Neumann KH 420 G 3-Way Midfield Active Studio Monitor

The KH 420 is a three-way tri-amplified monitor with thermally protected Class AB amplifiers (330 W and two times 140 W). Just like the drivers, its Mathematically Modeled Dispersion (MMD) waveguide is engineered for optimum precision. Sound distributed in a horizontally precise manner ensures flexibility in the listening position; the narrower vertical dispersion reduces the negative effects of nearby reflections for example from a desk or mixing console. The dispersion of the KH 420 is deliberately designed to be narrower, to guarantee reference sound at longer working distances.

Key Features

• Computer-modeled cabinet design using Low Resonance Integral Molding (LRIM) materials
• Extraordinary bass depth (26 Hz) with high sound pressure (122.4 dB)
• Precise dispersion in the midrange and high frequencies

Technical Specifications

Free field frequency response ±6 dB
25 Hz - 22 kHz
Free field frequency response ±3 dB
26 Hz - 22 kHz
Free field frequency linearity deviation between 100 Hz and 10 kHz
± 1.2 dB
Reproduction accuracy between 100 Hz and 10 kHz: 100%, 80%, 50% of loudspeakers produced
±0.78; ±0.36; ±0.22 dB
Self-generated noise at 10 cm (with input gain set to 100 dB SPL for 0 dBu)
<20 dB(A) SPL
Sine wave output with a THD < 0.5 % at 1 m in half space
95 dB SPL (>100 Hz)
Max. SPL calc. in half space at 3% THD at 1m (averaged between 100 Hz and 6 kHz)
116.4 dB SPL
Max. SPL in full space at 3% THD at 1m (averaged between 100 Hz and 6 kHz)
122.4 dB SPL
Bass capability: Max. SPL in half space at 3% THD at 1m (averaged between 50 Hz and 100 Hz)
109.9 dB SPL
Max. short term SPL with IEC-weighted noise (IEC 60268-5) at 1 m, in typical listening conditions
109 dB(C) SPL
Max. short term SPL with music material at 2.3 m in typical listening conditions (pair / full range)
103 dB(C) SPL
Max. short term SPL with music material at 2.3 m, in typical listening conditions (pair with subwoofer)
109 dB(C) SPL
Max. long term SPL with pink noise at 2.3 m, in typical listening conditions (single / pair full range)
90 / 96 dB(C) SPL
Max. long term SPL with pink noise at 2.3 m, in typical listening conditions (single / pair with subwoofer)
90 / 96 dB(C) SPL
Analog input(s)
XLR: analog electronically balanced
Analog input impedance
>14k Ohms
Max. input level
+24 dBu (DIM 1: 18 dBu for analog delayed)
Common mode rejection ratio (CMRR)
>56 dB @ 15kHz
Input gain control (sensitivity)
0 dB ... -15 dB
Output level control (output level in 1 m based on 0 dBu input level)
94; 100; 108; 114 dB SPL
Controller design
Analog; active
Crossover frequency
570 Hz and 2.0 kHz
Crossover slope
24 dB/oct; 4th order
Equalization: Bass
0; -2.5; -5; -7.5 dB
Equalization: Mid
0; -1.5; -3; -4.5 dB
Equalization: Treble
+1; 0; -1; -2 dB
Equalization: Parametric EQ: Gain
'+4 ... -12 dB
Mains Power Supply: input voltage; frequency
100-240V; 50/60 Hz
Power consumption (230 V / 100 V): Idle
60 W (+5W when DIM 1 fitted)
Cabinet material
Wood cabinet, polyurethane waveguide, aluminum electronics panel
Cabinet surface finish; color (front / back)
Painted; metallic anthracite (RAL 7021) / black (RAL 9005)
Operating conditions
+10° C to +40° C (+50° F to +104° F); <90% RH, non-condensing
Transport/storage conditions
-25° C to +70° C (-13° F to 158° F); <90% RH; non-condensing
Woofer
265 mm (10") with magnetic shielding
Midrange
75 mm (3") with magnetic shielding
Tweeter
25 mm (1") with protecting black metal grille
Mounting points
8 x M5 on rear panel
Product dimensions (height x width x depth)
645 x 330 x 444 mm (25 3/8" x 13" x 17 1/2")
External net volume
93 liters
Product weight
35.0 kg (77 lbs 3 oz) (+ 100 g (3 oz) with DIM 1 fitted)
Cabinet weight when electronics remote located
30.3 kg (66 lbs 13 oz) (+ 100 g (3 oz) with DIM 1 fitted)
Packed dimensions (height x width x depth), mm (inches)
775 x 610 x 590 mm (23 1/4" x 15" x 14 1/8")
Packed weight
41.0 kg (90 lbs 6 oz)
Packed cube
0.279 m