NF04R
Active Speaker
With optional grille SN04
With optional bracket EB-6301
pair
First in the NF series to adopt an aluminum die-cast body.
The 4-inch HR-shaped woofer unit is mounted.
The first compact active speaker in the NF series.
Gotch (ASIAN KUNG-FU GENERATION) Review
I thought it was excellent for near field use. I like the texture of vocals and other sounds. They have a clear presence. I still think it lacks a little bit of super bass, but I think that is unavoidable due to its size. On the other hand, I thought the sound was quite impressive for that size.
I thought it was excellent for near field use. I like the texture of vocals and other sounds. They have a clear presence. I still think it lacks a little bit of super bass, but I think that is unavoidable due to its size. On the other hand, I thought the sound was quite impressive for that size.
Features
Special page → HR (HYPERBOLIC PARABOLOIDAL ROTATION) STORY
The smallest 4-inch (10cm) HR-shaped woofer unit in the NF Series. Tight, high-speed bass that transcends its size. ● UDR Tangential Edge and Push-Pull Damper are used to eliminate reverse resonance of the edge. Eliminates reverse resonance of the edges, resulting in a highly linear and responsive mid-low range.
Soft dome tweeter with UFLC diaphragm for high tracking and reproducibility of micro-signals. Magnetic fluid is used in the magnetic circuit to ensure stable operation over long periods of use.
The speaker units are driven by a high-performance D-class amplifier with 30 watts for the woofer and 20 watts for the tweeter in a bi-amplified system.
●Adjustable sound pressure level to suit the listening environment. Low-frequency characteristics can be adjusted to sound pressure levels of -2dB, -4dB, and -6dB, and tweeter sound pressure level can be adjusted to -2dB. GAIN can be switched between 0dB and +10dB according to the output level of external audio equipment.
HR Diaphragm
HR (HP ROTATION) is a circumferential rotation of the HP (HYPERBOLIC PARABOLOIDAL) shape, which is known in the field of building structural mechanics, to further improve it. This shape is ideal for diaphragms, as it is lightweight and highly rigid, and disperses resonance caused by split vibrations, since only shear forces act as internal stresses and no bending stresses.
UFLC diaphragm
UFLC is a diaphragm made of polyurethane resin with urethane film laminated to a cloth material, and is used in the tweeter of this unit. By using this diaphragm, it is possible to faithfully reproduce audio signals with natural extension to high frequencies.
●UDR Tangential Edge
UDR (UP/DOWN ROLL) Tangential Edge is a revolutionary edge structure that combines up-roll and down-roll in a tangential plane, and the shape is based on FEM modal analysis to optimize the functions that the edge has. It is used for woofer edges, which have important functions for speaker operation.
Optional for installation in a variety of environments
Speaker grille SN04 for exclusive use with NF04R
High-precision molded plastic frame and high-strength steel perforated grille are used.
The inside of the grille is cushioned in various places to ensure that the grille can be installed without rattling.
The grille can be attached and detached without the use of screws.
Can be used for relay sites, halls, and other audio equipment applications.
Wall Mounting Bracket EB-6301
The angle of the speaker body can be adjusted and mounted on the wall.
Robust steel plate 3mm thick is used.
High-precision molded plastic frame and high-strength steel perforated grille are used.
The inside of the grille is cushioned in various places to ensure that the grille can be installed without rattling.
The grille can be attached and detached without the use of screws.
Can be used for relay sites, halls, and other audio equipment applications.
The angle of the speaker body can be adjusted and mounted on the wall.
Robust steel plate 3mm thick is used.
Specifications
Main Specifications
| Speaker section | |
|---|---|
| Enclosure method | 2-way bass reflex type |
| Units used | 100mm HR shape woofer 19mm soft dome tweeter |
| Playback frequency band | 57Hz to 36kHz |
| internal volume | 2.8L |
| Amplifier section | |
| Rated output | Woofer: 30W, Tweeter: 20W |
| input terminal | XLR-3-31 type (No.2 HOT) (balanced) |
| Rated input level | -10dBV (TS phone) / +4dBu (XLR) GAIN SW 0dB |
| input impedance | 20kΩ min. |
| volume | – ∞ to 0dB |
| LO FREQUENCY (80Hz) | 0 / -2 / -4 / -6dB |
| Tweeter Level | 0 / -2dB |
| gain | 0 / +10dB |
| general | |
| External Dimensions | (W)120 × (H)189 × (D)157mm (excluding protrusions) |
| mass | Approx. 3.1kg |
| Power supply (AC IN) | 100 V to 50/60 Hz |
| Power consumption | 30W |
Frequency Response Chart
*Subject to change due to product improvements or modifications.