Neumann KH 420 – 3-Way Active Studio Monitor

The Neumann KH 420 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.

• 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
• Fully documented extensive mounting hardware options (hardware sold separately)

Neumann KH 420 Features

Acoustics:

• Frequency Response
  • 26 Hz to 22 kHz, +/-3 dB free field
  • 28 Hz to 20 kHz, +/-2 dB pass-band free field
• Self Generated Noise
  • < 20 dB(A) level at 10 cm
• THD
  • < 0.5 % at 95 dB SPL at 1 m, > 120 Hz
• SPL
  • 4/122.4 dB maximum in full space/half space at 3% THD at 1 m (averaged between 100 Hz and 6 kHz)
  • 9 dB maximum bass capability in half space at 3% THD at 1m (averaged between 50 Hz and 100 Hz)
  • 109 dB(C) maximum short term with IEC-weighted noise (IEC 60286-5) at 1 m, in typical listening conditions
  • 103 dB(C) maximum short term (full range) with music material at 2.3 m, in typical listening conditions (pair)
  • 90/96 dB(C) maximum long term (full range) with pink noise at 2.3 m, in typical listening conditions (single/pair)

Analog Input:

• 9 Hz; 18 dB/octave infrasonic filter frequency/slope
• XLR electronically balanced input
• 14 kOhms impedance, electrically balanced
• 0 dB to to15 dB input gain control (sensitivity)
• 94, 100, 108, 114 dB SPL output level control
• > 56 dB CMRR @ 100 Hz to 16 kHz
• +24 dBu maximum analog input level (18 dBu for analog delayed)

Electronics:

• Class AB Amplifiers, Continuous (Peak) Output Power
  • Bass: 295 W (330 W)
  • Midrange: 130 W (140 W)
  • Treble: 130 W (140 W)
• Controller Design:
  • Analog, active
• Crossover:
  • Frequencies: 570 Hz, 2 kHz
  • Slope: 24 dB/octave
• EQ:
  • Bass: 0, -2.5, -5, -7.5 dB
  • Mid: 0, -1.5, -3, -4.5 dB
  • High: 1, 0, -1, -2 dB
• Parametric EQ:
  • Status: Switchable
  • Gain: +4 to -12 dB
  • Frequency: Bypass, 25 to 80 Hz, 50 to 160 Hz, 100 to 320 Hz
  • Q: 1 to 8
• Protection Circuitry:
  • Excursion limiter: Low
  • Peak limiter: Low
  • Thermo limiters: Low, Mid and High
  • Overheat: Amplifiers
• Displays:
  • Power on: Neumann logo “White”
  • Limit/clip: Neumann logo “Red”

Mechanical:

• Cabinet:
  • Painted wood and polyurethane, metallic anthracite finish
  • Aluminum electronics panel, black
• Baffle:
  • Optional removable metal grille
• Temperature:
  • Operating: +50° to +104° F (+10 to +40° C), <90% RH non-condensing
  • Transport/storage: −13° to 158° F (−25° to +70° C) ,<90% RH non-condensing
• Magnetically Shielded Drivers:
  • Woofer: 10″ (265 mm)
  • Midrange: 3″ (76 mm)
  • Tweeter: 1″ (25 mm)
• Cabinet:
  • Design: Vented, dual ports on front panel
  • Mounting points: 8 x M5 on rear

Power Requirements:

• 100~240 VAC, 50/60 Hz
• Idle power consumption: 60 W
• Full output power consumption: 800 W

Dimensions (WxDxH):

• 13 x 17.5 x 25.4″ (330 x 444 x 645 mm)
• External volume: 3.3 ft3 (93 liters)

Weight:

• 77.2 lb (35 kg)

Packaging Info

• Package Weight: 92.4 lb
• Box Dimensions (LxWxH): 30.2 x 24.25 x 23.4″