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SFD - Spiral Flow Device
ensuring their acoustic characteristics mutually complement and enhance each other
the LSR ear tips
2 Ultra-High
This results in improved sound performance with enhanced clarity
NA7S (Custom) SFD - Spiral Flow DeviceThe NA7S is an advanced model in the Nostalgia Audio Professional Series, engineered for exceptional reproduction of female vocals and a high transparency soundstage. This model embodies the brand's dedication to audio quality and ergonomic design, catering to music professionals, audiophiles, and discerning listeners. Designed as a premium in ear monitor, the NA7S offers a perfect balance of versatility and comfort, fitting most users' ear canals
