XMV Series Power Amplifiers

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.

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.

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

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.

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.

 What is the Distribution Mode on the YDIF?

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.

Usage example:

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

 What is the Cascade Mode on the YDIF?

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.

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.

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.

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.

Please refer to the YDIF and Dante compatibility chart.

 Which models support YDIF and Dante?

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.

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

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

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.


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.

[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.

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.

The following XMV parameters can be controlled using MTX-MRX Editor:

- Attenuator

- Mute

- Polarity

- Dimmer (LED brightness)

- Input source selection

- Power supply: On/Standby

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.

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

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.

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