintains tuning stability, making them a practical choice for both practice and professional applications. This product focuses on providing high-quality materials and precise manufacturing for lasting musical expression.