Page 2 - Check the included Items
2 Introduction Check the included Items The following items are included with the M-48. Make sure that all of these items are present. If anything is missing, please contact your dealer. M-48 (main unit) Mounting bracket/bracket tray (1) Mounting bracket attachment kit Rubber washer (1) Wing nut: fo...
Page 3 - Main Features
3 Main Features ● The flexibility of 40-channel mixing with easy operation enabled by grouping The M-48 allows you to mix up to 40 channels of digital audio sent via REAC. You can individually adjust the level and pan of 40 source channels and then assign the 40 sources to 16 stereo groups for conve...
Page 4 - Table of Contents
4 Table of Contents Check the included Items ........................................................................................................................................................................................... 2Main Features .......................................................
Page 5 - USING THE UNIT SAFELY
5 USING THE UNIT SAFELY 002a ● Do not open or perform any internal modifications on the unit. ................................................................................................................................. 003 ● Do not attempt to repair the unit, or replace parts within it (except ...
Page 7 - IMPORTANT NOTES; Power Supply
7 IMPORTANT NOTES 307 ● Before connecting this unit to other devices, turn off the power to all units. This will help prevent malfunctions and/or damage to speakers or other devices. 351 ● Using the unit near power amplifiers (or other equipment containing large power transformers) may induce hum. T...
Page 8 - Panel Descriptions; Top Panel
8 Panel Descriptions Here you can select the layer for the groups that you want to operate. The button corresponding to the currently shown layer will light. [1-8] button Selects groups 1–8. [9-16] button Selects groups 9–16. * If the button of the layer not shown is blinking, this means that Solo i...
Page 10 - Rear Panel
Panel Descriptions 10 [ATT] knob This adjusts the final output level of the headphones. Normally, you should use the top panel PHONES [VOLUME] knob to adjust the headphone output level. Use the [ATT] knob to adjust the output level appropriately for the sensitivity of the headphones you’re using. ☞ ...
Page 11 - Installation; Placing the M-48 on a Desk at an Angle
11 Installation By attaching the included mounting bracket to the M-48, you can place it on a desk at a convenient angle. * Spread a soft cloth or similar material under the mounting bracket so that the bracket does not scratch the surface on which it is placed. 1 Remove the two fastening screws ind...
Page 12 - If Your Mic Stand has 3/8 inch Threads
Installation 12 • Wing nut x 1 (included) • Washers x 2 (included) • Rubber washer x 1 (included) • Screws for fastening the M-48 x 2 (included) 1 Attach the mounting bracket to the mic stand. Attach the washers, mounting bracket, and other parts to your mic stand in the order – shown in the illustr...
Page 13 - If Your Mic Stand has 5/8 inch Threads
Installation 13 • Nut x 1 (included) • Rubber washer x 1 (included) • Screws for fastening the M-48 x 2 (included) 1 Attach the mounting bracket to the mic stand. Attach the rubber washer, mounting bracket, and other parts to your mic stand in the order – shown in the illustration. 2 Tighten the nut...
Page 14 - Attaching the M-48 to Any Part of a Mic Stand
Installation 14 By using the Roland APC-33 all-purpose clamp (sold separately) in conjunction with the included mounting bracket, you can freely attach the M-48 to any part of a mic stand. • APC-33 attachment screws x 4 (included) • Screws for fastening the M-48 x 2 (included) 1 Using the four inclu...
Page 15 - Attaching the REAC Connector Cover; Attaching the Ferrite Core
Installation 15 If you’re using a commercially available Cat5e Ethernet cable, attach the included REAC connector cover to the REAC port. The REAC connector cover must be attached in order to minimize electromagnetic noise. 1 Hook the included REAC connector cover over the tab of the REAC port. 2 Pr...
Page 16 - Connecting External Devices
16 Connecting External Devices * The M-400 must be running system software version 2.0 or later. * The M-48 can be set and managed from the M-400 only if the M-48 is connected to the M-400’s REAC B port via the S-4000D. * In order to maintain the transmission quality of the digital REAC signal, use ...
Page 17 - Connecting the M-48 to an Analog Mixer System
Connecting External Devices 17 * The S-1608 system must be running system software version 2.0 or later. If you’re using the S-4000 system, the S-4000 system must be running system software 2.1 or later. * In order to maintain the transmission quality of the digital REAC signal, use fully approved C...
Page 18 - Connecting Nine or More M-48 Units
Connecting External Devices 18 * Up to four S-4000D can be connected in series. Approximately 200 microseconds of transmission delay will occur for each unit. * Up to twenty-four M-48 units can be connected. For more advanced configurations, call your local Roland Systems Group representative. * The...
Page 19 - Connecting Input/Output Devices to the M-48
Connecting External Devices 19 * If headphones are connected to both the PHONES jack 1 and jack 2, make sure that the combined impedance of the headphones is not less than 16 ohms. * The LINE OUT L/R jacks are balanced TRS type jacks, and are wired as follows. Before you make connections, check the ...
Page 20 - Turning the Power On/Off; Turning the Power On
Connecting External Devices 20 The M-48 supports REAC EMBEDDED POWER. When the M-48 is connected to the S-4000D via a REAC cable, power will be supplied via the REAC cable. REAC EMBEDDED POWER is technology that uses a Cat5e cable to supply not only REAC audio signals but also power to a REAC device...
Page 21 - Making Settings for the M-48; 0-channel Mixer Settings and Operation
21 Making Settings for the M-48 In order to take full advantage of the M-48, you must correctly understand the M-48’s settings and operation as a 40-channel mixer, and make the appropriate settings. The sources 1–40 that are input via REAC are mixed by the M-48’s 40-channel mixer. Settings and opera...
Page 22 - Other settings; Default Values of the Settings
Making Settings for the M-48 22 In addition to setting the source level, pan, and source assign settings, the mixing engineer can also make the following settings. * For details on how to make these settings, refer to the owner’s manual of the M-400 (Ver. 2.0 or later) or the S-4000 RCS Ver. 2.0. In...
Page 23 - Example Setups; Example setup for the Drummer
Making Settings for the M-48 23 Example Setups Example setup for the Drummer Level Pan 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Source Groups for the drummer * Level/pan settings shown are ap...
Page 24 - Example setup for lead vocalist
Making Settings for the M-48 24 Example setup for lead vocalist 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 *1 The level should be turned down for unused sources. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Groups for the lead vocalist Ke...
Page 25 - Example setup for backing vocalists
Making Settings for the M-48 25 Example setup for backing vocalists 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Groups for backing vocalist 1 *1 *2 Drums Lead Vocal *1 *2 There is no need to use...
Page 26 - Adjusting the Mix; Adjusting the Volume of Each Group
26 Adjusting the Mix Adjust the volume of each group to obtain an appropriate monitoring balance. 1 Press the [1-8] or [9-16] button to select the layer of the groups that you want to control. The button of the displayed layer will light. 2 Press the [VOLUME] button. The [VOLUME] button will light; ...
Page 27 - Adjusting the Pan of Each Group; Adjusting the Input Level of AUX IN; Using the Built-in Ambient Mic
Adjusting the Mix 27 Here’s how to adjust the pan of each group. 1 Press the [1-8] or [9-16] button to select the layer that includes the group whose pan you want to adjust. The buttons for the displayed layer will light. 2 Press the [PAN] button. The [PAN] button will light; now you can use the [Co...
Page 28 - Using Effects; Applying Reverb to Each Group
28 Using Effects Here’s how to apply reverb to the sound of each group. 1 Press the [1-8] or [9-16] button to select the layer whose reverb you want to adjust. 2 Press the [REVERB] button. The [REVERB] button will light, and reverb will turn on. * Reverb will turn off if you press the [REVERB] butto...
Page 29 - Headphones Output and Line Out Adjustments; Adjusting the Headphones Output Level; Adjusting the Headphones Output Tone; Adjusting the Line Out Output Level
29 Headphones Output and Line Out Adjustments Here’s how to adjust the output level of the sound being monitored through headphones. 1 Turn the PHONES [VOLUME] knob to adjust the headphone output level. 2 Turn the rear panel [ATT] knob to obtain the most suitable output level. Adjust the output leve...
Page 30 - Using the Memory Functions; About Memory
30 Using the Memory Functions The current mixer settings are held in “current memory.” Current memory contains the following settings. • Source level/pan settings • Source assignment settings • Group mix (volume, pan, reverb send, EQ, and solo for each group) • Reverb on/off The M-48 provides 16 mem...
Page 32 - Main Specifications; Dimensions
32 Appendices Main Specifications * 0dBu: 0.775Vrms * In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice. * The M-48’s specifications were measured in connection with below mentioned devices. Input Unit: S-1608, Splitt...
Page 33 - Block Diagram
33 Block Diagram L/R LINE OUT 1 PHONES OUT 2 MAIN L MAIN R PHONES L PHONES R A UX L A UX R REC METER (C ontr ol fr om M-400 / PC) GAIN REDUCTION MONO MUTE LO W P ASS LINE OUT AMBIENT MIC A/D A/D A UX IN D/A D/A AMBIENT MIC MAX MIN A UX IN MAX MIN V O L UME MAX MIN V O L UME MAX MIN LIMITER MAX OFF T...
Page 34 - Troubleshooting
34 Troubleshooting Symptom Cause No sound. ● The M-48’s output has been muted by an operation from the M-400 or computer. To cancel the mute using the M-48, press any of the top panel buttons. ● The REAC connection has not been established (p. 20). Check whether there might be a problem with the REA...
Page 35 - NOTICE; FEDERAL COMMUNICATIONS COMMISSION; WARNING
This product complies with the requirements of EMC Directive 2004/108/EC. For EU Countries For Canada This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur...
Page 36 - Information
* 5 1 0 0 0 0 5 2 2 8 - 0 1 * Information When you need repair service, call your nearest Roland Service Center or authorized Roland distributor in your country as shown below. As of Jan. 1, 2009 (RSS) ASIA INDONESIA PT. Citra IntiRama JL. Cideng Timur No. 15J-15O Jakarta PusatINDONESIATEL: (021) 63...
