NB-4 | 250W 4-Way Mount Tweeter

Power Acoustik NB‑4 – 1" 250W Piezo Dome Tweeters with Built-In Crossover

The Power Acoustik NB-4 tweeters are designed for car audio enthusiasts who seek sharp, defined high-frequency output without compromising clarity or introducing unnecessary noise. With a 1-inch piezoelectric dome design, these tweeters deliver clean detail throughout the upper frequency range, pairing well with subwoofers and midrange drivers for a full-range response.

Each unit features a niobium magnet structure, renowned for its energy efficiency and stability under high temperatures, making it an ideal component in high-SPL installations or multi-driver arrays. The NB-4 is rated for a maximum power of 250 watts (125 watts RMS), delivering a strong output without distortion.

Precision Frequency Response & Sound Clarity

Engineered for high-definition treble, the NB-4 tweeters cover a frequency range of 5 kHz to 25 kHz, making them suitable for cymbals, synthesizers, and upper vocal harmonics. The 97dB sensitivity rating ensures that even under moderate power, the tweeters cut through cabin noise and mix well with other speakers in your setup.

Built-in 6dB/octave high-pass crossovers filter out low frequencies, reducing the risk of mechanical stress or audio mud. This ensures the tweeters operate within their ideal range, preserving tonal detail and transient response.

Construction & Mounting Options

• Diaphragm Material: Polypropylene – low-mass and low-distortion
• Impedance: 4 ohms – easy integration with most car audio amps
• Mounting Depth: 0.75″ – ideal for shallow installs
• Mounting Type: Flush, surface, angle, and swivel included
• Cutout Diameter: 1.625″

The mounting versatility makes the NB‑4 suitable for door panels, dash pods, A-pillars, or custom pillars.

System Integration

Whether you're upgrading factory dash tweeters or building a custom component system, the NB‑4’s 4-ohm load works seamlessly with most aftermarket head units and amplifiers. It complements passive crossovers or DSP-controlled active setups well.

These are not your basic entry-level tweeters—niobium magnets, 97dB output, and multi-mount hardware give the NB‑4s the flexibility to suit both SPL (sound pressure level) and SQ (sound quality) builds.