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KH 750 DSP D G


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Compact DSP-controlled closed cabinet subwoofer

  • Easily installed compact cabinet with a very deep bass response
  • DSP engine optimizes output to achieve reference class sound
  • Neumann.Control App for iPad® to setup, align and operate in a system

No cost emi available on all credit cards for 6,9 and 12 months


The compact KH 750 DSP is the ideal choice for smaller rooms and smaller studio monitors, such as the KH 80 DSP. It has a unique and flexible 2.0/0.1 Bass Manager allowing the subwoofer to be used in many different system configurations. On the back panel there are analog and digital inputs and outputs, four routing modes and adaptable acoustical controls to allow for seamless system integration. The Neumann.Control software gives access to many additional functions inside the subwoofer. The KH 750 DSP can be used in music, broadcast, and post production studios for tracking, mixing, and mastering.

The newly designed 10” long-throw driver has a large magnet, linear motor design and a very stiff pressed steel basket. As subwoofers are usually placed on the floor, a robust grille protects the driver from accidental damage. The well-braced cabinet is a sealed designed which brings the fastest possible transient response. The two analog XLR inputs are balanced as are the two analog XLR outputs. The 192 kHz / 24-bit digital input can accept AES3 and S/P-DIF signals. There is a bypassable standby function and the switch-off time can be adjusted in Neumann.Control.

Via standard IP networking, Neumann.Control gives access to many additional the functions of the KH 750 DSP Subwoofer. Systems of loudspeakers can be defined, from mono to 3D, aligned for a good in-room sound, and then operated centrally: Setup, Align, Operate. At last, you do not have to be an expert to optimally integrate this subwoofer into your system, even in a small room.

The Neumann.Control app for iPad® offers several features allowing you to setup, align and operate the KH 750 DSP and KH 80 DSP even in large setups up to 9 loudspeakers.

The key features are:

  • 1, 2, 4, 5, 7 and 9 loudspeakers and subwoofers
  • Identify loudspeakers and subwoofers on the network that are in the room
  • Assign the identified loudspeakers and subwoofers to positions in the room
  • Guided Alignment – a set of simple questions resulting a well-balanced sound. The Guided Alignment is a process where you are asked very simple questions about the room and the loudspeaker/subwoofer position, and then the app adjusts the response of each loudspeaker/subwoofer accordingly.
  • Manual Alignment – an 8-band fully parametric equaliser for expert users. In Manual Alignment expert users have complete freedom to adjust an 8-band parametric equalizer, levels and delays in each loudspeaker/subwoofer as they wish. Manual Alignment can also be used to edit Guided Alignments in a more detailed way.
  • System and alignment selection
  • Volume control, preset levels, dim, mute all
  • Groups, solos, mutes
  • Other system settings such as delay, standby level and logo brightness
  • System Requirements: iPad® with iOS® 10 or higher


  • Decreased the bass extension of the monitoring system
  • Increasing the maximum SPL of loudspeakers
  • Decreasing harmonic and intermodulation distortion of loudspeakers
  • Reproducing the LFE channel
  • Reproducing the “Sub” signal of a bass managed multichannel source
  • Working as an extension for KH line subwoofer systems
(1) Compact ultra stiff wooden cabinet
  • Tough painted finish and high density rubber isolating feet
  • Excellent self-damping properties leading to minimal cabinet resonances
  • No standing wave resonances inside cabinet
  • Tight bass sound due to very low group delay
(2) In-house modelled long-throw bass driver with Extremely Linear Force Factor™ (ELFF™) and robust built-in grille
  • Damping of break up modes brings low distortion at high sound levels
  • Extremely linear force factor provides low harmonic distortion even at high excursions
  • Reduced air noise and improved rocking modes
  • Grille protects against mechanical damage
(3) 2.0/ 0.1 Bass Management
  • Stereo and externally bass managed applications
  • Bypassable 4th order crossover for maximum compatibility with consumer reproduction systems
  • Allows main loudspeakers to play louder and with lower distortion
(4) Four routing modes
  • Stereo 80 Hz bass management
  • External bass management
  • LFE up to 120 Hz
  • LFE full range
(5) XLR electronically balanced analog inputs and outputs
  • Standard interfacing to professional equipment
  • Daisy chain output for subwoofer arrays
(6) Wide range input gain and output level controls
  • Easier interfacing with signal sources
8-position phase control, continuous low cut control and parametric equalizer
  • More control in various acoustical environments
  • Easy to correct room modes
(7) Universal switched-mode power supply (100 … 240 V)
  • One version works in any country and robust to poor quality mains supply
(8) Ground lift
  • Reduced noise in electrically noisy environments and overcomes ground loops
(9) Low heat dissipation amplifiers with large headroom and sophisticated protection circuitry
  • Improved transient response
  • Assured reliability and safety
Separate thermo limiter to protect the voice coil and power amplifier
  • Soft clip and excursion limiters
  • Increases system reliability
  • Allows extraction of the maximum performance from the system
(10) Digital input and output
  • 192 kHz, 24-bit conversion
  • BNC connector: AES3 and S/P-DIF signals
(11) Network connector using standard IP protocol and your existing network infrastructure
  • No additional special equipment needed
  • Loudspeaker system can be controlled via the Neumann.Control software
(12) Control function
  • Use the back panel controls or the control set defined by the Neumann.Control software
(13) Standby function
  • Reduces power consumption when product is not in use

More Features

  • 8 x full parametric equalizer incl. Lo-/Hi-Shelf and Low-/High-Pass, controllable via Neumann.Control -> Accurate and flexible alignment of the subwoofer in the room and within systems
  • Delay -> Lip-sync (100 ms): To align audio and video signals up to 2.5 frames at 50 Hz or 3 frames at 60 Hz -> Time-of-flight (2 x 20.8 ms): To compensate for listening distance differences up to 7.2 m (12 ft 5in)

Technical Data

THD+N: analog, digital

< -100 dB; < -90 dB

Free field frequency response ±6 dB

16 … 800 Hz

Free field frequency response ±3 dB

18 … 750 Hz

Reproduction accuracy between 50 Hz and 100 Hz: 100%, 80%, 50% of subwoofers produced


Self-generated noise at 10 cm (with input gain set to 100 dB SPL for 0 dBu)

<20 dB(A) SPL

Sine wave output with a THD < 0.5 % at 1 m in half space

95 dB SPL (>70 Hz)

Bass capability: Max. SPL in half space at 3% THD at 1m (averaged between 50 Hz and 100 Hz)

105.0 dB SPL

Max. long term SPL with pink noise at 2.3 m, in typical listening conditions (single / pair full range)


Max. long term SPL with pink noise at 2.3 m, in typical listening conditions (single / pair with subwoofer)


Analog input(s)

2 x XLR: analog electronically balanced

Analog input impedance

>13k Ohms

Max. input level

< +24 dBu

Common mode rejection ratio (CMRR)

> 56 dB @ 15 kHz

Crosstalk (1 kHz), level matching

< -90 dB; ±0.1 dB

Volume control

via Neumann.Control software

Volume control range; resolution

0 … -∞ dB; 0.1 dB

Analog dynamic range; THD+N

119 dB(A); <0.003% (-90 dB)

Signal routing modes

Right; External Bass Management; 2 x LFE

Analog output(s)

2 x XLR; analog electronically balanced

Input gain control (sensitivity)

+2 ... -12 dB

Output level control (output level in 1 m based on 0 dBu input level)

94; 100; 108; 114 dB SPL

Digital input(s)

BNC (75 Ω): AES3; S/P-DIF

Digital output(s)

BNC (75 Ω): AES3

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

Dynamic range A-D-A

>120 dB(A)

Dynamic range D-A

>123 dB(A)

Digital sensitivity

-18 dBFS = 100 dB SPL at 1 m


1.5 ms (A-D-A linear phase); 1.2 ms (D-A linear phase)

Delay: User adjustable delay range

0 ... 100 ms and 2 x 0 ... 20.8 ms

Delay: Resolution: time; distance

0.1 ms; 3.44 cm (1 3/8”)

Delay: Max. frames Audio-video synchronisation (lip sync)

2.5 (40 ms) frames; 3 (33 ms) frames

Delay: Time-of-flight maximum distance

2 x 7.16 m (23' 5")

Controller design

Digital; active

Crossover frequency

80 Hz fixed or 60 ... 100 Hz via Neumann.Control

Crossover slope

24 dB/oct; 4th order


0; 45; 90; 135 und 0/180 deg

Equalization: via Neumann.Control software

8 x full parametric IIR + low / high shelf global balance

FIR phase correction

For connected analog loudspeakers: Linear phase (170 Hz ... 16 kHz; +/- 45°)

Protection circuitry

Driver (thermo limiter); Electronics (temperature limiter); Amplifier (peak limiter, temperature limiter, temperature protection and overcurrent protection); Power supply (temperature limiter and overcurrent protection)

Infrasonic filter: frequency; slope

17.5 Hz; 12 dB/oct.

Remote control

Neumann.Control software via an RJ45 connector carrying standard IP data

Display: On; Normal Operation

Green LED

Display: Identification

Amber LED

Display: Limit / Clip / Errors / Protection /Boot Mute / Shut Down Mute


Display: Bass Management on

Green LED

Output power woofer amplifier (THD+N with limiter deactivated: 10%)

256 W

Mains Power Supply: input voltage; frequency

100-240V; 50/60 Hz

Power consumption (230 V / 100 V): Standby

<300 mW

Power consumption (230 V / 100 V): Idle

18 W

Power consumption (230 V / 100 V): Full output

410 W

In-rush current (Peak)

30 A @230 VAC


Disabled; 90 mins (default); user defined in software

Cabinet material

Wood cabinet, aluminum electronics panel

Cabinet surface finish; color (front / back)

Painted; metallic anthracite (RAL 7021) / black (RAL 9005)

Operating conditions

+10° C to +40° C (+50° F to +104° F); <90% RH, non-condensing

Transport/storage conditions

-25° C to +70° C (-13° F to 158° F); <90% RH; non-condensing


265 mm (10") with protecting black metal grille

Product dimensions (height x width x depth)

383 x 330 x 383 mm (15 1/8" x 13" x 15 1/8")

External net volume

48.4 liters

Product weight

19.5 kg (43 lbs)

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