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Neumann KH 420 Active Studio Monitor

Active 3-way Mid-field Monitor
Part No: KH-420

The KH 420 has been designed for use as a mid-field or main monitor. It 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.

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£3,070.00 £2,558.33 ex VAT
 
Neumann

Product Description

Details

The KH 420 represents the result of using the latest techniques in acoustical, electronic and mechanical design to bring a new benchmark in audio reproduction quality. 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
  • 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-color 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)
  • Fully documented extensive mounting hardware options
  • Optional robust metal grille
  • Optional transportation accessories

Specifications

Additional Information

Specification

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

What's in the box

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

User Manual

Reviews