fully redundant AES67 audio-over-IP support (compatible with ST 2110, ST 2022-7, RAVENNA and DANTE®-generated AES67 streams)
Extended bass reproduction down to 16 Hz
flexible Bass manager for stereo, surround and immersive systems up to 7.1.4
seamless integration with MA 1 Automatic Monitor Alignment (optionally available)
Support of MA 1 Multichannel Extension also for analog KH-Line monitors
Two newly developed 10-inch long-throw woofers with ELFF technology
Very low distortion even at high levels
robustly constructed, resonance-optimized wooden enclosure with stable paint finish
bass reflex ports at the front for precise bass reproduction without flow noise
Analog XLR inputs and outputs for stereo operation
SUB-D25 connectors for multi-channel operation according to Tascam standard
digital AES3 connections via BNC for up to 11 monitor channels
Local control on the device or via network using standard IP protocol
Choice between two independent operating and calibration modes
Network interface for control with the MA 1 software
Integrated protective circuits: Soft clip, peak, thermal and deflection limiters
Auto standby function for energy-efficient operation (can be deactivated)
Protective grille in front of the drivers to protect against damage
Powerful Bass for professional applications
The Neumann KH 870 II AES67 is a DSP-controlled reference subwoofer that has been specially developed to meet the requirements of modern recording studios. With its extended bass response down to 16 Hz and a maximum sound pressure level of 115 dB SPL, it delivers an impressive combination of depth, precision and performance. This makes the KH 870 II AES67 perfect for music production, film, broadcast and post-production.
Next Generation Performance
Compared to its predecessor, the KH 870 II offers significantly improved acoustic performance. Two newly developed 10-inch long-throw woofers with Extremely Linear Force Factor™ (ELFF™) technology minimize distortion even at the highest levels.
Multichannel bass management and flexible connection options
Thanks to its multichannel bass manager, the Neumann KH 870 II AES67 can be flexibly integrated into stereo, surround and immersive setups up to 7.1.4. Up to 12 analog inputs and 11 outputs are available via analog XLR inputs and outputs as well as SUB-D25 connections according to the Tascam standard. In addition, digital AES3 BNC interfaces provide additional flexibility, allowing up to 11 monitors to be integrated. With its redundant AES67 network connections, the KH 870 II AES67 is ideally equipped for modern studio infrastructures. It supports standards such as ST 2110, ST 2022-7 redundancy and RAVENNA, is compatible with DANTE®-generated AES67 streams and offers up to 12 network audio channels. It acts as a hub that receives multichannel audio and distributes it to connected monitors.
DSP control and room correction
The DSP architecture enables precise control and seamless integration via the separately available MA 1 Automatic Monitor Alignment software. This allows not only the frequency response, but also the Phase to be perfectly adapted to the room. Analog Neumann monitors such as the KH 310 or KH 420 can also be integrated via the MA 1 Multichannel Extension - a great advantage for hybrid setups. For quick adjustment, the subwoofer also offers two independent control modes: locally on the device or via the network.
Robust design for maximum reliability
The enclosure is made of sturdy wood with a durable paint finish and integrated rubber feet. A robust front grille reliably protects the two bass drivers from mechanical damage. The optimized bass reflex system prevents disruptive flow noise and ensures particularly precise output of the lowest frequencies.
The subwoofer also features a sophisticated protection concept with soft clip, peak, thermal and excursion limiters as well as temperature monitoring. A ground lift switch prevents ground loops, while the auto standby function improves energy efficiency.
Technical data:
Free-field frequency response (±3 dB): 18 - 310 Hz
Free-field frequency response (±6 dB): 16 - 750 Hz
Self-noise (10 cm distance, at input gain 100 dB SPL for 0 dBu): ' 20 dB(A) SPL
Sine wave reproduction (THD ' 0.5 %, 1 m in half space): 95 dB SPL (33 - 200 Hz)
Maximum sound pressure in the calculated half-space (3 % THD, 1 m, averaged 50 - 100 Hz): 115 dB SPL
Acoustic principle: Bass reflex with front openings
Woofer: 2 × 265 mm (10") with metal grille cover
Output power woofer power amplifier (THD+N with deactivated limiter: 10 %): 360 W
Analog inputs:
2 × XLR, electronically balanced
1 × SUB-D25, 8 × electronically balanced
1 × SUB-D25, 4 × electronically balanced
Analog input impedance: ' 12 kΩ
Digital inputs:
1 × BNC (75 Ω) daisy chain in
Input gain control (sensitivity): +2 dB ... -12 dB
Analog outputs:
2 × XLR, electronically balanced
1 × SUB-D25, 7 × electronically balanced
1 × SUB-D25, 4 × electronically balanced
Digital outputs:
7 × BNC (75 Ω), 11 × Monitor Out
1 × daisy chain out
AES67 Audio-over-IP:
2 × Ethernet (RJ-45), redundant (100Base-TX)
Up to 12 network channels
24 bit / 44.1-96 kHz
Compatible with RAVENNA, NMOS IS-04/05, DANTE® streams
