Neumann KH 420

Acoustics

−3 dB free field frequency response

26 Hz - 22 kHz, ± 3 dB

Pass band free field frequency response

28 Hz - 20 kHz, ± 2 dB

Self generated noise level at 10 cm

< 20 dB(A)

Total harmonic distortion < 0.5 % at 95 dB SPL at 1 m

> 120 Hz

Max. SPL in full space / calc. in half space
at 3% THD at 1m

116.4 / 122.4 dB SPL
(averaged between 100 Hz and 6 kHz)

Bass capability: Max. SPL in half space
at 3% THD at 1m

109.9 dB SPL
(averaged between 50 Hz and 100 Hz)

Max. short term SPL with IEC-weighted noise (IEC 60286-5) 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)

103 dB(C) SPL (full range)
109 dB(C) SPL (with subwoofer)

Max. long term SPL with pink noise at 2.3 m, in typical listening conditions (single/pair)

90 / 96 dB(C) SPL (full range)
90 / 96 dB(C) SPL (with subwoofer)

Analog Input

Infrasonic filter: frequency/slope

9 Hz; 18 dB/oct

Input

XLR, electronically balanced

Impedance, electrically balanced

14k Ohms

Input gain control (sensitivity)

0 dB to −15 dB

Output level control

94, 100, 108, 114 dB SPL

CMRR

> 56 dB @ 100 - 16 kHz

Max. analog input level

+24 dBu (18 dBu for analog delayed)

Digital Input (when optional DIM 1 accessory is fitted)

Format BNC

AES3, S/P-DIF

Impedance BNC, unbalanced

75 Ω (input/output)

Format XLR

AES3

Impedance XLR, balanced

110 Ω (input)

Input switching

Analog, Digital A, Digital B, Digital A+B (all available with and without delay)

Digital converter: resolution, design

16 … 24-bit DAC, Δ∑

Digital converter: sampling rate

22.05, 24, 32, 44.1, 48, 64, 88.2, 96, 176.4, 192 kHz

Digital sensitivity

−18 dBFS = 100 dB SPL at 1 m

A-D-A, D-A dynamic range

>116 dB(A), >123 dB(A)

THD+N: analog delayed, digital

< -104 dB, < -106 dB

Maximum Audio-Video/lip sync and Time-of-Flight delay

409.5 ms/ 140.87 m (462' 2")

Audio-Video/lip sync max. frames

10.2 (40 ms) frames,
12.3 (33 ms) frames

Resolution: time/distance

0.1 ms / 3.4 cm (1 3/8”)

Latency D-A (A-D-A)

0.22 - 1.85 ms (0.54 ms)

Delay setting acknowledgement

Neumann logo “Red” 1 flash

Delay setting acknowledgement

Neumann logo “Red” continuous flashes

Mains Power Supply, voltage; frequency

100-240 V~; 50/60 Hz

Electronics

Bass / Midrange / Treble Class AB amplifiers, cont. (peak) output power*

295 W (330 W) / 130 W (140 W) / 130 W (140 W)

Controller design

Analog, active

Crossover - Frequencies

570 Hz / 2 kHz

Crossover - Slope

24 dB/oct

Equalization - Bass

0; -2.5; -5; -7.5 dB

Equalization - Mid

0; -1.5; -3; -4.5 dB

Equalization - High

1; 0; -1; -2 dB

Parametric Equalizer

Bypassable

Parametric Equalizer - Gain

+4 ... -12 dB

Parametric Equalizer - Frequency

Bypass, 25 ... 80 Hz, 50 ... 160 Hz,
100 ... 320 Hz

Parametric Equalizer - Q

1 ... 8

Protection circuitry

Excursion limiter: Low
Peak limiter: Low
Thermo limiters: Low, Mid and High
Overheat: Amplifiers

Displays, indicators - power on

Neumann logo “White”

Displays, indicators - limit / clip

Neumann logo “Red”

Mains Power Supply, voltage; frequency

100-240 V~, 50/60 Hz

Power consumption - idle

60 W (+5 W when DIM 1 fitted)

Power consumption - full output

800 W

Mechanics

Cabinet surface finish, colour

Painted wood and polyurethane,  metallic anthracite. Aluminum electronics panel, Black.

Baffle cover

Optional removable metal grille

Operating conditions

+10° C to +40° C (+50° F to +104° F), <90% RH, non-condensing

Transport/storage condition

−25° C to +70° C (−13° F to 158° F), <90% RH, non-condensing

Drivers

Magnetically shielded

Woofer

265 mm (10")

Midrange

76 mm (3")

Tweeter

25 mm (1")

Cabinet design

Vented, dual ports on front panel

Mounting points

8 x M5 on rear

Product dimensions
(height x width x depth), mm (inches)

645 x 330 x 444 mm (25 3/8" x 13" x 17 1/2")

External volume

93 liters

Product Weight

35 kg (77 lbs 3 oz) (+ 100 g (3 oz) when 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 and cube

41.0 kg (90 lbs 6 oz), 0.279 m³

Delivery includes

1x KH 420
3x Power cables (Euro, UK, USA)
1x Operating manual
1x Getting Started Quickly Guide

Tender Description

KH 420 Active Midfield MonitorThree-way tri-amplified monitor with thermally protected 140 + 140 + 330 W remotable class AB-amplifiers. Magnetically shielded 1" alloy fabric dome tweeter, 3" soft dome midrange and 10” woofer. Computer mechanically modeled three-way cabinet design using MDF and Low Resonance IntMolding™ (LRIM™) materials with field-rotatable waveguide integrated into the front baffle. 14 kOhm electronic-balanced input on XLR-F with ground lift and optional 24-bit, 192 kHz digital input module with XLR and BNC inputs and a BNC buffered output for daisy chaining. Accepts AES3 and S/P-DIF formats. Built-in delay for time-of-flight and lip-sync adjustment. Fourth-order crossover, and four-position "Bass", "Mid", "Treble" and parametric EQ acoustical controls. Independent low/mid/high, peak and excursion limiter operation indicated on the front panel display. Maximum SPL is 122.4 dB at 1 m (3% distortion), pass band frequency response 26 Hz - 22 kHz (-3 dB). Self-generated noise level <0 dB(A) at 1 m. Cabinet external volume 93 liters, dimensions 645 x 330 x 444 mm (25 3/8" x 13" x 17 1/2"), and weight 35.0 kg (77 lbs 3 oz). Eight M5 threads on rear panel for attaching to our mounting hardware. Optional metal grille and flight case. Color: metallic anthracite.

Dealer Description

 Neumann KH 420 - Active Studio MonitorThe KH 420 is designed for use as a mid-field or main monitor in stereo and multi-channel systems. It can be used in project, music, broadcast centers, and post production studios for tracking, mixing, and mastering.

The KH 420 three-way analog active studio monitor features a Mathematically Modeled Dispersion™ Waveguide (MMD™), flexible acoustical controls, various input options, analog class-AB amplifiers, and an extensive range of mounting hardware. This allows the loudspeaker to be used in diverse acoustical conditions, with any source equipment and in a wide variety of physical locations. The KH 420 represents the latest in acoustic and electronic simulation and measurement technologies to ensure the most accurate sound reproduction possible.