NEUMANN MT 48 Audio Interface User Guide

June 13, 2024
Neumann

NEUMANN MT 48 Audio Interface

NEUMANN-MT-48-Audio-Interface-product

Product Information

The product is a versatile audio interface that offers multiple inputs and outputs, as well as various connectivity options. It features high-quality components and advanced technology to ensure excellent audio performance.

Line Inputs

There are four line inputs on the device. Inputs 1 and 2 are combination inputs that accept both XLR and TRS connectors. Inputs 3 and 4 are designed for instruments or high-impedance signals, but can also be used for line-level signals.

Dynamic Range

  • Maximum dynamic range (A-weighted, typ.) with a reference level of +24 dBu: 138.5 dB
  • Maximum dynamic range (A-weighted, typ.) with a reference level of +18 dBu: 135 dB

Output Level

  • Maximum output level (differential/single-ended) with a reference level of +24 dBu: +24 dBu
  • Maximum output level (differential/single-ended) with a reference level of +18 dBu: +18 dBu

Frequency Response

The frequency response of the device is within the following ranges:

  • +0/-0.2dB @ fs = 48 kHz
  • +0/-3dB @ fs = 96 kHz
  • +0/-3dB @ fs = 192 kHz

THD+N

  • THD+N at 1 kHz and 0 dBFS: < -105 dB (0.0006%)
  • THD+N at 1 kHz and 0 dBFS: < -112 dB (0.0003%)

Input/Output Connectors

The device offers various input/output connectors, including XLR, TRS, RJ-45, and USB-C. These connectors allow for different types of audio connections and data transfers.

Power Supply

The product can be powered through a USB-C 2.0 high-speed interface, compatible with USB 2.0 or higher ports. It also supports Power over Ethernet (PoE) technology for convenient power delivery.

Dimensions and Weight

  • Dimensions: [insert dimensions]
  • Weight: [insert weight]

Product Usage Instructions

1. Line Inputs

To connect line-level signals, instruments, or high-impedance signals to the device, use the combo locking Neutrik XLR/TRS connectors on Inputs 1-4. Inputs 1 and 2 are combo inputs, while Inputs 3 and 4 are specifically designed for instruments or high-impedance signals.

2. Dynamic Range and Output Level

The device offers a high dynamic range for accurate and detailed audio reproduction. The maximum output level can be adjusted using the gain controls on the device.

3. Frequency Response

The device provides a flat frequency response within the specified ranges at different sample rates. This ensures accurate \ audio reproduction across the entire frequency spectrum.

4. THD+N Performance

The product has low total harmonic distortion plus noise (THD+N) levels, resulting in clean and distortion-free audio signals.

5. Input/Output Connectors

Use the various input/output connectors on the device to connect different audio sources and devices. XLR, TRS, RJ-45, and USB-C connectors are available for different types of audio connections and data transfers.

6. Power Supply

The device can be powered through a USB-C interface by connecting it to a USB 2.0 or higher port. Alternatively, it supports Power over Ethernet (PoE) technology, allowing power to be delivered through the RJ-45 connector.

7. Dimensions and Weight

The device has specific dimensions and weight. Refer to the product specifications for accurate measurements.

Specifications

Specifications Microphone Inputs 1 – 2 (Combo)

Connector type Combo locking Neutrik XLR / TRS
Dynamic range Mic / Mic Lift                                              136 dB / 129 dB (A-weighted, typ.)
Max. input level Mic Pad -24 dB / Mic Pad -12 dB / Mic Pad o  +24 dBu / +12 dBu / +0 dBu
Frequency response +0/-0.2dB @ fs = 48 kHz                         9 Hz – 22 kHz
Frequency response +0/-3dB @ fs = 96 kHz                           9 Hz – 46 kHz
Frequency response +0/-3dB @ fs = 192 kHz                          11 Hz – 94 kHz
THD+N Preamp + A/D 1 kHz @ 0 dBFS                                  < -110 dB (0.0003%)
Interchannel crosstalk @ 1 kHz                                           < -130 dB
Equivalent input noise Mic / Mic Lift (150 Ω Source)                 < -125 dBu / -128 dBu (A-weighted, typ.)
Common mode rejection rate (20 Hz – 20 kHz)                       > 80 dB (up to 0 dBu)
Input impedance                                                           ~ 5 kΩ / ~ 10 kΩ (single-ended / di erential)
Gain range (Software controlled)                                        +66 dB
Gain step coarse / fine 0.5 dB / 0.1 dB
Phantom power (software switchable per channel)                   +48 V
Phase reverse (software switchable per channel)                     Yes
Low cut filter (software switchable per channel)                      -12 dB/octave, 60 Hz
5° low-end in-channel Ø deviation pt: Mic                              < 10 Hz
Interchannel phase 10 Hz – 100 kHz                                    < ±0.5°
Specifications                                             Line Inputs 1 – 2 (Combo)                           Instruments / Hi-Z & Line Inputs 3 – 4
Connector type                                            Combo locking Neutrik XLR / TRS                 ¼” (6.3 mm) TRS female
Dynamic range                                            138.5 dB (A-weighted, typ.) (ref +24 dBu)| 135 dB (A-weighted, typ.) (ref +18 dBu)
Max. input level                                           +24 dBu| +18 dBu
Input impedance                                          ~ 5 kΩ / ~ 10 kΩ (single-ended / di erential)| ~ 1 MΩ / ~ 2 MΩ (single-ended / di erential)
Gain range (software controlled)                       +66 dB| +66 dB
THD+N Preamp + A/D 1 kHz @ 0 dBFS                 < -105 dB (0.0006%)| < -112 dB (0.0003%)
Interchannel crosstalk @ 1 kHz                         < -140 dB| < -150 dB
Sensitivity range for 0 dBFS (software contr.)        +24 dBu to -42 dBu| +18 dBu to -48 dBu
Common mode rejection rate (20 Hz – 20 kHz)      > 80 dB (up to 0 dBu)| > 70 dB (up to 0 dBu)
5° low-end in-channel Ø deviation pt:                 < 10 Hz| 2 Hz
Interchannel phase 10 Hz – 100 kHz                   < ±0.5°| < ±0.5°
Specifications                                             Outputs 1 – 2| Line Outputs 3 – 4
Connector type                                            Neutrik XLR male| ¼” (6.3 mm) TRS female
Dynamic range                                            123 dB (A-weighted, typ.)| 123 dBFS (A-weighted, typ.)
Max. output level (di erential/single ended)         +24 dBu (12.2 Vrms) / +18 dBu (6.1 Vrms)| +24 dBu (12.2 Vrms) / +18 dBu (6.1 Vrms)
Frequency response +0/-0.2dB @ fs = 48 kHz       6 Hz – 22 kHz| 6 Hz – 22 kHz
Frequency response +0/-3dB @ fs = 96 kHz          2 Hz – 46 kHz| 2 Hz – 46 kHz
Frequency response +0/-3dB @ fs = 192 kHz         2 Hz – 92 kHz| 2 Hz – 92 kHz
Output impedance                                        < 70 Ω| < 70 Ω
THD+N 1 kHz @ 0 dBFS                                   < -110 dB (0.0003%)| < -110 dB (0.0003%)
Output level matching                                   ±0.1 dB| ±0.1 dB
Attenuation range (software controlled)              -∞ dB to 0 dB| -∞ dB to 0 dB
Gain step / precision                                     0.5 dB / ±0.05 dB 0.5 dB / ±0.05 dB
Specifications                                             Headphones
Headphone sockets                                       2 independent ¼” (6.3 mm) TRS female stereo
Dynamic range (A-weighted, typ.) high / low         < -122 dB / – 117 dB
Max. output level high / low                            16 dBu / 8 dBu
Frequency response +0/-0.2dB @ fs = 48 kHz       6 Hz – 22 kHz
Frequency response +0/-3dB @ fs = 96 kHz          2 Hz – 46 kHz
Frequency response +0/-3dB @ fs = 192 kHz         2 Hz – 92 kHz
Output impedance                                        < 70 mΩ
THD+N 1 kHz @ 0 dBFS high / low                     < -108 dB (0.00039%) / < -110 dB (0.0003%)
Gain range (software controlled)                       -∞ dB to 0 dB
Gain step / precision                                     0.5 dB / ±0.05 dB
Specifications         Complementary I/O| Specifications           General Device
RAVENNA / AES67 Gigabit Ethernet – Standard RJ-45 socket| Top panel display Capacitive touch, TFT LCD 800 x 480 pixels
USB| USB-C 2.0 High speed interface up to 480 MB/s| Power supply|  USB-C – supports USB PD3.0 Revision 2.0 v1.3
 | compatible with USB 2.0 or higher port| Power consumption    < 25 W

Power over Ethernet IEEE 802.3at (PoE+) class 0 PoE standard   Dimensions 200 x 128 x 40mm

Built-in talkback mic Mono omnidirectional CMOS/MEMS membrane

technology

GPIO/MIDI in/out   ¼” (6.3 mm) TRS female| Weight                     950 g
Optical I/O              ADAT physical: 8 in / 8 out @ 44.1 kHz/48 kHz

4 in / 4 out @ 88.2 kHz/96 kHz

2 in / 2 out @ 176.4 kHz/192 kHz

| Temperature range      Operation: 5 – 40 °C (41 – 104 °F)

Storage: -40 – +70 °C (-40 – 158 °F)

Relative humidity|  ≤ 95 %, non-condensing @ 30 °C
S/PDIF physical: 2 in / 2 out up to 96 kHz|  Housing material         Premium machined and anodized aluminium

In the box

NEUMANN-MT-48-Audio-Interface-fig 1

Power

NEUMANN-MT-48-Audio-Interface-fig 2

Controls

NEUMANN-MT-48-Audio-Interface-fig 4

Inputs and outputs

NEUMANN-MT-48-Audio-Interface-fig
3

Instruction manual

GEORG NEUMANN GMBH• LEIPZIGER STR. 112 • 10117 BERLIN • GERMANY
TEL +49 (0)30 / 41 77 24 -0 • FAX -50 • HEADOFFICE@NEUMANN.COMWWW.NEUMANN.COM

References

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