The Nexo NXAMP is far more complex than a bundled power amplifier and loudspeaker controller. Significant DSP innovations allows multiple digital sense lines to protect at the same time the amplifier and the connected speakers.
The NXAMP 4X1 & 4X4 Powered TD controllers are based on an innovative design that will provide the full integration of speaker and amplifier control with output capacities that will allow end users a cost effective solution.
The innovative control structure implemented into the NXAMP is via the latest generation of NEXO’s TD controller into the amplifier. This full integration of control will provide a safety base and real-time performance that is a first of kind by having all the parameters being controlled by the DSP. This real-time control will offer the end users the ability to manage the voltage/current/temperature sense lines from the amplifiers output, protecting both the amplifier and its power supply in real time, while simultaneously offering all control parameters required for the speakers.
The NXAMP 4X1 & 4X4 Powered TD controllers, available in two 4-channel sizes produce an output capacity of 4x1300W under 2Ω for the 4×1 model and 4x4000W under 2Ω for the 4×4 model; establishing the 4×1 model as one of the most versatile amplifiers and the 4×4 model as one of the most powerful amplifiers to ever be produced. These models will permit the users to connect a large number of NEXO speaker systems while working on a platform that will maximize their performance.
With the optional incorporation of the new generation EtherSound 100 hardware, the NXAMPs will additionally provide an unprecedented capability of Digital Audio networking and Control.
- NXAMP 4×4 is among the industry’s most powerful amplifiers
- Cost effective integration of command, control, protection and amplification of all NEXO loudspeaker systems
- Lighter and requires less rack space than conventional amplifier processor systems
- Eliminates unnecessary A/D conversion
- Optional EtherSound Networking
Processing and Control
The new generation signal processor in the NXAMPs is identical on both models, and derived from the NX242 TD controller. The processing power has been increased on both CPU and DSP.
The NXAMPs utilise twin DSPs, with a total processing power that is 3.5 times the processing power of an NX242 fitted with an ES-4 NXtension board. Amplifier output is now sensed in both voltage and current and 24bit converters execute these measurements. The latest generation audio converters provide enhanced dynamic range with low latency (500us) analogue input to output, in “flat” mode.
Clean and Cool EEEngine
One of the primary objectives of Yamaha’s EEEngine technology is to deliver maximum efficiency in drive performance and power, while providing the audio quality of traditional class AB amplifiers that have an equivalent heat dissipation of class D amplifiers. The results have illustrated a 50% reduction in power consumption which provides outstanding sound quality.
Robust, Rugged Power Supplies
The power supplies of the NXAMPs are SMPS (Switch Mode Power Supply) full resonance types with half bridge converters. This exceptional design offers the advantages of being smaller in size, improved power efficiency, and decreased heat generation. The design additionally minimizes noise via its Zero Crossing Switch (ZCS) technology.
The NXAMP4x4 employs four times the structure of a monaural amplifier with four separate power supplies that present a high power capacity with a low load drive. In addition, on both models, two converters work synchronized in the opposite phase, thus cancelling noise. The benefits will include unrivalled sonic performance and low electromagnetic emissions.
Ferocious Final Stage (with Protection)
The output transistors in the final stage use thin chip technology with a small thermal resistance. Moreover, the model used here is a custom version with a maximum voltage now reaching 300 Volts. The final stage of the NXAMP 4×4 uses nine such transistors in parallel for a maximum of 135Amp output current capacity.