The superior quality and reliability of the S-4000 digital snake is made possible using Roland's REAC digital transmission technology. It is REAC that allows for such a low latency and high quality digital snake, providing all of the advantages of low cost, easy installation, and pristine audio with zipperless remote control of all preamp settings.

Roland's original newly invented Ethernet technology
REAC (Roland Ethernet Audio Communication) is newly designed technology for digital audio transfer by Roland. The REAC spec provides a high quality and safe, redundant digital audio transfer system that can be easily installed or integrated for any audio snake application. REAC is a "plug and play"system that is easy to configure and requires no complex setup or computer operation. Plug in your mics, plug in the Ethernet cable and you're ready to go!

*REAC, based on the Ethernet 100BASE-TX protocol, transfers signals using Cat5e cable.
*Durable and reliable connector made by Neutrik
*Up to 40 channels of 24bit/96kHz audio plus MIDI and remote control data can be transferred in one cable.

 

High quality and low noise digital transfer
In the analog domain, it is impossible to avoid signal degradation during long distance audio transfer at concerts or events in large halls or arenas. Digital transfer of REAC provides extremely flat and pure audio transfer for the whole frequency bandwidth. Furthermore, additional audio benefits occur because the source signal is transferred after boosting the gain using the high quality and remote controllable XR-1 mic pre-amp designed for the S-4000S-3208.

 

Minimize a signal's damage due to "noise pollution"
Hums and buzzes from external noise sources can often be a problem for analog snake installation. It can be difficult to know where potential noise sources might be before installing a snake. And solving subsequent noise problems requires lots of experience and time. REAC provides an effective solution to these installation problems. Technically, the risk of noise pollution such as the induction of hums and buzzes into a digital snake is much lower than in an analog snake, and cross talk is minimal or non existent. This provides almost complete routing freedom for your cable installations.

Super Low latency digital transmission
Degradation of the audio signal is minimal in any digital transfer system. However, musicians, performers or even audiences may suffer from the excessive latency of other digital transfer systems. REAC eliminates these digital audio transmission problems with its super low latency. Even when transmitting 40 channels at 24bit/96kHz/Linear, REAC's latency is only 0.375ms*. This very low latency makes the S-4000 system perfect for all audio installations, especially in-ear monitoring systems.

 

High Quality Pre-amps on each input channel
In an analog system, low-level microphone signals are boosted using a mic preamp only after the long, arduous journey down the analog snake. For this reason it's difficult to avoid degradation and cross talk. The S-4000S-3208 is equipped with high quality and remote controllable XR-1 pre-amps that boost the input gain right at the microphone, where the highest quality signal is found. This ensures that your audio will sound its best. And of course once the signal is in digital form, it is immune to analog cabling losses. The XR-1 pre-amp has been specially designed for live audio applications and is made of high quality components carefully selected by Roland's engineers.

Simple and low cost installation with Cat5e cabling
REAC brings another revolution to audio installations by eliminating the need to use thick, heavy and hard to handle analog multi-pair cables by transmitting audio using light, slim and easy to handle Cat5e cable. On one very thin Ethernet cable, REAC can transfer 40 channels of high quality 24bit/96kHz audio signal plus MIDI and remote control signals. Since the cable used for REAC transfer is ordinary Ethernet cable, the low cost and easy availability of the cable is a big advantage compared with using analog cable. From temporary installations in outdoor concerts to permanent installations in arenas or halls, REAC provides the benefit of light weight, inexpensive and easy to install cable.　

 

 

 

Free split and Extension with Switching Hubs

The 100 meter length of an S-4000 digital snake can be easily extended using Switching Hubs. Splitting your source audio to multiple recording or mixing devices is also very easy and cost effective.

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　Remote Controller　S-4000R

The S-4000R can be connected to either the S-4000S-3208 or the S-4000H . It provides easy remote control of all input gain adjustments, phantom power and PAD settings. Since the remote can save up to 10 setups to internal memory, you can instantly recall the right settings for performance and stage configurations and room defaults instantly.

・Level meter displays the input levels of 40 channels

・Instant recall of appropriate setup from internal memory

・Gain adjustment for each input channel and phantom power settings

 

　 40CH I/O MODULAR RACK

This unit has 32 inputs + 8 outputs and is typically installed at stage side. The AD/DA conversion is 24bit/96kHz. High quality XR-1 pre-amps are provided for each input channel, which can accept both mic and line level inputs, eliminating the need for direct boxes. Phantom power and an input PAD is available for each channel.

・Input Channel Indicator
This indicates Signal, Clip and On/Off status of the phantom power for each input channel. The status of the input channels can be checked even from the stage.

・Analog Input Modules
On board 24bit/96kHz AD converters and high quality mic pre-amps with phantom power supply.

・Analog Output Modules
On board 24bit/96kHz DA converters.

・REAC Module
Redundant REAC transfer provides continuation of audio transmission even in case of accidental damage of one cable.

・MIDI terminals
MIDI is transferred down the snake from both the In and Out MIDI connectors. These enable the remote control of mixers or musical instruments from external MIDI devices at the stage or FOH positions.

・REMOTE terminal (RS-232C)
Connection for either the dedicated remote controller (S-4000R) or a computer installed with the remote control software (S-4000RCS*).* S-4000RCS software is free and can be downloaded from www.roland.com.

・Mute All Outputs button
When this button is pressed and held, all Outputs in the S-4000 system will be muted. This is convenient for changing cable connections.

・Cooling fans x 3
Internal heat is exhausted using 3 fans on the rear panel reducing the operational noise of the fans.

・Power Inlets
The Locking Arm is equipped to prevent accidental unplugging of the power cord. The DC power supply connection is provided for use with an optional redundant power supply in case of power supply failure.

　32x8 FOH UNIT　S-4000H

The S-4000H receives signals from the stage and is typically placed next to the FOH mixing console. Its 32 analog outputs are used to send signals from the stage to the mixing console and its 8 inputs for returning signal such as Main audio or monitor mixes to the stage. AD and DA conversions are 24bit/96kHz.

・REAC terminals

・Input terminal
8 channels of analog input with D-Sub connection.

・MIDI terminals (In/Out)

・Output terminals
32 channels of analog output with D-Sub connection. 8 channels per one D-sub.

・REMOTE terminal (RS-232C)

・Cable strain relief rail
Protective rail used to relieve cable strain and to prevent accidental unplugging of the D-sub cables.

・Power switch protection
Cover to prevent accidental turning off of the power switch.

 

 

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Digital Snake system provides easy and fast system setup.
You will have the freedom to easily expand your system.
High quality and secure digital audio transmission system that can be integrated at a very affordable price.

Remote Control by computers
A computer can be connected to the REMOTE terminals (RS-232C) of an S-4000S-3208 or an
S-4000H. Once the S-4000RCS software* is installed, up to 160 channels of an S-4000 snake system can be remote controlled from your computer using up to 4 RS-232c ports.

* S-4000RCS software is free and downloadable from www.roland.com.

Very long distance snake systems can be designed using an optical converter
If the REAC Ethernet transmission is converted to an optical signal using a approved converter compatible with 100BASE-TX, the system's digital audio can be transferred for several kilometers.

* Transfer distance differs depending on the converters and cables.　

The Modularity and flexibility of the S-4000 system can be used to create very complex audio transmission systems
・System design can be very flexible using an S-4000 Digital Snake system made of many units.

・Using multiple S-4000S-3208 and S-4000H modules, large systems can be designed from 32 inputs and 8 outputs to 64x16, 96x24 and up to 160 total channels or more.

The S-4000 system is designed to provide splits of its source audio using standard Ethernet hardware. Using switching hubs, you can send source audio to multiple recording consoles, a monitor position, broadcast location and more. No signal degradation will occur from the source's master output to the recording or any other split output.

SC-A41 D-Sub 25 pins XLR female (x8) cable x1 Length : 4.5 meters D-Sub 25 pins XLR male (x8) cable x4 Length : 4.5 meters	SC-W100S 100 meter Cat5e cable Crossover cable with Ethercon connector of Neutrick (R)	S-240P External Power Supply Unit Supplies redundant DC power to S-4000S-3208 or S-4000H. Outputs DC24V 6A power.