Roland M-48

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Live Personal Mixer

The breakthrough personal mixing & monitoring solution
The M-48 is the next generation live personal mixer that offers musicians the flexibly to control exactly what they want to listen to during their performances. It provides the highest level of sound monitoring quality for both headphones and IEMs (In-Ear Monitors) as well as for wedge and powered monitors. The superb sound quality creates the ideal monitoring environment for live performance and recording as well as studio applications.


  • Choose from 40 audio sources and assign to 16 stereo groups
  • Sweeten your mix using built-in reverb, limiter, EQ, pan, and volume
  • Control, save, recall users settings from V-Mixer or PC with control software
  • Multitude of input and output connections along with ambient microphone
  • REAC embedded power provides clean flexible stage setup

Unprecedented Personalization
The M-48 enables control of up to 40 audio channels via 16 stereo groups. No longer do you have to share the same sources and in the same order as everyone else. Each musician can choose what he or she wants to listen to - a truly personal mix.

Professional Sound Control and Quality
Sweeten your monitor mix to your exact preferences with volume, pan, 3-band EQ and built-in reverb per group ?all instantly adjustable by convenient encoder knobs. A limiter is incorporated for protecting your ears from sudden and dangerous volume spikes. Based on REAC, the all-digital connection results in a low noise floor, improved musicality and crystal clear sound.

Unparalleled Usability
The LED indicators on the control knobs enable instant adjustment and visual confirmation at a glance, even on a dark stage. The built-in ambient mic aids in communicating with other musicians without have to remove your ear-buds or headphones as well as enabling a stage/room feel if desired. The AUX Input allows a metronome or other device to be mixed into the primary sound.

Convenient Connectivity
Our newly developed "REAC Embedded Power" (via the S-4000D) transfers both power and 40 channels of audio to the M-48 via a single CAT5e cable dramatically simplifying wiring and stage layouts. Mini jack and 1/4 inch phone jack headphone outputs are provided. Balanced TRS line outputs support wedge or other types of powered monitors. An independent stereo output mini jack enables recording with superb sound quality.

A Complete Digital Mixing System with any V-Mixer
With any V-Mixer Live Mixing Console you can setup, maintain and control 40 channels of monitor output to each M-48 connected to the system. All V-Mixers are equipped with the remote management software, memory recall, etc. providing a simple and flexible setup.

Connect to an existing Analog/Digital Console

With an existing console, connect the M-48 along with the S-1608 (16 channel) or the S-4000S (40 channel) Digital Snake to utilize the complete system. For a digital consoles, use the S-MADI REAC MADI Bridge to maintain the digital connection between the console and the M-48s. The next generation of digital monitoring can be incorporated along with your existing mixing system.

Setup and Manage the M-48 on your PC

M-48's can be setup and controlled on your PC when using with an existing console. Simply connect to the serial port on the S-1608/S-4000S series Digital Snakes or S-MADI.

Included Mounting Plate
The M-48 can be attached to the top of a microphone stand by using the bundled mounting bracket. The mounting bracket is also designed with a removeable headphone hanger and accessory tray for your pencil or portable recorder. The optional APC-33 mounting bracket can be used when you need to mount the M-48 to the middle of a music or mic stand.

S-4000D - The REAC Splitter Equipped with Embedded Power
"REAC Embedded Power" is unique Roland technology that enables the transfer of not only the digital audio signal but also the power required by the connected device - all via one CAT5e cable. The S-4000D Splitter and Power Distributor is equipped with 10 REAC ports including 8 ports of REAC Embedded Power. The S-4000D can automatically detect and distinguish a product not supporting REAC Embedded Power. In this case, power is not provided allowing the S-4000D to also function as a standard splitter when required. The S-4000D is required to use the M-48s.

Number of Input Channels

    43 (40 in, STEREO AUX in, 1 AMBIENT MIC in)
Number of Output Channels
AD/DA Conversion
    Sample Rate: 96.0kHz or 48.0 kHz or 44.1 kHz
    Signal Processing: 24 bits
    *The sampling frequency of M-48 to be set automatically according to it of the REAC Master device.
Frequency Response
    PHONES jack (1,2): -4 dB / +0 dB (40 ohms load, PHONES ATT max, 150 mW)
    LINE OUT L/R jacks: -2 dB / +0 dB (20k ohms load, -6 dBu)
    * Sample Rate: 96.0 kHz
    * Input: S-1608 Input (Input sens: +4 dBu, 20 Hz to 20 kHz)
Residual Noise Level
    (PHONES ATT: Center, IHF-A, typ.)
    -88 dBu (All Knobs: Min)
    -87 dBu (PHONES Vol: Unity, AUX IN Vol: Max, Group control knob 1 to 16: Min)
    -86 dBu (PHONES Vol: Unity, AUX IN Vol: Min, Group control knob 1 to 16: Unity)
    -72 dBu (PHONES Vol: Max, AUX IN Vol: Max, Group control knob 1 to 16: Max)
    * Input 150 ohms terminate
    * Output Connector: PHONES jack
    * Sample Rate: 96.0 kHz
    * S-1608 Input Sens: +4dBu
Nominal Input Level
    AUX IN L/R jack: -16 dBu (Vol: Max)
Input Impedance
    AUX IN L/R jack: 10 K ohms
Non Clip Maximum Input level
    AUX IN L/R jack: +2 dBu
Nominal Output Level
    LINE OUT L/R jacks: -6 dBu (LINE OUT Vol: Unity, Load impedance: 10 k ohms)
    LINE OUT REC L/R jack: -12 dBu (LINE OUT Vol: Unity, Load impedance: 10 k ohms)
Output Impedance
    PHONES jacks (1, 2): 10 ohms
    LINE OUT L/R jacks: 600 ohms
    LINE OUT REC L/R jack: 1 k ohms
Recommended Load Impedance
    PHONES jacks (1, 2): 16 ohms or greater (Composition impedance of 1 and 2)
    LINE OUT L/R jacks: 10 k ohms or greater
    LINE OUT REC L/R jack: 10 k ohms or greater
Non Clip Maximum Output level
    PHONES jacks (1, 2): 250 mW + 250 mW (1 or 2, 1 kHz, 40 ohms load)
    LINE OUT L/R jacks: +12 dBu (1 kHz, 10 k ohms load)
    LINE OUT REC L/R jack: +6 dBu (1 kHz, 10 k ohms load)
    REAC port: RJ-45 EtherCon type
    AUX IN L/R jack: Stereo miniature phone type
    LINE OUT L/R jacks: 1/4 inch TRS phone type
    LINE OUT REC L/R jack: Stereo miniature phone type
    PHONES jacks: Stereo miniature phone type and Stereo 1/4 inch phone type
Power Supply
    DC +48 V (It is supplied by S-4000D.)
Power Consumption
    13 W
Size and Weight

    297.0 (W) x 171.0 (D) x 67.0 (H) mm
    11-3/4 (W) x 6-3/4 (D) x 2-11/16 (H) inches
    1.5kg / 3 lbs 5 oz (M-48)
    0.6kg / 1 lb 6 oz (Mounting bracket and bracket tray)
Operation Temperature
    0 to +40 degrees Celsius
    +32 to +104 degrees Fahrenheit
Accessories (Included)
    Mounting bracket/bracket tray x 1
    Mounting bracket attachment kit
    Wing nut: for 3/8 inch screw x 1
    Washers: for 3/8 inch screw x 2
    Nut: for 5/8 inch screw x 1
    Rubber washer x 1
    Screws for fastening the M-48 x 2 Screws for attaching the APC-33 all purpose clamp x 4
    Ferrite core x 1
    REAC connector cover x 1
    Owner's Manual

Mixer Specifications
Mixer Type Digital
Total Channels 43
Mic Channels 0
Effects Yes
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