Georg Neumann GmbH – Professional Monitoring
General Description
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 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.
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 |
116.4 / 122.4 dB SPL |
Bass capability: Max. SPL in half space |
109.9 dB SPL |
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) |
Max. long term SPL with pink noise at 2.3 m, in typical listening conditions (single/pair) |
90 / 96 dB(C) SPL (full range) |
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, |
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, |
Parametric Equalizer – Q |
1 … 8 |
Protection circuitry |
Excursion limiter: Low |
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 |
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 |
Accessories
Mounting on a floor stand(e.g. K&M 26750, 26735)
KH 420 + LH 41 + LH 28 + stand
KH 420 + LH 41 + LH 36 + LH 28 + stand
Mounting on a lighting stand
KH 420 + LH 41 + LH 29 + stand
KH 420 + LH 41 + LH 36 + LH 29 + stand
Mounting on subwoofer
KH 420 + LH 41 + LH 28 + pole + KH 870
KH 420 + LH 41 + LH 36 + LH 28 + pole + KH 870
KH 420 + LH 41 + LH 36 + LH 37 + KH 870
KH 420 + LH 41 + LH 37 + KH 870
Mounting on a wall
KH 420 + LH 42 + LH 45 + wall
Mounting off a ceiling
KH 420 + LH 42 + LH 43 + ceiling
KH 420 + LH 42 + LH 46 + ceiling
Mounting off a lighting or truss bar
KH 420 + LH 42 + LH 29 + G-clamp + bar
Other accessories
DIM 1, FKH 420, GKH 420 B, REK 4
* THD+N <0.1% with limiter deactivated
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. |