Fostex　フォステクス　NF04R　パワード・モニタースピーカー　アクティブスピーカー　スタジオモニター送料無料

Fostex / NF04R パワード・モニタースピーカー

The NF04R is a powered monitor speaker. It features the smallest 4-inch (10cm) HR-shaped woofer unit in the NF series. It has a built-in high-performance Class D amplifier with 30W for the woofer and 20W for the tweeter, delivering tight, high-speed bass.

■Powered Monitor Speaker

■4""

■LF30W/HF20W

■1 unit

The NF series' first speaker to feature an aluminum die-cast body. An innovative small active speaker equipped with a 4-inch HR-shaped woofer unit.

● The smallest 4-inch (10cm) HR-shaped woofer unit in the NF series. Achieves tight, high-speed bass that exceeds its size. Employs ""UDR Tangential Edge"" and ""Push-Pull Damper."" Eliminates reverse resonance of the edge, resulting in excellent linearity and responsive mid-low frequencies.

● Soft dome tweeter with ""UFLC diaphragm"" for high tracking and reproduction of even minute signals. Magnetic fluid is used in the magnetic circuit for stable operation even during long periods of use.

● Equipped with a high-performance Class D amplifier with 30W for the woofer and 20W for the tweeter, driving the speaker unit in a bi-amp system.

● Equipped with a sound pressure level adjustment function to suit the listening environment. The low-frequency response can be adjusted to -2dB, -4dB, or -6dB, and the tweeter's sound pressure level can be adjusted to -2dB. The GAIN can be switched between 0dB and +10dB to match the output level of external audio equipment.

●HR Diaphragm

HR (HP ROTATION) is an improved version of the HP (HYPERBOLIC PARABOLOIDAL) shape, known in the field of structural mechanics, with added rotation in the circumferential direction. This shape allows only shear force to act as internal stress, eliminating bending stress, resulting in a lightweight and highly rigid design. It also disperses resonance caused by partial vibrations, making it an ideal shape for a diaphragm.

●UFLC Diaphragm

UFLC is a diaphragm made from poly-urethane resin, where a urethane film is laminated onto a cloth material. This diaphragm is used in the tweeter of this unit. Using this diaphragm allows for faithful reproduction of audio signals with natural extension to high frequencies.

●UDR Tangential Edge

The UDR (UP/DOWN ROLL) tangential edge is an innovative edge structure that combines up-roll and down-roll surfaces in a tangential manner. Its shape is optimized for the edge's function based on FEM modal analysis. It is used in the woofer edge, which plays a crucial role in speaker operation.

UDR Tangential Edge

UDR

■Speaker Section

Enclosure Type

2-way bass reflex type

■Driver Units

100mm HR-shaped woofer

19mm soft dome tweeter

■Frequency Response

57Hz?36kHz

■Internal Volume

2.8m?

■Rated Output

Woofer: 30W, Tweeter: 20W

■Input Terminals

XLR-3-31 type (Pin 2 HOT) (Balanced)

φ 6.3 mm (1/4"") TS phone (Unbalanced)

■Rated Input Level

-10dBV (TS phone) / +4dBu (XLR) GAIN SW 0dB

-20dBV (TS phone) / -6dBu (XLR) GAIN SW +10dB

■Input Impedance

20kΩ or higher

■Volume

-∞ to 0dB

■LO FREQUENCY (80Hz)

0 / -2 / -4 / -6dB

■Tweeter Level

0 / -2dB

■Gain

0 / +10dB

■External Dimensions

(W)120 × (H)189 × (D)157mm *Excluding protrusions

■Weight

Approx. 3.1kg

■Power Supply (AC IN)

100 V ~ 50/60 Hz

■Power Consumption

30W

■1 unit