The KH 420 from Neumann is a three-way active monitor designed for use as a mid-field or main monitor, and can be used free-standing or flush mounted into a wall. It is particularly well-suited for use in music, broadcast, and post production studios for tracking, mixing and mastering, and in multi-channel systems can be mixed freely with other loudspeakers in the range.
In-house computer optimized drivers, a waveguide featuring Mathematically Modeled Dispersion (MMD), flexible acoustical controls, various input options and an extensive mounting hardware range allow the KH 420 to be used in diverse acoustical conditions, with any source equipment, and in a wide variety of physical locations.
Features
Computer mechanically modeled three-way cabinet design using Low Resonance Integral Molding (LRIM) materials
In-house simulated magnetically shielded drivers
Alloy fabric dome tweeter with built-in grille
Fabric dome, neodymium magnet, midrange driver
Long throw bass driver with Extremely Linear Force Factor (ELFF) and flow optimized die cast basket
High-capacity flow-optimized bass reflex ports with pipe damped
Elliptical Mathematically Modeled Dispersion (MMD) waveguide, with wide horizontal and narrow vertical dispersion
Electronics panel with dimensioned integrated Accelerated Heat Tunneling (AHT) heat sink
Analog class AB amplifiers with large headroom and overheat limiting
Fast-acting independent thermo limiters for woofer, midrange dome and tweeter to protect the voice coils
Woofer soft clip and excursion limiters
Four-position bass, low-mid and treble acoustical controls and easy to use parametric equalizer
Wide range input gain and output level controls
Ground lift
Individual hand-alignment in final test
Specifications
Studio Monitor
| Monitor Type | Active 3-Way |
| Enclosure | Bass-Reflex, Shielded |
| Drivers | HF Driver: 1 x 1″ / 25 mm Tweeter MF Driver: 1 x 3″ / 76 mm Cone LF Driver: 1 x 10″ / 265 mm Woofer |
| Amplification | HF Amplifier: Class-AB Rated at 130 W / 140 W Peak MF Amplifier: Class-AB Rated at 130 W / 140 W Peak LF Amplifier: Class-AB Rated at 295 W / 330 W Peak |
Performance
| Frequency Range | 26 Hz to 22 kHz ± 3 dB |
| Frequency Response | 28 Hz to 20 kHz ± 2 dB |
| Maximum Sound Pressure Level (SPL) | 122.4 dB |
| Total Harmonic Distortion (THD) | 0.5% |
| Analog Input Sensitivity/Gain | +4 to -12 dB (Continuously Variable) |
| Self-Generated Noise | Less Than 20 dBA (at 3.93″ / 10 cm) |
| Protections and Limiting | Excursion Limiter, Peak Limiter, and Thermal Limiting |
Signal Processing
| EQ | 1 x LF Shelf: -7.5 to 0 dB (2.5 dB Increments) 1 x Mid Notch/Peak: -4.5 to 0 dB (1.5 dB Increments) 1 x HF Shelf: -2 to +1 dB (1 dB Increments) |
| Parametric EQ | -12 to +4 dB Between 25Hz and 80Hz, Q: 1 to 8 -12 to +4 dB Between 50Hz and 160Hz, Q: 1 to 8 -12 to +4 dB Between 100Hz and 320Hz, Q: 1 to 8 |
Crossover
| Crossover Frequency | Low-Pass: 570 Hz, 24 dB/Octave Slope High-Pass: 2 kHz, 24 dB/Octave Slope |
Connectivity
| Audio I/O | 1 x XLR Balanced Analog Input |
Power
| AC Input Power | 100 to 240 VAC, 50/60 Hz |
| Power Consumption | 60 W (Standby) 800 W (Maximum) |
Environmental
| Operating Temperature | 50 to 104°F / 10 to 40°C |
| Operating Humidity | 90% |
| Storage Temperature | -13 to 158°F / -25 to 70°C |
General
| Enclosure Material | Aluminum, Metal Grille, Wood |
| Mounting Points | 8 x M5 (Rear Panel) |
| Dimensions (W x H x D) | 13 x 25.4 x 17.5″ / 330 x 645 x 444 mm |
| Weight | 77.2 lb / 35.0 kg |
Packaging Info
| Package Weight | 92.4 lb |
| Box Dimensions (LxWxH) | 30.2 x 24.25 x 23.4″ |
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