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MOTU 1248 - Thunderbolt and USB Audio Interface With AVB Networking and DSP (32x34, 4 Mic)

BH #MA1248TBEIF • MFR #9300
MOTU 1248 - Thunderbolt and USB Audio Interface With AVB Networking and DSP (32x34, 4 Mic)
Key Features
  • Four Microphone Preamps With +48V
  • AVB Up to 256 Thunderbolt Channels
  • 48 Channel Software Mixer with DSP
  • Remote Control Using Web Application
The MOTU 1248 - Thunderbolt and USB Audio Interface With AVB Networking and DSP (32x34, 4 Mic) is designed for studio recording, installed sound, and live sound reinforcement applications such as mixing a band in a club or music venue. The 1U 19" rackmountable device features four balanced microphone inputs with individually switchable +48V phantom power, two dedicated hi-Z guitar inputs, 8 x 12 balanced analog with separate main and monitor outs, 2 x 8-channel ADAT optical, and RCA S/PDIF (with sample rate conversion), for a total of 32 inputs and 34 outputs. Additional I/O can be added to the system through AVB networking.
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MOTU 1248 Overview

  • 1Description
  • 2Audio Quality
  • 366 Audio Channels
  • 4Universal Connectivity
  • 5On-Board DSP With Mixing And Effects
  • 632-Bit Floating Point Processing
  • 7Modeled Vintage Effects Processing
  • 8System Expansion and Audio Networking
  • 9Matrix Routing and Splitting
  • 10256 Channels of Network Audio I/O To Host Computer
  • 11Web App Control
  • 12Stand-alone Mixing With Wireless Control
  • 13ADAT Digital I/O
  • 14Comprehensive Metering

The MOTU 1248 - Thunderbolt and USB Audio Interface With AVB Networking and DSP (32x34, 4 Mic) is designed for studio recording, installed sound, and live sound reinforcement applications such as mixing a band in a club or music venue. The 1U 19" rackmountable device features four balanced microphone inputs with individually switchable +48V phantom power, two dedicated hi-Z guitar inputs, 8 x 12 balanced analog with separate main and monitor outs, 2 x 8-channel ADAT optical, and RCA S/PDIF (with sample rate conversion), for a total of 32 inputs and 34 outputs. Additional I/O can be added to the system through AVB networking.

The audio interface utilizes ESS Sabre32 Ultra converters to provide a dynamic range of 123 dB (A-weighted 20 to 20,000 Hz) on balanced TRS analog outputs, a THD+N rating of -110 dB, and a total system latency of 32 samples (0.66 ms) while recording at up to 24-bit 192 kHz resolution. A front panel backlit 324 x 24 LCD provides detailed metering for all analog and digital I/O as well as provide a GUI for adjusting hardware settings.

Using Thunderbolt connectivity, the audio interface can stream 128 audio channels in and 128 channels out to the interface's physical outputs, the DSP-powered 48 digital routing matrix, or AVB audio network streams. The interface can also use high speed USB 2.0 (3.0 compatible) using class compliant drivers to work with most digital audio workstations.

The 48-channel digital mixer can mix physical inputs on the interface, audio channels from your host computer software, AVB audio network streams, or mixer outputs. It features seven stereo auxiliary busses, three groups, a reverb bus that can serve as an alternate 4th group, a main mix bus, and a separate monitor bus that can function as a solo buss.

The mixer includes 32-bit floating point precision DSP-powered models of three British analog console EQ profiles, a classic compressor module with optional peak/RMS operation, and a model of the legendary Telextronix LA-2A optical leveling amplifier with automatic gain control (AGC) characteristics. Each input channel strip features a high-pass filter, a gate, a four-band parametric EQ, and a compressor.

The device's digital routing matrix allows you to route any source signal such as an analog or digital interface input, computer channel, mixer bus output, or network stream to any destination such as an interface output, host software input, mixer input, or any other device (or computer) on the AVB network. A single input or stereo pair can also be split and sent to multiple destinations.

The first of its kind, this interface features an AVB Ethernet port that adopts the AVB industry networking standard for transporting high-bandwidth, low-latency audio and video over Ethernet. It was developed by the IEEE and enables connection to a second MOTU AVB audio interface (1248, 8M, or 16A) via a CAT-5E or CAT-6 Ethernet cable. The standard is open meaning it is not proprietary and will allow for open interoperability across different devices and brands.

The system can be further expanded through connection to a MOTU AVB Switch (sold separately), for five total devices and the capacity to stream over 512 channels on the network. Sixteen 8-channel network streams may be broadcast while simultaneously listening to sixteen 8-channel network streams. The AVB network provides its own network-wide time base for phase locking all connected devices and also allows one of the connected devices to be assigned as the master clock. An added benefit of the AVB network standard is the automatic device discovery for self-configuration, 100 meter cable runs, as well as the system's Stream Reservation Protocol which provides guaranteed Quality of Service (QoS) and an uninterrupted point-to-point network connection.

The audio interface's on-board DSP, mixing, device settings, and network audio routing can all be controlled through a web application running on a web browser from a laptop, tablet, or smartphone connected by wire or Wi-Fi to your local area network. This allows the interface to be controlled using Mac, Windows, Linux, iOS, and Android devices provided they share the same network. By connecting an Apple Airport or other Wi-Fi router directly to the interface with a standard Ethernet cable, the mixing and DSP controls of the interface can be managed using a Smartphone or tablet, without the need for a computer. This is useful for situations such as mixing live sound. A total of up to 12 independent stereo mixes can all be independently controlled by different engineers or musicians via Wi-Fi connected iPhones or iPads.

The device includes a collection of quick setup presets designed for different applications in the studio, on stage, or for installed sound such as a recording interface or network snake. Presets can be customized using the digital routing matrix as well as saved for future recall.

Audio Quality
Provides 123 dB dynamic range and a THD+N of -110 dB (0.0003%) at -1 dBFS, un-weighted, 1 kHz
66 Audio Channels
Features 4 mic inputs, 2 guitar inputs, 8 x 12 balanced analog with dedicated main and monitor outs, 2 x 8-channel ADAT optical, RCA S/PDIF (with SRC), and two independent phone outs for a total of 32 inputs and 34 outputs
Universal Connectivity
Connects to computer with Thunderbolt or high-speed USB 2.0 (compatible with USB 3.0) with class-compliant firmware and industry standard drivers to work with any audio software
On-Board DSP With Mixing And Effects
Provides flexible 48 input digital mixer modeled after large format mixing consoles with 12 stereo busses and DSP effects including reverb, 4-band EQ, gate, and compression
32-Bit Floating Point Processing
Provides ample headroom for mixing and effects DSP
Modeled Vintage Effects Processing
Provides classic reverb, compression modeled after historic LA-2A compressor, and EQ modeled after analog console EQs
System Expansion and Audio Networking
Allows you to add a 2nd MOTU AVB interface (1248, 8M, or 16A) with a Cat-5e or Cat-6 Ethernet cable and up to five devices using a MOTU AVB Switch (sold separately). Multiple interfaces can be networked together with over 100 meter cable runs to stream audio between devices and computers on the network
Matrix Routing and Splitting
Provides flexible digital matrix routing and splitting for any analog or digital input, computer channel or network stream to any computer, output, or network devices. A single input can be split to multiple output destinations
256 Channels of Network Audio I/O To Host Computer
Allows monitoring and recording of up to 128 network audio channels in and 128 network channels out through a Thunderbolt connection to a host computer
Web App Control
Controls on-board DSP, mixing, device settings, and network audio routing from web app software running in a web browser on a computer, laptop, tablet, or Smartphone connected by a wire or Wi-Fi to your local area network
Stand-alone Mixing With Wireless Control
Allows you to connect an Apple Airport or other Wi-Fi router directly to the audio interface with a standard Ethernet cable and control the device's mixing and DSP effects from a Smartphone or tablet, without a computer such as in live sound mixing applications
ADAT Digital I/O
Allows connection of outboard digital processors, digital mixers or other gear, 16 channels at 44.1/48 kHz or 8 channels at 88.2/96 kHz
Comprehensive Metering
Features large backlit 324 x 24 LCD that allows you to view all signal activity at a glance with detailed metering of analog and digital I/O, as well as access to hardware settings from font panel GUI

MOTU 1248 Specs

Key Specs
Channels of I/O
32 Input / 34 Output at 48 kHz
24 Input / 26 Output at 96 kHz
14 Input / 16 Output at 192 kHz
Maximum Sampling Rate
192 kHz / 24-Bit
Number of Microphone Inputs
4 Preamps
Analog Audio I/O
2x 1/4" TRS Hi-Z Input
8x 1/4" TRS Balanced/Unbalanced Line Input
4x XLR 3-Pin Mic Input
12x 1/4" TRS Balanced Line Output
2x 1/4" TRS Headphone Output
Digital Audio I/O
1x RCA Coaxial S/PDIF Input
1x RCA Coaxial S/PDIF Output
2x TOSLINK Optical ADAT Input (S/MUX Support)
2x TOSLINK Optical ADAT Output (S/MUX Support)
Host Connection
1x Thunderbolt/Mini DisplayPort
1x USB-B (Class-Compliant)
OS Compatibility
macOS 10.8 or Later
Windows 10 or Later
Power Requirements
AC/DC Power Adapter (Included)
Channels of I/O
32 Input / 34 Output at 48 kHz
24 Input / 26 Output at 96 kHz
14 Input / 16 Output at 192 kHz
Built-In DSP
Yes
Maximum Sampling Rate
192 kHz / 24-Bit
Number of Microphone Inputs
4 Preamps
Built-In Microphone
No
Input Level Adjustment
6x Knob
Expansion Slots
No
Signal Processing
Gain/Trim Range
Headphone Outputs:
128 dB
Line Inputs:
+2 to +24 dBu
Line Outputs:
-4 to +20 dBu
Mic Inputs:
0 to +63 dB
High-Pass Filter
No
Solo/Mute
No
Connectivity
Analog Audio I/O
2x 1/4" TRS Hi-Z Input
8x 1/4" TRS Balanced/Unbalanced Line Input
4x XLR 3-Pin Mic Input
12x 1/4" TRS Balanced Line Output
2x 1/4" TRS Headphone Output
Phantom Power
48 V (on 4 Channels)
Digital Audio I/O
1x RCA Coaxial S/PDIF Input
1x RCA Coaxial S/PDIF Output
2x TOSLINK Optical ADAT Input (S/MUX Support)
2x TOSLINK Optical ADAT Output (S/MUX Support)
Host Connection
1x Thunderbolt/Mini DisplayPort
1x USB-B (Class-Compliant)
Host Connection Protocol
Thunderbolt 2
USB 2.0
Sync I/O
1x BNC Word Clock Input
1x BNC Word Clock Output
Network I/O
1x RJ45 AVB
MIDI I/O
No
Performance
Maximum Input Level
Inputs:
+24 dBu
Line Inputs:
+24 dBu
Mic Inputs:
+24 dBu (with Pad)
Maximum Output Level
Line Outputs:
+20 dBu (Balanced)
Headphone Output Power
80 mW (Max)
Dynamic Range
Outputs:
108 dBA
Line Inputs:
117 dBA
Line Outputs:
123 dBA
Mic Inputs:
118 dBA
THD+N
Headphone Outputs:
-100 dB
Line Inputs:
-110 dB
Line Outputs:
-110 dB
Mic Inputs:
-110 dB
Digital Audio
Sample Rates
44.1 / 48 / 88.2 / 96 / 176.4 / 192 kHz
Sample Rate Conversion
No
Sync Sources
Word Clock
Clocking
Internal:
Compatibility
OS Compatibility
macOS 10.8 or Later
Windows 10 or Later
Included Software
No
Included Plug-Ins
No
Processor Requirement
Mac:
1 GHz Intel
PC:
1 GHz Intel Pentium
RAM Requirements
2 GB, 4 GB Recommended
Storage Requirements
500 GB
Minimum Display Resolution
324 x 24
Required Hardware
Available Thunderbolt Port or USB 2.0 Port
Internet Connection
Required for Remote Control
Power
Power Requirements
AC/DC Power Adapter (Included)
AC Input Power
100 to 240 VAC, 50 / 60 Hz
Physical
Rackmount Size
1 RU
Packaging Info
Package Weight
7.95 lb
Box Dimensions (LxWxH)
23.5 x 11.4 x 5.3"

MOTU 1248 Reviews

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