Yamaha | Nexo NXAMP4X4 | 4x1 & 4x4 Powered TDcontrollers

4x1 & 4x4 Powered TDcontrollers
NX AMP Advantages
• NXAMP 4x4 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
NX AMP Advantages
• Power-on protection
(smooth start-up with in-rush limitation)
• Power-off protection (clean shut-down
• Peak Voltage limiter (clip limiting)
• Peak Current limiter
• VHF protection
• Integrate current limiter
• DC offset protection
• Short circuit protection
• Fan speed control
• Power Amp overheat protection
• SMPS overheat protection
• SMPS fault protection
• Power cable monitoring
NXAMP technology is far more complex than a bundled
power amplifier and loudspeaker controller. More than
two years of research yielded significant DSP innovations
which allow multiple voltage/current/temperature sense
lines, from the amplifier’s output, to protect both the
amplifier and power supply.
Robust, Rugged Power Supplies
NXAMP power supplies are full resonance types with half
bridge converters. This exceptional design minimizes noise
is via (Zero Current Switch (ZCS) technology. NXAMP4x4
employs four times the structure of a monaural amplifier
to present very high power with low load drive.
This requires four converters, four transformers and of
course four power supplies. In addition, on both NXAMP
models, two converters work synchronize the opposite
phase, thus cancelling noise. The benefits include
unrivalled sonic performance and low EMC.
Clean and Cool EEEngine
Both NXAMP amplifiers employ YAMAHA’s EEEngine
technology. This technology offers the sonic purity of
conventional class AB, but with a heat dissipation equaling
class D technology. In fact, NXAMP rails constantly follow
the output signal needs, minimizing the required
headroom (and wasted energy).
Ferocious Final Stage (with Protection)
NXAMP’s final stage output transistor is customized for
these devices via thin chip technology, with minimized
thermal resistance, to reach 300 Volts. NXAMP4x4’s final
stage uses nine such transistors in parallel, to supply
135Amp output current capacity.
Even though DSP protection is already used on both
NXAMP models, an Area of Safety Operation (ASO) limiter
circuit is also included. ASO limiting is done in analog, as
the limiter attack required is too fast for digital protection
and converter latency.
4x1 & 4x4 Powered TDcontrollers
Number of amplifiers channels
Max. output voltage (no load)
Max. output power (8Ω)
Max. output power (4Ω)
Max. output power (2Ω)
Power consumption (Standby)
Power consumption (Idle)
Power consumption (1/8 Power)
4x channels, 2 by 2 bridgeable
4 x 200Volts
4 x 1900W
4 x 3300W
4 x 4000W
4x channels, 2 by 2 bridgeable
4 x 105Volts
4 x 600W
4 x 900W
4 x 1300W
Analog Inputs channels
Frequency response
Input Impedance
Max Input Level
Dynamic Range
THD + Noise
Latency time
Power Supply
4x channels, analogue inputs on XLR 3 with a second XLR 3 for linking
±0.5dB from 10Hz to 20KHz
All Channels = 105dB unweighted
Typical 0.1% flat setup
500us on a flat setup
Dedicated version for 100 ~ 120Volts or 220 ~ 240Volts
Audio Inputs
Power Outputs
RS232 port
GPIO port
Front Panel
NEXO is one of the world’s leading sound
reinforcement loudspeaker manufacturers.
Founded in 1979, the company is dedicated to
crafting practical solutions with solid engineering.
Each new design begins with a proprietary
sophisticated computer simulation process that
allows every parameter to be extensively modeled
and simulated, leading to breakthrough cost and
performance gains. NEXO’s comprehensive
product line includes loudspeakers, analogue and
digital control electronics and amplification; all
designed to deliver consistent sound quality and
long term reliability for a broad range of
Parc d’Activité
du Pré de la Dame Jeanne
B.P. 5
Tel: +33 (0) 3 44 99 00 70
Fax: +33 (0) 3 44 99 00 30
e-mail: info@nexo.fr
Tel: +1 305 677 9322
Fax: +1 360 234 7870
e-mail: info@nexo.fr
Rear Panel
Dimensions & Weight
• 4x balanced analogue inputs on XLR3 with a second XLR3 for linking, using 24bit converters.
• 4x digital inputs via the optional network card slot at the back.
4x Speakon outputs using internal power relay for automatic output assignment regarding setup.
Allow firmware upgrade for software improvement and new cabinet setups.
5x Global Purpose Inputs and 8x Global Purpose Outputs for simple remote control and monitoring.
Two DSPs, 24bit data with 48bit accumulator. 700MIPS.
On/Off Mains switch, Select Wheel, Menu A and Menu B buttons, 40 characters by 2 lines
display. Amp protect, Stand-by and power LED’s. Then for each channel: volume indicator (15x
LEDs), Individual Mute buttons and red LED, output current signal green led, Speaker Protection
yellow LED, Amp. Peak red LED.
1 (NXAMP4x1) or 2 (NXAMP4x4) mains socket; RS232 serial communications connector;
GPIO port, Expansion slot for networking audio extension card, 4 XLR inputs with link and 4
Speakon 4 outputs.
NXAMP4x1: 3U 19” Rack - 457 mm (18”) Depth - 16.5kg (33lbs) net
NXAMP4x4: 4U 19” Rack - 457 mm (18”) Depth - 24.5kg (49lbs) net
System Selection
System Set-up
Input Patching
Output Gain
Volume control
Array EQ
Security Mode
Remote control
Green status
Allows control across all NEXO ranges.
Within the selected range, if possible, allows cabinets to be set for passive or active mode, wideband
or crossover mode, choose among available crossover point, cardioid or supercardioid mode.
Multiple Peak Limiters fitted for both selected cabinet and amplifier. Multiple Acceleration,
Displacement and Temperature protections on every channel. Inter-channel regulation.
Up to 150m (330 ft.) of delay in 10cm (.4in ) steps
Allows any of the 4x analogue (or digital) inputs combination to be routed on each output.
Global and inter-channel gain ±6dB in 0.5dB steps.
Each channel with 16x steps from – inf dB to 0dB.
Set-up Stores up to 40x user set-ups; On- the-fly recall, without mute or glitches for instant
LF or HF shelving filters to compensate ground or stacking effects, ±6dB, frequency factory tuned.
Password protected for Read-Only or Remote-Only Mode.
Full remote control via the Ethersound protocol and ESmonitor software.
Compliant with ROHS and WEEE directive
As part of a policy of continual improvement, NEXO reserves the right to change specifications without notice.
GPO Box 806
Hong Kong
SAR China
Tel: +852 9096 3472
Fax: +852 2104 3214
e-mail: info@nexo.fr
NEXO loudspeakers and electronics are covered against defects in workmanship or materials for a period of two (2) years from the original date of
purchase. At the option of NEXO the defective item will be repaired/replaced with no charge for materials/labour. The item is to be adequately
packaged and dispatched, pre-paid, to a NEXO authorised distributor/service centre. Unauthorised repair shall void the warranty. The NEXO
warranty does not cover cosmetics or finish and does not apply to any items which in NEXO’s opinion have failed due to used abuse, accidents,
modifications or any type of misuse. All images and text herein are the property of NEXO SA, and deemed accurate, although specifications are
subject to change without notice.
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