Ashly ne4250.70pe 4-Channel Network Enabled Power Amplifier with Protea DSP and CNM-2 CobraNet Option Card

Description

NE Series Multi-Channel, Network-Enabled Power Amplifiers
Our multi-channel ne (Networked-Enabled) Series Amplifiers are uniquely designed around an energy efficient Class-D platform with a switching power supply.

Connecting and controlling an amplifier for networked systems has now been simplified with ne Amplifiers. This line offers ease of use, setup and control using standard 10/100 Ethernet protocol and Protea ne Software. No special outboard control units are needed.

Choose either the ne4250 (4-channel) or ne8250(8-channel) packages rated at 250W per channel, with separate Hi-Z and Low-Z models. ne Series Amplifiers are offered in two separate platforms-the standard network amplifier or a network amplifier with an on-board Protea DSP Processor. Each can be customized for any installation by adding your choice of AES3 inputs, mic pre inputs, CobraNet or Dante modules.

ne4250.70 with DSP: Architect & Engineering Specs
The four-channel power amplifier shall deliver a minimum power of 250 Watts RMS per channel into 70V loads with all channels operating. When switched into bridged-mono mode, channels 1+2 or 3+4 of the amplifier shall deliver at least 500 Watts RMS into a 140V load. The power amplifier shall include Euroblock input connectors and Euroblock output connectors. It shall have balanced analog inputs.

The power amplifier shall have remote standby for power up, DC remote level control and contact closure preset recall. It shall have Ethernet control and monitoring of power functions, level, mute, polarity, temperature, current, and amplifier fault conditions. Frequency response shall be 20Hz to 20kHz +/-1.0dB. Signal-to-Noise shall be greater than 105dB unweighted and SMPTE intermodulation distortion shall be less than 0.5% into an 8 Ohm load, 10dB below rated output.

The front panel shall provide the status of power, standby, protect, power switch disable, signal level, bridge, over-temperature, over-current, and Ethernet communication. The power amplifier shall have an internal factory installed digital signal processing (DSP) option controlled using Protea (network enabled) software. Each amplifier input channel shall be configured with pluggable DSP blocks to have its own dynamics control, gain functions, graphic and/or parametric EQ, Hi-pass/Lo-pass filters, time delay, metering, and test signal generator.

A mixer section with assignable routing shall allow any input to drive any or all amplifier outputs. Outputs shall have the same DSP functions as inputs, with the addition of FIR filers, and a fast, automated crossover setup. Both inputs and outputs shall copy/paste their settings to other channels, or link with one or more other channels to track their settings. Presets shall be used to store and retrieve global parameters of an amplifier’s control surface and DSP section from a file.

Sub-Presets shall allow for a collection of individual DSP function parameters within and across both channels of an amplifier to be stored and recalled as a set, affecting only those parameters which have been tagged. Up to 35 presets/sub-presets shall be stored within the amplifier, and shall be recalled in real time via Ethernet from a computer using Protea software. The power amplifier will be capable of having factory installed AES3, CobraNet, or Dante interface options. The amplifier shall mount in a standard 19 inch rack using two spaces (3.5. high) and weigh 23 pounds (10.4kg) or less.

Protea Digital Signal Processing for NE Multi-Channel
Protea is compatible with Microsoft Windows 8, 7 (Vista/XP) 32 & 64 bit systems. Audio professionals find our Protea DSP to be very intuitive and easy to navigate – and you will too.

Ashly ne4250.70pe Features
10/100 Ethernet comes standard for remote control and monitoring
FIR Filter capable (with DSP)
DC voltage remote gain control
Switched-mode power supply, Class-D output
Stepped, calibrated input attenuators
Remote power standby
Disable all front panel controls via software
Temperature sensitive variable speed fan with side-to-front airflow
Selectable HPF frequencies (80Hz, 400Hz, off) on 25V, 70V, and 100V models
4-stage level meters
Output current and temp indicators
Safety/Compliance: TUV, CE, FCC, RoHS

Ashly ne4250.70pe Specifications
Front Panel
Controls
Individual input attenuators, AC Power Switch
Cooling
Temp dependent speed-controlled fan (Side-in, Front-out)
LED Indicators
Unit Status
Power: Switch: On, Off (Blue)
Standby: Standby, flashing (Yellow)
Protect: On, Off (Red)
Disable: On, Off (Yellow)
COM: On, for Ethernet data or Device ID (Green)
Each Channel
Signal level: Clip (Red); -6dB (Yellow) and -18dB, -12dB (Green)
Bridge: Per Channel Pair (Green)
Temp: Per Channel (Yellow)
Current: Per Channel: Proportional to output (Green)
Channels
Channels
4
Power
Power Output
8 Ohm: 150W
4 Ohms: 250W
(Continuous Average Power Output: Per Channel, Low Z Models, Stereo Mode, All Channels Driven)
8 Ohm: 500W (Low Z Output: Bridge Mode, All Channels Driven)
Distributed
70V (Per Channel): 250W
Line Current Draw
Standby Mode
190mA
Idle (no signal)
540mA
Typical
2.85A (1/8 Power Pink Noise)
Maximum
6A (1/3 Power Pink Noise)
Thermal Dissipation
Standby Mode
46.7 BTU/hr (All Channels Driven)
Idle (no signal)
123 BTU/hr (All Channels Driven)
Typical
341 BTU/hr (1/8 power pink noise, All Channels Driven)
Maximum
378 BTU/hr(1/3 power pink noise, All Channels Driven)
General
Frequency Response
20Hz-20kHz, (unweighted) +/-1dB
Input Impedance
20k Ohms, Balanced
Voltage Gain
32dB
Input Sensitivity
7.2dBu
Maximum Input Level
+21dBu
Software Controlled Internal HPF
80Hz (12dB/oct), 400Hz (6dB oct), OFF (25V, 70V, 100V models)
Signal to Noise
>107dB (20-20k, Unweighted)
Distortion (8 Ohm load)
<0.5% (SMPTE, typical) <0.5% (THD-N, typical, 20Hz-20kHz) Damping Factor >250 (8 Ohms, 1kHz)
Output Circuitry
Class D
Amplifier/Load Protection
Output Overcurrent, Main Supply Rail Overvoltage, Chassis Temperature, Inrush Limiting, Mains Fuse
Rear Panel
Controls
Ethernet, Channel bridge switch (Low-Z only), Remote Standby, Preset Recall (4), Remote Level (8), Remote Data
Connectors (each channel)
Input: Euroblock
Output: Euroblock
Power Requirement
AC Mains
120VAC or 240VAC +/-10% (factory set), 50-60Hz
Power Cable Connector
15A Edison, 3-Prong IEC
Airflow
Airflow
IN through sides, OUT through front
Environmental
Environmental
40 to 120 degree F (4 to 49 degree C) noncondensing
Certificates
Safety/Compliance
TUV, CE, FCC, RoHS
DSP: Input Source Selection
Input Source Selection Options
Analog, Auto (Net, AES3, Analog)
DSP: Brick Wall Limiter
Threshold
-20dBu to +20dBu
Ratio
infinity
Attack
0.2ms/dB to 50 ms/dB
Release
5ms/dB to 1000ms/dB
DSP: Compressor
Threshold
-20dBu to +20dBu
Ratio
1.2:1 to infinity
Attack
0.2 to 50ms
Release
5ms/dB to 1000ms/dB
Detector
Peak/Average
Attenuation Bus
2 available
Metering
In, Out, Attenuation, Graphical
DSP: Autoleveler Controls
Target Level
-40dBu to +20dBu
Action
Gentle, normal, aggressive, user-defined
Maximum Gain
0dB to +22dB
Metering
Input Level, Gain, Attenuation
Ratio
1.2:1 to 10:1
Threshold Below Target
-30dB to 0dB
Gain Increase/Decrease Rate
5ms/dB to 1000ms/dB
Hold Time
0-6 sec
DSP: Ducking
Trigger Threshold
-80dBu to +20 dBu
Ducking Release
5ms/dB to 1000ms/dB
Ducking Depth
0dB to -30dB, infinity
Enable Ducking at Matrix Mixer
Yes
Metering
Input
DSP: Gate
Threshold
-80dBu to +20dBu
Range
off, 100dB to 0dB
Attack
0.2ms/dB to 50 ms/dB
Release
5ms/dB to 1000ms/dB
Metering
Key Signal, Gate LED, Graphical
DSP: Advanced Gate Controls
Key Engage Enable
Yes
Key Frequency
20Hz to 20kHz
Key Bandwidth
0.016 to 3.995 Octave
DSP: Gain
Gain (with/without VCA)
-50dB to +12dB, off, polarity invert
Digital VCA Groups
4 available
Remote RD8C Gain
Enable per channel, 0dB to infinity
WR-5 (neWR-5) Remote Gain
0 to -50dB, Mute
DSP: EQ (FIR Filter)
File Type
.csv, .fir (Output only, 48kHz only, 2-384 Taps)
DSP: EQ (31-Band)
Filter Type
Constant Q or Proportional
Bandwidth
0.499oct to 0.25oct
DSP: EQ (Parametric 2,4,6, or 10 Band)
Frequency
20-20kHz
Level
-30dB to +15dB
Q Value
0.016 to 3.995 Octave
DSP: EQ (Hi/Low Shelf 6/12 dB/oct)
Frequency
20Hz-20kHz
Level
-15dB to +15dB
DSP: EQ (All Pass)
Frequency
20Hz-20kHz
DSP: EQ (Variable Q HP/LP)
Frequency
20Hz-20kHz
Q Value
3.047 to 0.267
DSP: EQ (Notch/Bandpass)
Frequency
20Hz-20kHz
Q Value
92.436 to 0.267
DSP: Crossover (2 /3/4 Way Crossover)
Bessel & Butterworth Filters
12/18/24/48 dB/oct
Linkwitz-Riley Filter
12/24/48 dB/oct
Frequency
Off, 20Hz-20KHz
DSP: Delay (@ 48kHz Sampling Rate)
Speaker Delay
0-21ms
Delay
0-682ms
DSP: Delay (@ 96kHz Sampling Rate)
Speaker Delay
0-10.6ms
Delay
0-341ms
DSP: Audio Metering Tool
Range
-60dBu to +20dBu
Increments
1dB
Peak Hold Indicator
Yes
DSP: Signal Generator Tool
Signal Level
Off, -50dBu to +20dBu
Sine Wave Frequency
20Hz-12kHz
DSP: Matrix Mixer
Gain (0.5dB increments)
Off, -50dB to +12dB
Mute
Per channel
Enable Ducking at Mixer
Yes
DSP: Processors
Input A/D, Output D/A
24 bit
DSP Processors
32-bit floating point
Sample Rates
48kHz, 96kHz
Propagation Delay @ 48kHz
1.42ms
Propagation Delay @ 96kHz
0.71ms
Physical
Dimensions (W x H x D)
19 x 3.50 x 16.84″ (483 x 89 x 428mm)
Weight
23 lb (10.4kg)