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FAQ

Network Audio

What does YDIF mean?

YDIF is an abbreviation for Yamaha Digital InterFace. It is a proprietary sound transmission format for sending and receiving audio streams (total 16-channels) and wordclock via an Ethernet cable. The physical connections use a ring topography. YDIF can be used to connect rack mounted devices simply and easily. Control signals are not sent using YDIF but via a separate network port.

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What is the maximum cable length that can be used with YDIF?

The maximum length of cable that can be used to connect devices using YDIF is 30m. Since up to 8 devices can be connected using YDIF, the total length of cable used can be up to 240 m (30 m x 8). However, this does not mean that two connected devices can be spaced 240 m apart, since devices are connected in a ring configuration.
Note:
Since YDIF is a proprietary Yamaha standard, it is not possible to increase this distance using a network switch.

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What cable should I use to connect up YDIF?

Please use an 8-pin straight STP (shielded twisted-pair) Ethernet cable of Cat-5e or above.

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What is the difference between Distribution Mode and Cascade Mode on the YDIF?

Distribution Mode
In Distribution Mode, the default, up to 16 channels of audio signals are transferred in one direction — between multiple devices equipped with YDIF (MTX, MRX, EXi8, EXo8, and XMV), which are connected in ring connection. A single audio signal can be distributed to multiple devices.
Sample signal-flow diagram in Distribution Mode

Usage example:
The benefits of YDIF compared with analogue transmission is that audio signals are sent to XMV Series power amplifiers without any deterioration in sound quality, and cabling costs and labour costs are reduced.

Cascade Mode
Cascade Mode allows up to eight matrix bus channels of multiple MTX processors to be shared. By ring connecting up to four MTX processors, up to 32 channels of microphones can be connected and 8 shared mixes created. The 8 mixes can be used on all MTX processors, allowing up to 32 output channels. Only MTX processors can be connected in Cascade Mode with YDIF. Note that selection of distribution or cascade mode is made per device. Transmission to XMV amplifiers is always made in distribution mode.

Sample signal-flow diagram in Cascade Mode

Usage Example:
Multiple MTX3 are connected in cascade mode to increase input channels.

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How many devices (e.g. MTX3, MTX5-D, MRX7-D, EXi8, EXo8, and XMV amplifiers) with YDIF connectivity can be connected together?

Up to eight devices equipped with YDIF can be connected in Distribution Mode. However, at least one MTX/MRX processor must be included. Up to four MTX processors can be connected in Cascade Mode. However, only MTX processors can be connected in this mode.

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Can a Dante-compatible device, such as an MTX5-D, MRX7-D, XMV4140-D, or XMV4280-D, exchange audio signals with another Dante-compatible device?

It is possible to transmit audio signals between a Dante-compatible device and other Dante devices, such as a CL Series digital mixing console or a Dante MY16-AUD card, via a Dante network by setting up routing using Dante controller.

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Do Dante enabled devices such as MTX5-D, MRX7-D and XMV-D require separate Ethernet cables to exchange control signals and audio signals?

Since the control signal and the audio signal are transferred using a single Ethernet cable in Dante, it is not necessary to have separate Ethernet cables for the control signal and the audio signal.

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Is it possible to control the head amp of an external device (such as an EXi8 or a Rio3224-D) using MTX-MRX Editor?

If you use an EXi8 in conjunction with a MTX/MRX processor, you can control the EXi8's head amp using MTX-MRX Editor. However, the head amp of an I/O device such as a Rio Series device cannot be controlled using MTX-MRX Editor. In that case, R Remote software would be necessary.

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Is it possible for other Yamaha devices (aside from MTX3, MTX5-D and MRX7-D) to control the head amp of MTX/MRX series devices (EXi8, MTX3, MTX5-D, MRX7-D)?

No, other Yamaha devices aside from MTX3, MTX5-D and MRX7-D do not have this ability.

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Which models support YDIF and Dante?

Please refer to the YDIF and Dante compatibility chart below.

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General Specification

What is Double Power Mode?

Double Power Mode is a mode which doubles the output power of an amplifier whose channels are connected at low impedance.
* This halves the number of channels that can be used.
When Double Power Mode is used, there is no need to use any special type of connection such as Bridge Mode.

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What operations can I perform using the front panel on an XMV amplifier?

You can set the following parameter settings:

Mute: On/Off
Attenuator:-99dB - 0dB
Input polarity: Normal/Invert
HPF: Off, 40 Hz, 80 Hz
Input source selection: Analog, Digital
Signal meter point selection: In, Out
Panel lock: temporary release of panel lock when panel lock is on

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Is it possible to separately set each channel on an XMV amplifier to high-impedance or low-impedance?

Not individual channels, but each pair of channels can be set to high-impedance or low-impedance.

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Is it possible to set the power to On, Standby, or Mute by remote control?

Yes. If a single XMV amplifier is being used, it can be controlled via a remote (3-pin Euroblock) connector. Also, if an XMV amplifier is included in an MTX/MRX system, performing a Preset Recall on the MTX/MRX processor from a DCP controller enables you to control these parameters remotely from the DCP controller.

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Is it possible to detect when an XMV amplifier is in an abnormal state without using a PC?

Yes.
An alert number will be displayed on the front panel of the XMV amplifier. In addition, the XMV amplifier will issue external notification of an abnormal state as an output on its (3-pin Euroblock) Fault Out port.
For example, an XMV amplifier can signal its state by turning an LED lamp connected to its Fault Out port on or off.
The XMV issues notification of the following abnormal states:
• The amplifier has overheated and the output limiter has been operated.
• The power supply has overheated and been shut down.
• Excess current has been detected.
• DC output has been detected.
• Excessive cumulative current or the maximum current has been detected.

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What are the available settings for the HPF (high-pass filter)?

In Low-Impedance Mode:
HPF can be set to "Off," "40 Hz," or "80 Hz."
When the amplifier is switched to Low-Impedance Mode, the HPF setting is automatically set to "off."

In High-Impedance Mode:
When the amplifier is switched to High-Impedance Mode, the HPF setting is automatically set to "80 Hz" to protect the device from damage due to magnetic saturation of the speaker's transformer. The HPF can be set to "40 Hz" when a lower-frequency range is required, such as when a sub-woofer is used.

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Is it possible to use a DCP controller, a GPI controller, or the Wireless DCP iPhone application to directly change the parameter settings for an XMV amplifier via an MTX/MRX processor?

No—however, since the XMV amplifier parameters can be saved as MTX/MRX processor preset data, you can change these parameter settings by performing a Preset Recall from any type of controller (DCP controller, GPI controller, or Wireless DCP) via an MTX/MRX processor.

To directly change the parameter setting for an XMV amplifier without using an MTX/MRX processor, please use "MTX3, MTX5-D, MRX7-D, XMV Series, EXi8, EXo8 remote control protocol specifications" to carry out remote operations with an external controller such as AMX, Creston via a network (TCP/IP) port.

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Which parameter settings on an XMV Series amplifier can be controlled using MTX-MRX Editor?

The following XMV parameters can be controlled using MTX-MRX Editor:
• Attenuator
• Mute
• Polarity
• Dimmer (LED brightness)
• Input source selection
• Power supply: On/Standby

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Is it possible to control an XMV amplifier using a third-party remote control system such as AMX or Crestron ?

Yes. It is possible to control an XMV amplifier remotely using external controllers such as AMX or Crestron controllers via a network (TCP/IP) port. For details, please refer to "MTX3, MTX5-D,MRX7-D, XMV Series, EXi8, EXo8 remote control protocol specifications".

*If you control multiple XMV amplifiers, you need to open the same number of ports as the number of XMV amplifiers that you control.

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How many VXS/VXC speakers can I use on an XMV amplifier channel?

VXS/VXC speakers and XMV amplifier matching (100V/70V line)

Speaker
Model
Mode Tapping Max No. of loudspeakers per amp channel
XMV4140(-D)
XMV8140(-D)
XMV4280(-D)
XMV8280(-D)
VXC4 100V 30W 3 6
15.0W 6 13
7.5W 13 26
70V 30W 3 6
15.0W 6 13
7.5W 13 26
3.8W 26 53
VXC6 100V 60W 1 3
30.0W 3 6
15.0W 6 13
70V 60W 1 3
30.0W 3 6
15.0W 6 13
7.5W 13 26
VXC8 100V 60W 1 3
30.0W 3 6
15.0W 6 13
70V 60W 1 3
30.0W 3 6
15.0W 6 13
7.5W 13 26
VXS5 100V 30W 3 6
15.0W 6 13
7.5W 13 26
70V 30W 3 6
15.0W 6 13
7.5W 13 26
3.8W 26 53
VXS8 100V 60W 1 3
30.0W 3 6
15.0W 6 13
70V 60W 1 3
30.0W 3 6
15.0W 6 13
7.5W 13 26
VXS10ST 100V 200W N/A 1
100.0W 1 2
50.0W 2 4
70V 200W N/A 1
100.0W 1 2
50.0W 2 4
25.0W 4 8

The above listing shows the maximum number of loudspeakers which may be used per amplifier channel. It is based on the amplifier's rated power, de-rated by 20% to allow headroom, and the impedance is checked to ensure it is above the amplifier's minimum impedance.
This list is provided in good faith. No responsibility is accepted for errors or specification changes. Please consult the website or the latest published user manuals for detailed specifications.

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Installation Case

Intec Systems recently completed major upgrades to the audio systems of two of New Zealand’s largest churches. Both installations were required to be easily re-configured depending on the requirements of each service with Dante providing the ideal connectivity solution.

Installation Case

As one of the UK’s major trade distributors of professional audio, lighting, video and special effects, Leighton Buzzard-based Leisuretec invests considerable time in training, seminars, product demonstrations and meetings with both clients and suppliers. The company has recently opened the TecZone, a new in-house space to facilitate all these and more, with Yamaha’s CIS series chosen for its 7.1 surround system.