NR-PD1890

The NR-PD1890 speaker driver is a robust component engineered for serious low-frequency output. As a “naked speaker,” it is intended to be installed into a custom-designed enclosure (cabinet) that is optimized for its acoustic properties, such as a scoop bin, conventional reflex cabinet, or horn-loaded system.

Key Specifications and Features (derived from PD 1890 and similar models):

Driver Size: 18 inches (460 mm nominal diameter) – this large size is essential for moving significant amounts of air to produce deep bass frequencies.

Type: Typically a subwoofer or bass driver, designed to excel in low-frequency reproduction.

Power Rating:

AES (Continuous): Often rated around 800W, with some “Heavy Bass” versions reaching up to 2000W or 3000W AES.

Peak Power: Can range from 3200W up to potentially 6000W (for heavy-duty versions) on a 6dB crest factor.

Nominal Impedance: Commonly 8 Ohms, but 4 Ohm and 16 Ohm versions might also be available.

Sensitivity: Typically around 95 dB to 98 dB (1W/1m), indicating good efficiency for its size.

Frequency Range: Generally covers from around 35 Hz to 2 kHz, optimized for bass and mid-bass frequencies.

Voice Coil Diameter: A significant feature is its large voice coil, commonly 5 inches (127 mm) or even 6 inches (152 mm) on the “Heavy Bass” models. A larger voice coil contributes to better heat dissipation, higher power handling, and improved mechanical control.

Construction:

Chassis: Usually a heavy-duty cast aluminum chassis, providing rigidity, reducing resonance, and aiding in heat dissipation.

Cone: Typically made of paper, sometimes with reinforced coatings or carbon fiber for durability and response.

Surround: Often a fabric or paper surround designed for controlled excursion.

Magnet: A powerful ceramic magnet assembly.

Suspension: Features like double suspension are common for managing large cone movements and ensuring linearity.

Applications:

Professional PA Systems: As a primary subwoofer driver in cabinets for live music, concerts, and events.

DJ Setups: To provide the deep, impactful bass required for various music genres.

Custom Speaker Builds: Ideal for DIY enthusiasts and professionals creating their own subwoofer enclosures.

Club and Venue Installations: For systems demanding high SPL and powerful low-end.