NEUMANN KH 420 A G Active Mid-Field Monitor

Active mid-field monitor

The NEUMANN KH 420 A G is an active mid-field monitor designed for a working distance of 1.5 to 3 m (5' to 9'). It handles this space effortlessly thanks to its large power reserves and extremely concentrated dispersion. Even in diverse acoustic environments, the NEUMANN KH 420 A G remains neutral and clear in every detail down to the subtlest nuances. No subtlety is lost; every sound element can be localized.
The NEUMANN KH 420 A G is a three-way tri-amplified monitor with thermally protected Class AB amplifiers (330 W and two times 140 W). Just like the drivers, the MMD™ (Mathematically Modeled Dispersion™) waveguide is designed for maximum precision. The precisely horizontally distributed sound ensures flexibility in listening position; the narrower vertical dispersion reduces the negative effects of nearby reflections, such as from a desk or mixing console. The dispersion of the NEUMANN KH 420 A G is intentionally designed to be narrower, to ensure reference sound at longer working distances.
The NEUMANN KH 420 A G is designed for midfield applications and as a main monitor in project, music, broadcast, and post-production studios for recording, mixing, and mastering. And in a multi-channel system, it can also be freely combined with all other Neumann studio monitors.
With its tri-channel amplifiers, the NEUMANN KH 420 A G unleashes sound pressure up to 122.4 dB. In doing so, it maintains a high-resolution and neutral representation across the entire frequency response. This also includes exceptional bass response down to 26 Hz. Despite the use of ports, there is no audible "boom" or resonance in the low-frequency range. And the transient response is precisely controlled at all times.
The computer-modeled chassis is constructed with LRIM™ materials, which eliminates standing wave resonances and suppresses intermodulation distortion, especially in the midrange.
For demanding highs, our specially developed special fabric dome ensures distortion-free reproduction. The fabric dome captures the midrange with maximum precision. Its ultra-light material and powerful neodymium magnet allow for significantly better transient response with significantly lower distortion compared to common midrange drivers.
The DIM 1 digital input module expands the speaker electronics with a digital XLR input, a digital BNC input, and a digital BNC output (192 kHz/24 bit) for flexible digital signal connections. With the delay function (adjustment range 0 - 400 ms) of the DIM 1, the audio signal can be delayed to ensure audio-visual synchronization (lip-sync). Furthermore, the high resolution of the delays (0.1 ms) allows for equalization of propagation delays. The delay can be added to all inputs (digital and analog).

Specifications

• Free field frequency response 1: 34 Hz - 20 kHz, ± 2 dB
• THD < 0.5 % at 1 m distance: 95 dB SPL
• Woofer amplifier, continuous power*: 340 W
• Midrange amplifier, continuous power*: 160 W
• Tweeter amplifier, continuous power*: 180 W
• Controller: Analog, active
• Crossover: 600 Hz/2.0 kHz
• Slope: 24 dB/Oct.
• Bass equalization: 0; -2.5; -5; -7.5 dB
• Midrange equalization: 0; -1.5; -3; -4.5 dB
• Treble equalization: 1; 0; - 1; -2 dB
• Parametric equalizer: with bypass
• Gain: + 4... -12 dB
• Frequency: 20 to 200 Hz
• Q: 1 to 8
• Protection circuit: Limiter: low, mid, high
• Driver: Magnetically shielded
• Woofer: 250 mm /10”
• Midrange: 76 mm /3”
• Tweeter: 25 mm /1”
• THD+N < 0.1% with limiter off
• Weight: 36 kg