Fostex NF04R Compact 2-Way 50W Active Studio Monitor (Single) - 4" SKU# NF04R

The Fostex NF04R is a compact, active monitor designed to provide a detailed and balanced sonic image for critical listening and mixing in near-field environments—at home or in the studio. The monitor features a 4" HR-shaped woofer and a 0.75" UFLC soft-dome tweeter, each driven by dedicated Class-D amplifiers (30W and 20W respectively). The NF04R's design emphasizes accurate sound reproduction with surprisingly deep and tight bass for its size, thanks to technologies like UDR Tangential Edge and Push-Pull Damper, which eliminate speaker resonance.

Key features include adjustable woofer and tweeter levels, a gain switch for input-level matching, and both balanced XLR and unbalanced 1/4" TS inputs. The NF04R's compact dimensions and relatively light weight make it suitable for use on desktops and in smaller spaces.

• 4" HR (Hyperbolic Paraboloidal Rotation)-shaped woofer, delivering tight, high-speed, and surprisingly deep bass for its size
• UDR Tangential Edge and Push-Pull Damper technologies in the woofer eliminate unwanted resonance, ensuring excellent linearity and a responsive mid-low range.
• UFLC soft dome tweeter uses an ultrafine layered-construction (UFLC) diaphragm, providing high responsiveness and faithful reproduction of delicate high-frequency audio signals. Magnetic fluid in the magnetic circuit ensures stable long-term operation.
• Bi-amplification with high-performance D-Class amplifiers: It has a dedicated 30W amplifier for the woofer and a 20W amplifier for the tweeter, providing efficient and powerful drive.
• Adjustable sound-pressure levels: You can adjust the bass level (-2, -4, -6 dB at 80 Hz) and the tweeter level (-2 dB) to suit your listening environment.
• Adjustable gain: A gain switch (0/+10 dB) allows for matching the input level from various audio devices.
• HR Diaphragm: This woofer diaphragm shape, derived from architectural structural mechanics, is lightweight, highly rigid, and effectively disperses resonance.
• High-Precision resin-molded enclosure ensures a perfect fit and stability, with internal cushioning to prevent rattling.
• Connectivity: Offers both balanced (XLR) and unbalanced (1/4" TS) inputs.

• Compact Near-Field Monitor
• 2-Way with D-Class Amplifiers
• 4" HR-Shaped Woofer, 30W
• 0.75" Soft-Dome Tweeter, 20W
• Resin-Molded Bass-Reflex Enclosure
• Frequency Response: 57 Hz to 36 kHz
• Switchable Overall Gain: +10 dB
• Switchable Woofer Level: 0/-2/-4/-6 dB
• Switchable Tweeter Level: 0/-2 dB
• Balanced XLR & Unbalanced 1/4" TS Inputs

• Fostex NF04R Compact 4" 2-Way 50W Active Speaker (Single)
• Power Cord