The NF series features a compact 4-inch (10cm) HR-shaped woofer unit, delivering tight, high-speed, and surprisingly deep bass that surpasses its size. With the adoption of "UDR Tangential Edge" and "Push-Pull Damper," it eliminates reverse resonance in the edge, ensuring excellent linearity and a responsive mid-low range.
The NF series introduces a UFLC soft dome tweeter that exhibits high responsiveness and fidelity even with delicate audio signals. The soft dome design ensures accurate reproduction of intricate details, while the implementation of magnetic fluid in the magnetic circuit enables stable operation over extended periods of use.
The NF series features a high-performance D-Class amplifier, delivering 30W for the woofer and 20W for the tweeter, enabling efficient and powerful driving of the speaker units in a bi-amp configuration.
The NF series introduces adjustable sound pressure levels to suit different listening environments. It allows for adjusting the bass level by -2dB, -4dB, or -6dB, and the tweeter level by -2dB. Additionally, it offers a GAIN switch for matching the output level of external audio devices, with options for 0dB or +10dB.
The HR (HP Rotation) shape, known in the field of architectural structural mechanics, is an improved version of the HP (Hyperbolic Paraboloidal) shape achieved by incorporating rotational elements along the circumference. This shape experiences shear forces as internal stress, eliminating bending stress and resulting in a lightweight structure with high rigidity. Additionally, it disperses resonance caused by divided vibrations, making it an ideal shape for the diaphragm.
The UFLC (Ultra Fine Layered Construction) diaphragm, made of polyurethane resin with a polyurethane film laminated on a cloth material, is employed in the high-frequency tweeters of this device. By utilizing this diaphragm, it becomes possible to faithfully reproduce audio signals with natural extension into the high-frequency range.
The UDR (Up/Down Roll) Tangential Edge is an innovative edge structure that combines upward and downward rolls using a tangential surface. Its shape is optimized based on FEM (Finite Element Method) modal analysis to maximize the functionality of the edge. This groundbreaking edge design is employed in the woofers, which play a crucial role in the speaker's performance.
The SN04 Speaker Grill is designed specifically for the NF04R model. It features a high-precision resin-molded frame and a robust steel punching grill.
- The high-precision resin-molded frame ensures a perfect fit.
- Cushion materials are strategically placed on the inner side to provide stability and prevent rattling during installation.
- The grill can be easily removed and attached without the need for screws.
- Suitable for various applications in relay stations, halls, and other audio equipment settings.
The EB-6301 Wall Mount Bracket enables angle adjustments and wall installation for speakers.
- Adjustable angle for the speaker body to achieve the desired sound projection.
- Constructed with a robust 3mm thick iron plate for durability and stability.
2 way bass reflex type
100mm HR shape woofer
19mm soft dome tweeter
57Hz - 36kHz
Woofer: 30W, Tweeter: 20W
Balanced：XLR-3-31 type (No. 2 HOT)
Unbalanced：φ 6.3 mm (1/4”) TS phone
-10dBV (TS phone) / +4dBu (XLR) GAIN SW 0dB
-20dBV (TS phone) / -6dBu (XLR) GAIN SW +10dB
20kΩ or more
– ∞ ~ 0dB
LO FREQUENCY (80Hz)
0 / -2 / -4 / -6dB
(W)120 × (H)189 × (D)157mm
Power supply (AC IN)
220V to 50/60Hz