NEUMANN KH 810 II AES67

Product overview

The NEUMANN KH 810 II AES67 is a reference-quality, DSP-controlled studio subwoofer for medium-sized rooms, with a long-throw 10" driver, a 7.1.4 / 0.1 bass manager and redundant AES67 audio-over-IP connectivity: bass extension down to 16 Hz with Neumann precision and a hub that feeds up to 11 studio monitors from the network.

The KH 810 II AES67 is the perfect complement to mid-sized Neumann studio monitors such as the KH 150 and KH 310. A novel ELFF™ (Extremely Linear Force Factor) driver design and intelligent protection limiters keep distortion exceptionally low even at maximum SPL. Combined with analog Neumann studio monitors such as the KH 310 or KH 420, it offers sufficient DSP power to align an entire stereo, surround or immersive system up to 7.1.4 via MA 1 Automatic Monitor Alignment (sold separately), optimising both frequency response and phase. In surround and immersive systems, analog and DSP-equipped Neumann speakers can be combined and room-aligned using MA 1 with Multichannel Extension (sold separately).

Key features

• Deep and powerful bass down to 16 Hz (±6 dB), 18 - 310 Hz (±3 dB)
• Long-throw 10" driver with ELFF™ technology and resonance-optimised baskets
• 7.1.4 / 0.1 bass management: 80 Hz, 24 dB/oct crossover for up to 11 main channels plus LFE
• MA 1 ready: room alignment of the subwoofer and connected analog and DSP KH line monitors
• Redundant AES67 audio over IP: 12 input channels, ST 2110, ST 2022-7, RAVENNA, NMOS
• Analog XLR inputs and outputs, 2 x Sub-D 25 outputs (11 channels), 7 x AES3 outputs (BNC)
• Illuminated Neumann logo as status display
• Novel 180 W power amplifier with excellent energy efficiency
• Universal switched-mode power supply (100 - 240 V), ground lift, auto standby

Next generation subwoofer

The KH 810 II AES67 improves on its predecessor in acoustic performance and adds new features. The in-house modelled long-throw driver damps break-up modes for low distortion at high levels, the extremely linear force factor keeps harmonic distortion low even at high excursions, and air noise and rocking modes are reduced. Soft clip, peak, thermo and excursion limiters protect the system and allow the maximum performance to be extracted.

Precision in every detail

As subwoofers are typically placed on the floor, robust grilles protect the driver from accidental damage. The ultra-stiff wooden cabinet with its tough painted finish and built-in rubber feet has excellent self-damping and no internal standing wave resonances, and its highly efficient front-ported bass reflex system is tuned for the tightest bass with inaudible port noise.

7.1.4 bass management

The main channels 1-3 and 5-12 are high-pass filtered (>80 Hz, 24 dB/octave) and passed to the outputs that feed the loudspeakers, while their bass component (<80 Hz, 24 dB/octave) is summed and played back by the subwoofer. The LFE signal on channel 4 is added unfiltered. This lets the main loudspeakers play louder and with lower distortion.

AES67 network and connectivity

Two RJ45 network ports offer redundant AES67 connectivity, fully compliant with broadcast standards such as ST 2110, ST 2022-7 redundancy and RAVENNA, with up to 12 input channels; a network connection is also used for control via MA 1. Two electronically balanced XLR inputs and outputs serve stereo operation, two Sub-D 25 connectors feed up to 11 analog output channels and seven AES3 outputs (BNC) connect up to 11 monitors digitally; the AES3 outputs also feed the S/P-DIF inputs of Neumann monitors via a BNC to RCA cable.

Applications

The KH 810 II AES67 excels in music, film scoring, broadcast and post-production studios for tracking, mixing and mastering: bass extension, a higher maximum SPL and lower distortion for the whole system, LFE playback, Plane Wave Bass Array™ set-ups and the upgrade of existing systems or their extension for immersive audio, as the interface between an audio-over-IP infrastructure and analog or digital KH line loudspeakers.

In the box

• 1 x KH 810 II AES67 subwoofer
• 4 x mains cables, black (EU/KR, UK, US and CN)
• 1 x safety guide
• 1 x supplement "Getting Started Quickly"

NEUMANN KH 810 II AES67: frequently asked questions

How many monitors can the KH 810 II AES67 manage?

Its bass manager handles systems up to 7.1.4: up to 11 main channels plus LFE, with analog and AES3 outputs for up to 11 studio monitors.

Which AES67 formats does it accept?

Up to 12 input channels at 24 bits and 44.1, 48, 88.2 or 96 kHz, packet times of 125 µs or 1 ms, multicast or unicast, with RAVENNA and NMOS IS-04 / IS-05 connection management and ST 2022-7 redundancy.

Does it need the MA 1 software?

No. It can be operated from the backplate in local mode. MA 1 Automatic Monitor Alignment (sold separately) adds room alignment of the subwoofer and the connected monitors, system-wide control and firmware updates; the Multichannel Extension is needed for multichannel systems.

Where can I buy the NEUMANN KH 810 II AES67 in India?

The NEUMANN KH 810 II AES67 is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.

Workflow 1: 7.1.4 immersive monitoring over AES67

Music, film and post-production rooms with an immersive loudspeaker set-up.

Connections

Setup

1. Assign L, R, C, LFE, surrounds and height channels as in the manual's channel table.
2. Connect the monitors to the matching analog or AES3 (BNC) outputs.
3. Feed the LFE on channel 4; it is added unfiltered to the bass of the main channels.
4. Align the system with MA 1 and its Multichannel Extension.

Tip: Channels 1-3 and 5-12 are high-passed at 80 Hz for the monitors and summed below 80 Hz into the subwoofer.

Workflow 2: Stereo monitoring with bass management

Producers and mix engineers with a pair of KH monitors.

Connections

Setup

1. Place the subwoofer against the front wall, ideally at ¼ or ¾ of the room width.
2. Connect source and monitors with balanced XLR cables.
3. Select local analog operation with the SETTINGS switch.
4. Listen and fine-tune, or align with MA 1.

Tip: Keep the subwoofer's front less than 0.8 m from the wall behind it.

Workflow 3: Digital connection of the monitors via AES3

Studios with Neumann monitors that have digital inputs.

Connections

Setup

1. Connect one BNC output to the first loudspeaker of each pair.
2. Chain the second loudspeaker of the pair from the first.
3. Connect the centre to CH. 3 / daisy chain.
4. Calibrate the levels and delays.

Tip: Each BNC output carries two channels (subframes A and B).

Workflow 4: Room alignment with MA 1

Engineers who want the whole system corrected for the room.

Connections

Setup

1. Connect the subwoofer to the network with a standard Ethernet cable.
2. Set the SETTINGS switch to NETWORK.
3. Run MA 1 Automatic Monitor Alignment (sold separately) and measure.
4. Settings stay stored in the subwoofer.

Tip: Switching back to a LOCAL position gives a quick A/B comparison with the factory setting.

Workflow 5: Redundant AES67 for broadcast

Broadcast and OB facilities with a redundant AoIP network.

Connections

Setup

1. Set the SETTINGS switch to LOCAL AES67 for the initial set-up.
2. Configure IP addresses, then select redundant mode (ST 2022-7) and reboot.
3. Configure the PTP profile and connection management (RAVENNA or NMOS).
4. Set sample rate and packet time and route the streams.

Tip: Keep the three interface addresses in different subnets.

Workflow 6: Subwoofer arrays via daisy chain

Larger rooms needing more low-frequency output.

Connections

Setup

1. Use non-redundant (switched) mode to daisy-chain the network signal.
2. Connect the BNC daisy chain between the subwoofers.
3. Place the subwoofers along the front wall as a Plane Wave Bass Array™.
4. Configure the array in MA 1 (network mode).

Tip: Several subwoofers along the front wall reduce side-wall standing waves.