NEUMANN MT 48 Audio Interface User Guide
- June 13, 2024
- Neumann
Table of Contents
NEUMANN MT 48 Audio Interface
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
Power
Controls
Inputs and outputs
Instruction manual
GEORG NEUMANN GMBH• LEIPZIGER STR. 112 • 10117 BERLIN • GERMANY
TEL +49 (0)30 / 41 77 24 -0 • FAX -50 •
[email protected] •
WWW.NEUMANN.COM