Nexo NXAMP 4x4 Powered TDcontroller, 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.

Through the combination of NEXO’s renowned expertise in producing top-of-the-line sound reinforcement products and Yamaha’s internationally acclaimed professional audio division, two years of collaborative research using the latest-generation development and research tools have yielded a major breakthrough in high-powered amplification for both fixed and mobile applications.

The NXAMP 4X1 and 4X4 Powered TDControllers 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 TDcontrollers. This full integration of control will provide a safety base and real-time performance that is the first of its kind, having all the parameters controlled by the DSP. This real-time control will offer end users the ability to manage the voltage/current/temperature sense lines from the amplifier's output, protecting both the amplifier and its power supply in real time, while simultaneously offering all control parameters required for the speakers.

NXAMP DSP Protection includes:

• Power-on protection (smooth start-up with in-rush limitation)
• Power-off protection (clean shut-down procedure)
• 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

Power Specification for NXAMP4x4

• Number of amplifiers channels 4x channels, 2 by 2 bridgeable
• Max. output voltage (no load) 4 x 200Volts
• Max. output power into 8 ohms 4 x 1900W
• Max. output power into 4 ohms 4 x 3300W
• Max. output power into 2 ohms 4 x 4000W
• Power consumption (Standby) 20W
• Power consumption (Idle) 150W
• Power consumption (1/8 Power) 3000W

Common NXAMP Specifications from Analogue in to Power Out

• Analog Inputs channels 4x channels, analogue inputs on XLR 3 with a second XLR 3 for linking
• Frequency response ±0.5dB from 10Hz to 20KHz
• Input Impedance 20KΩ
• Max Input Level +28dBu
• Dynamic Range All Channels = 105dB unweighted
• THD + Noise Typical 0.1% flat setup
• Latency time 500us on a flat setup
• Power Supply 220 ~ 240Volts

Common NXAMP Features

• Audio Inputs
  • 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.
• Power Outputs 4x Speakon outputs using internal power relay for automatic output assignment regarding setup.
• RS232 port Allow firmware upgrade for software improvement and new cabinet setups.
• GPIO port 5x Global Purpose Inputs and 8x Global Purpose Outputs for simple remote control and monitoring.
• Processing Two DSPs, 24bit data with 48bit accumulator. 700MIPS.
• Front Panel
  • 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.
• Rear Panel 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.
• Dimensions & Weight NXAMP4x4: 4U 19” Rack - 457 mm (18”) Depth - 24.5kg (49lbs) net

NXAMP User Controls

• System Selection Allows control across all NEXO ranges.
• System Set-up 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.
• Protection Multiple Peak Limiters fitted for both selected cabinet and amplifier. Multiple Acceleration, Displacement and Temperature protections on every channel. Inter-channel regulation.
• Delay Up to 150m (330 ft.) of delay in 10cm (.4in ) steps
• Input Patching Allows any of the 4x analogue (or digital) inputs combination to be routed on each output.
• Output Gain Global and inter-channel gain ±6dB in 0.5dB steps.
• Volume control Each channel with 16x steps from – inf dB to 0dB.
• Save/Recall Set-up Stores up to 40x user set-ups; On- the-fly recall, without mute or glitches for instant comparison.
• Array EQ LF or HF shelving filters to compensate ground or stacking effects, ±6dB, frequency factory tuned.
• Security Mode Password protected for Read-Only or Remote-Only Mode.
• Remote control Full remote control via the Ethersound protocol and ESmonitor software.
• Certification UL, SEMKO (CE), CCC, KOREA, TSS, PSE
• Green status Compliant with ROHS and WEEE directive

Nexo PS8 Loudspeaker, The PS8 features advanced NEXO designed low magnetic emission Neodymium drivers, making the PS8 extremely light and compact while usable next to magnetically-sensitive professional video or computer equipment. The dispersion, architecture and weight balance are designed to provide uncompromised PA and stage monitor performance from a single speaker, and background and foreground music playback applications are equally well-served.

Like the new PS10-R2 and PS15-R2, this flexibility is realized by a proprietary constant directivity asymmetrical dispersion horn, easily configurable (by users) in four positions by 90° rotations.

Coupled with the horn’s unique progressive horizontal (50° to 100°) and vertical (55°) dispersion, the most suitable pattern can be selected for vertical or horizontal PA usage or wedge monitoring. The PS8’s 2-way passive 8Ω design employs a single amplifier channel to deliver bi-amped performance, reducing system cost, size and complexity, and a new grille design increases durability while fully accommodating use as a wedge.

Features

• High-power system (125dB Peak SPL @ 1m) with new 8in LF and 1in HF low magnetic emission Neodymium drivers for light weight (7.5kg, 16.5lbs) and negligible magnetic leakage.
• Rotatable, asymmetrical horn and unique cabinet architecture ensure versatility; user adaptable for both PA and stage monitoring applications.
• Two-way passive 8Ω design uses a single amplifier channel for simpler installation and lower cost.
• Sophisticated control electronics ensure reliable, linear operation. Supported with a full range of mounting and flying accessories.

System Applications

• Installed PA for clubs, A/V, theatre, broadcast, Houses of Worship, theme parks, etc.
• High-quality, low-profile stage monitoring for clubs, A/V, theatre, broadcast, etc.
• Near-field, down-fill and under-balcony systems in support of larger systems.
• Foreground and background music source for retail establishments seeking audio with impact.
• Anywhere powerful, high-quality performance is required near to magnetically-sensitive

Specification

• Components
  • LF 1 x 8" (20 cm) Shielded Neodymium 8Ω driver.
  • HF 1 x 1" Shielded Neodymium throat driver + Low Distortion, Constant Directivity Asymmetrical Dispersion Horn.
• Height x Width x Depth 406mm x 250mm x 219 mm (16" x 9 7/8" x 5 5/8").
• Weight 7.5 kg (16.5 lbs).
• Connectors 2 x NL4MP SPEAKON 4 pole.
• Construction Baltic Birch Ply finished with structured black coating.
• Fittings
  • Handles - Front finish: Moulded Dark Grey Metal Grill
  • Flying Points & Fixed Installation Threaded inserts are fitted as standard to all cabinet surfaces for connection of mounting accessories.
• Stand fittings Built-in Stand Fitting, (35mm / 1 3/8").

System Specifications PS8 with PS8 TDcontroller

• Frequency Response [a] 69 Hz - 19 kHz ±3dB.
• Usable Range @-6dB [a] 62 Hz – 20 kHz.
• Sensitivity 1W @ 1m [b] 96 dB SPL Nominal - 94 dB SPL Wideband.
• Nominal Peak SPL@1m [b] 122 to 125dB Peak.
• HF Dispersion [c] 50° to 100° Hor. x 55° Vertical. Rotatable Horn, 4 positions.
• Directivity
  • Q : 10 Nominal. DI : 10 dB Nominal.
  • ( f > 1.8 kHz ) Crossover Frequencies 2.5 kHz Passive.
• Nominal Impedance 8Ω Recommended Amplifiers 200 to 500 W / 8Ω.

System Operations

• Electronic Controller The PS8 TDcontroller is precisely matched to the PS8 & LS400 cabinets and includes sophisticated protection systems. Using PS8 & LS400 without a properly connected PS8TD will result in poor sound quality and can damage the components. PS8 & LS400 can also be used with NXAMP4x1 and NXAMP4x4 Powered TDControllers.
• Dispersion configuration After dismounting the front grille from its fixings, the HF Horn can be rotated in 4 positions for dispersion configuration.
• Sub-bass The PS8 can be used without optional LS400 Sub-bass. Active two-way operation with the LS400 is included in the PS8TD. One LS400 matches 2 x PS8, additional LS400 may be used for enhanced LF capability.
• Speaker Cables PS8 are wired 2- & 2+ on Speakon connectors, LS400 on 1- & 1+. Loop through Speakons are present on both. Single identical cables can thus be used to loop through combinations of up to 2 x PS8 & 1 x LS400 in no particular order.