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The lightweight nXp400 4-Channel Multi-Mode Network Power Amplifier from Ashly features programmable output on each channel selectable via rear panel DIP switches with swept load impedance monitoring. Audio is processed via the 32-bit SHARC DSP at 48 or 96 kHz sample rates and a built-in signal generator is provided for test tone and noise-masking.
The nXp400 amplifier comes pre-installed with Dante network audio module and features aux preamp outputs. Ethernet control is supported via the free Protea NE software (downloadable from Ashly's website) and serial data control is possible via Ashly programmable remotes or third party controllers (available separately). The Protea DSP (Digital Signal Processing) software is included for dynamics, gain, equalization, matrix mixer, crossover, delay, and metering.
The amplifier is suitable for live sound and fixed installation sound systems at performance venues, stadiums, arenas, convention centers as well as schools, store fronts, and places of worship.
32-bit SHARC DSP processing at 48 or 96 kHz sample rates
Class-D switching amplifier technology
Selectable 80 Hz Hi-pass filter, limiter, and input gain per channel, via rear panel
Comprehensive software controlled Protea DSP including dynamics, gain, equalization, matrix mixer, crossover, delay, and metering
Precision swept load impedance monitoring of individual amplifier channels for remote diagnosis of speaker problems
Remote iPad control app (available for free) for selecting DSP functions including gain, mute, matrix, A/B source select, PEQ filter level, and meters
Ethernet port for software control and monitoring of amplifier functions, with front panel COM activity LED
Serial data port available for Ashly WR-5 and RD-8C programmable remote control (optional RS-232 converter INA-1 available for third party controllers)
Real-time clock with event scheduler
Assign automatic execution of selected functions and tasks
Event scheduler is programmed using the free Protea NE software and stored in the amplifier
Protea NE software will load a speaker manufacturer's .fir or .csv file for precision tuning
Multi-mode operation-selectable outputs on each channel allow you to choose the desired output mode
Preset recall via contact closure, software control, remote control, or event scheduler
Programmable power-on delay
Remote gain and zone control with neWR-5 and FR-8/FR-16 programmable networked remotes
Aux preamp line outputs for driving other amplifiers
Fault condition logic outputs, assignable
Signal generator function for test and noise masking
Neutrik Combo XLR - 1/4" TRS jack plus Euroblock input connectors
Neutrik speakON twist locking loudspeaker connectors
Neutrik powerCON detachable AC mains connector
Set the DIP-switch configuration for low impedance (2, 4, and 8 Ohms), or constant voltage (70V or 100V)
Remote DC level control per channel
Extensive protection circuitry, continuously variable cooling fans
Power-saving Ashly EMS (Energy Management System) which provides an automatic sleep-mode drawing less than 1W
Multiple internal power supplies-provides increased channel separation and reliability
Instant standby mode, 30% reduction in idle power consumption, triggered by contact closure, software control, or event scheduler
Auto-switching 120 / 240 VAC power supply
cTUVus, CE, FCC, RoHS compliant
Ashly NXP4004 Specs
Amplifier
| Number of Channels | 4 |
| Voltage Gain | Selectable at 26, 32, or 38 dB, or 1.4 V |
| Damping Factor | >250 (8 Ohms load <1 kHz) |
| Filter | Input High Pass Filter: 80 Hz 2nd order |
| Distortion | SMPTE (Typical): <0.5% THD-N (Typical): <0.5% (8 Ohms, 10 dB below rated power, 20 Hz to 20 kHz) |
| Channel Separation | -75 dB (dB from full output, 1 kHz) |
| Signal-to-noise | >105 dB (20 Hz to 20 kHz, un-weighted) |
| Frequency Response | 20 Hz to 20 kHz, ±0.05 dB |
| Input Impedance | 10 kOhms |
| Balanced Input | Euroblock 3.5 mm, 1/4" TRS and XLR combo jack |
| Maximum Input Level | +21 dBu |
| Speaker Output | Neutrik speakON |
| Network Controllers | Compatible with standard 100 MB Ethernet |
| AUX Outputs | Balanced Euroblock 3.5 mm |
| Maximum Output Level | +21 dBu (Aux output) |
| Standby Mode | Euroblock 3.5 mm, close contact to GND for standby mode |
| Preset | Euroblock 3.5 mm, close contact to GND for preset 1-4 recall |
| Data | Data Connection: Euroblock 3.5 mm - GND, 18 V, in, out |
| Outputs | Fault Condition Logic Outputs: 4 / 3.5 mm Euroblock |
| Level Control | Remote DC Level Control: Euroblock 3.5mm - GND, CV, V+ per input |
| Audio Control Module | Dante network audio interface (pre-installed) |
| Attenuation | Per Channel: Front panel, software, offset link group, and remote Fully off = Mute |
| Front Panel LED Indicators | White LED: Power Switch: On, off, flashing (standby mode) Red LED: Protect: On (fault condition or shut down), Off Clip / Mute (Per Channel): Clip @ 1 dB below full output / mute Blue LED: Sleep Mode: On (when the amplifier is asleep from audio inactivity) Yellow LED: Disable: On (when the power switch & front panel attenuators are disabled) Temperature (Per Channel): On dim at 90% maximum operating temperature, full bright + protect at 100% Green LED: Com: On, for Ethernet data or device ID Signal (Per Channel): -18 dBu, below rated output Bridge (Per Channel): On, off Current (Per Channel): Proportional to output |
| Protection Circuits | Inrush current limitation, temperature monitoring, output over-power protection, and mains fuses |
Protea DSP
| Input Source | Protea DSP Options: Analog, auto (net, AES3, analog) |
| Limiter | Brick Wall Limiter Threshold: -20 to 20 dBu Ratio: Infinite Attack: 0.2 to 50 ms/dB Release: 5 to 1000 ms/dB |
| Compressor | Threshold: -20 to +20 dBu Ratio: 1.2:1 to infinite Attack: 0.2 to 50 ms Release 5 to 1000 ms/dB Detector: Peak/Average Attenuation Bus: 2 available Metering: In, Out, Attenuation, Graphical |
| Controls | Autoleveler Controls Target Level: -40 to +20 dBu Action: Gentle, Normal, Aggressive, User-Defined Maximum Gain: 0 to +22 dB Metering: Input, Gain, Attenuation Ratio: 1.2:1 to 10:1 Threshold Below Target: -30 to 0 dB Gain Increase/Decrease Rate: 5 to 1000 ms/dB Hold Time: 0 to 6 sec |
| Ambient Noise Compensation | Output only Max Gain: -20 to +20 dB Min/Base Gain: -40 to +20 dB Gain Change Rate: 0.2 to 20 s/dB Link Group: 16 available ANC Input Channel: 1 to 2 or 1 to 4 Noise Threshold -40 to +20 dBu Program/Ambient Gain Ratio; 0.3:1 to 3:1 Metering: Input level, Attenuation, Average noise |
| Ducking | High/Low Priority, Trigger, Filibuster, Ducked Program Trigger Threshold: -80 to +20 dBu Ducking Release: 5 to 1000 ms/dB Ducking Depth: 0 to -30 dB, -∞ Enable ducking at matrix mixer Metering input |
| Gate | Threshold: -80 to +20 dBu Range: Off, 100 to 0 dB Attack: 0.2 to 50 ms/dB Release: 5 to 1000 ms/dB Metering: Key signal, gate LED, graphical Advanced Gate Controls Key engage enable Key Frequency: 20 Hz to 20 kHz Key Bandwidth: 0.016 to 3.995 octave |
| Gain | Gain (with / without VCA): -50 to 12 dB, off, polarity invert Digital VCA Groups: 4 available Remote RD8C Gain: Enable per channel, 0 dB to -∞ WR-5 (neWR-5) Remote Gain: 0 to -50 dB, mute |
| EQ Type | For FIR Filter Output only, 48 kHz only, 2-384 taps File Type: .csv, .fir For 31-Band Filter Type: Constant Q or proportional Bandwidth: 0.499 octave to 0.25 octave For Parametric 2,4,6, or 10 Band Frequency: 20 to 20 kHz Level: -30 to 15 dB Q Value: 0.016 to 3.995 octave For Hi / Low Shelf 6 / 12 dB/octave Frequency: 20 Hz to 20 kHz Level: -15 to 15 dB For All Pass Frequency: 20 Hz to 20 kHz For Variable Q HP / LP Frequency: 20 Hz to 20 kHz Q Value: 3.047 to 0.267 For Notch / Bandpass Frequency: 20 Hz to 20 kHz Q Value: 92.436 to 0.267 |
| Feedback | 48 kHz Sampling Rate 12 x filters In/Out per filter Lock (per filter) and global lock Filter Modes: Float, restricted, manual Filter Type: Notch, parametric Filter Frequency Range: 20 Hz to 20 kHz Notch Filter: -∞ Parametric Filter: 15 to -30 dB Filter Bandwidth 0.016 to 3.995 Octave Detector Sensitivity: 5 levels Float Time 5 minutes to 24 hours |
| Crossover | 2 Way, 3 Way, 4 Way Crossover & High Pass / Low Pass Filters Bessel & Butterworth Filters: 12 / 18 / 24 / 48 dB/octave Linkwitz-Riley Filter: 12 / 24 / 48 dB / octave Frequency: Off, 20 Hz to 20 kHz |
| Delay | At 48 kHz Sampling Rate (Input Time, Distance & Temperature): Speaker Delay: 0 to 21 ms Delay: 0 to 682 ms At 96 kHz Sampling Rate (Input Time, Distance & Temperature): Speaker Delay: 0 to 10.6 ms Delay: 0 to 341 ms |
| Audio Metering | Range: -60 to 20 dBu Increments: 1 dB Peak Hold Indicator |
| Signal Generator | Pink Noise, White Noise, Sine Wave Signal Level: Off, -50 to 20 dBu Sine Wave Frequency: 20 Hz to 12 kHz |
| Mixer | Matrix Mixer: Gain (0.5 dB Increments): Off, -50 to 12 dB Mute: Per channel Auto-Mixer Enabled: Per channel Global Auto-mixer Response: 0.01 to 2 sec Enable Ducking at Mixer Ducking LED: Per channel if enabled Metering: Level, auto-mixer level |
| Processor | Input A/D, Output D/A: 24 bit DSP Processors: 32-bit floating point Sample Rates: 48 kHz, 96 kHz Propagation Delay @ 48 kHz: 1.42 ms Propagation Delay @ 96 kHz: 0.71 ms |
Power Requirements
| Nominal | Automatic Sensing SMPS: 120 VAC @ 60 Hz 240 VAC @ 50 Hz |
| Operating Range | 70 to 135 VAC @ 60 Hz 140 to 270 VAC @ 50 Hz |
| Power | Minimum Power-Up: 85 VAC @ 60 Hz 170 VAC @ 50 Hz |
| Connector | Power Cable Connector: 20 A powerCON |
| Maximum Output Power | Per Channel, Low-Z Output, All Channels Driven: 2/4/8 Ohms: 400 W |
| Low Impedance | Bridge Mode (All Channels Driven): 4/8 Ohms: 800 W 70 V, 100 V Output (All Channels Driven): 70/100 V (Per Channel): 400 W |
| Power Draw | Sleep Mode: <1 W Standby Mode: 40 W Idle (No Signal): 70 W |
| Maximum Current Draw | All Channels Driven, Typical Input (1/8 Max Power @ 2 Ohms): 5.0 A for 120 VAC 2.5 A for 240 VAC |
| Current Draw | For 120 VAC Sleep Mode: 0.1 A Standby Mode: 0.7 A Idle (No Signal): 1.3 A For 240 VAC Sleep Mode: 0.05 A Standby Mode: 0.35 A Idle (No Signal): 0.65 A |
| Dissipation | Thermal Dissipation: Sleep Mode: <3.4 BTU/hr Standby Mode: 136 BTU/hr Idle (No signal): 238 BTU/hr Typical (1/8 Max Power @ 2 Ohms): 595 BTU/hr |
General
| Cooling | Continuously variable temperature controlled axial fans |
| Environmental | Non-condensing 32 to 113°F (0 to 45°C) |
| Dimensions | 19.00 x 3.50 x 16.84" (483 x 89 x 428 mm) |
| Weight | 25.9 lb (11.7 kg) |