The Yamaha NS-90 is a speaker model produced by Yamaha. It is designed to deliver high-quality audio performance with accurate sound reproduction. The speaker features a two-way design with a woofer and a tweeter. It comes with a sturdy cabinet construction to minimize resonance and enhance sound clarity. The NS-90 is known for its balanced sound output and wide frequency response. It is suitable for various listening environments and can be used for home audio systems or professional applications.