Neumann KH 420

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. 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

• For safe use near magnetic storage media

• Robust against accidental physical damage

• Light weight dome has better transient response and less breakup modes than cone designs

• High power magnet reduces harmonic and intermodulation distortion

• Reduced air noise and improved rocking modes

• No coloration from organ pipe resonance

• More forgiving of diverse acoustical environments

• Freedom of movement across the mixing console

• Reduces reflections off the mixing console

• Dimmable for low lighting level conditions or behind the screen applications

• Repeatable acoustical settings after moving loudspeakers

• Dual supply improves transient response

• Mechanically compatible with O 410, KH 870 and O 870

• Easy advanced planning for installations

ACOUSTICS:

• 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 (input/output)

• Format XLR: AES3

• Impedance XLR, balanced: 110 (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,

• 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

OTHER:

• 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