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Neumann Large Midfield Monitor

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SKU: # 512330
Model: #

KH 420


Its size and configuration classify the KH 420 as a midfield or main monitor for greater listening distances or mastering applications. Like the KH 310, the KH 420 has a three-way design, with a large 3" midrange dome and a crossover at 2 kHz to a 1" treble dome for higher frequencies. Both domes were developed in-house by Neumann and are manufactured exclusively for the company. In its external appearance, the KH 420 is
a massive, heavy loudspeaker. The outstanding workmanship and attention to detail can be clearly seen and felt.

The KH 420 is particularly well-suited for use in music, broadcast, and post production studios for tracking, mixing, and mastering. The KH 420 can be used free-standing or flush mounted into a wall, and, in multichannel systems, can be mixed freely with other loudspeakers in the range.


  • Computer mechanically modeled three-way cabinet design using Low resonance Integral Molding (LRIM) materials

  • New in-house simulated magnetically shielded drivers

  • Powerful 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

  • Two-colour dimmable Neumann logo

  • Electronics panel with generously dimensioned integrated Accelerated Heat Tunneling (AHT) heat sink

  • Powerful 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.

  • Production consistency due to individual hand-alignment in final test

  • 4-position bass, low-mid and treble acoustical controls and easy to use parametric equalizer

  • Wide range input gain and output level controls

  • Ground lift

  • Optional (DIM 1) digital XLR/BNC inputs and buffered BNC output

  • Optional (DIM 1) lipsync delay (0 ... 10/12 frames)

  • Optional (DIM 1) time-of-flight delay (0 ... 400 ms)

  • Universal dual (bass and mid/treble) switched-mode power supplies (100 ... 240 V)


Frequency range: 25 Hz 22 kHz (6 dB)
Ripple: 2.7 dB (100 Hz 10 kHz)
Horizontal dispersion angle: 110 degrees (6 dB isobar 1 kHz 10 kHz)
Horizontal standard deviation: 9 degrees (6 dB isobar 1 kHz 10 kHz)
Vertical dispersion angle: 77 degrees (6 dB isobar 1 kHz 10 kHz)
Vertical standard deviation: 23 degrees (6 dB isobar 1 kHz 10 kHz)
Maximum SPL: 115.7 dB (3% THD 100 Hz 10 kHz)
Bass capability: 108 dB (10% THD 50 100 Hz)
Maximum SPL at 1 m (free-field) with EIA-426B signal at full output: 109 dBA Leq and 124 dB peak
Pair deviation: 0.24 dB (max. value 100 Hz 10 kHz)
Noise level (A-weighted): 18.3 dBA (distance 10 cm)
for the setting 100 dB/1 m at 0 dBu input
Power Requirements: 100~240 VAC, 50/60 Hz
Idle power consumption: 60 W
Full output power consumption: 800 W
Dimensions (WxHxD): 330 x 645 x 444 mm (13 x 17.5 x 25.4")
Weight: 35 kg (77.2 lb)
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