Computing Resources; Four Separate Inputs; Power Supply; Ethersound™ Optional Board - Yamaha Nexo NXAMP4X4 User Manual

Computing resources

The DSP resources have been multiply by 3.5 between the NX242ES4 and the NXAMP (so
it means by 7 between the NX242 and the NXAMP). This will ensure that the NXAMP will
have enough DSP resources to deal with many years of algorithm improvements. Other
key components like CPU speed, memory quantities and so on have been also upgraded.

Four separate inputs

The analog input stage now offers 4 separate symmetrical inputs, each on XLR with link
(due to the 3U , on NXAMP4X1, or 4U , on NXAMP4X4 height of the unit, there is plenty of
space for connectors at the back). All the inputs offer considerable 28 dBu headroom
(same than on the NX242). These analog inputs leads to last generation 24 bits converters
running at 48 KHz (like on the NX242-ES4).

Power supply

The NXAMP4X1 Powered TDcontroller uses three separate switch mode power supplies
(SMPS) whereas the NXAMP4X4 uses 5. A first small power supply is used for powering the
TDcontroller digital board, and to initiate the power amp. The other big power supplies are
used for power amplifiers:
• On NXAMP4X1, channels 1 & 2 (on one power supply) and for channel 3 and 4 (on
the other one).
• On NXAMP4X4, each channel has its own large power supply.
These large power supplies are precisely tailored to work around a precise Mains voltage,
so separate model of NXAMP exists for 100 ~ 120 Volts on one side (these are models
NXAMP4X1U and NXAMP4X4U), and for 220 ~ 240 Volts on the other side (these are
models NXAMP4X1C and NXAMP4X4C).
Ethersound™ optional board
The NXAMP is designed to accept the optional NXES104 board witch offers four digital
inputs among a bidirectional 2x 64 channels Ethersound™ ES100 network. This optional
board uses the new NEXO slot which prevents the necessity to open the top panel of the
amplifier for installing the board. NXAMP firmware upgrade can also be performed through
this Ethersound™ port.

User interface

The front panel LCD display is now a comfortable 2 x 40 characters display, for easy access
to the parameters for each channel.
NXAMP VERSUS NX242: WHAT'S NEW?
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