Ashly PEMA Series Four-Channel 250W 25V Protea-Equipped Media Amplifier

PEMA sets a new industry benchmark for value-engineered zone sound systems. By seamlessly merging our powerful, open-architecture DSP functionality paired amplifier performance inside a two-rack space unit, PEMA lowers overall system cost, occupies less space, improves energy efficiency and both speeds and simplifies system installation and programming. Four and eight amplifier channel versions are available at both 125 and 250 Watts per channel. Full 96kHz performance is available on 32-bit SHARC processors for utterly transparent audio.

• CobraNet and Dante network audio fully supported, Dante Transmit now available.
• FIR Filter capable
• 8-in x 4-out sophisticated matrix mixing
• 8 built-in mic pre’s
• Gain sharing automatic microphone mixing (Automixer)
• Automatic feedback suppression
• Ambient noise compensation
• Dedicated telephone/PBX input
• Dual RCA and balanced euroblock inputs
• Post DSP AUX line level outputs
• Stereo summed to mono
• Event scheduling (RTC)
• Adjustable HP/LP filters
• Built-in pink/white noise & sine wave generator
• Full suite of Ashly Protea DSP
• Hot-plug DSP placement
• 96kHz or 48kHz sample rate
• 32-Bit SHARC DSP
• 24-Bit A/D-D/A audio resolution
• 15V phantom power for mic inputs
• Full control using Ashly software over 10/100 baseT Ethernet
• Easy and intuitive user interface
• Automatic DHCP network IP configuration
• Euroblock connectors for preset recall, DC remote level control and serial data control
• External control via Ashly standard wall remotes, Ashly Ethernet wall remotes or Ashly Remote iPad App
• Level control via variable DC control voltage
• Stand-By mode activation via contact closure
• Multi-level Security
• Safety/Compliance: cTUVus, CE, FCC, RoHS

PEMA changes the way consultants and integrators approach sound system design. With only the addition of input sources and output speakers, PEMA delivers an elegant solution with less cabling, less rack space and less installation time, using proven DSP and amplifier technology that will awe clients with its simplicity, sophistication and reliability. In addition to DSP algorithms such as FIR filter capability, ambient noise compensation, advanced automatic feedback suppression, automatic mixer and a full complement of filters, EQs, delays and the like, PEMA offers DSP control of the amplifier functionality as well: selection of bridge-mode operation, HPF settings for constant voltage system networks, stereo-linking of channel pairs, MIC/LINE/TEL-PAGE functions on channel 1, full control of ducking priorities and full-range remote-gain control capability.

PEMA’s I/O count and formats are ideal for small to mid-sized installations. Each variant has eight balanced input channels that are software selectable for mic or line levels. The first channel may also be set for a transformer isolated, TEL-PBX level. Additionally there are eight pairs of summed-mono RCA connectors optimized for consumer line level devices. Eight preamp auxiliary outputs allow integrators to route signals from the matrix mixer to anywhere the system requires.

As a member of the respected Protea DSP lineage, PEMA is remarkably easy to program and deploy. All set up is accomplished using standard 10/100 Ethernet protocol and our Protea ne Software on a PC platform. Hot-plug DSP placement allows users to insert any function into any channel block, even when running live audio. Automatic DHCP network IP configuration reduces network set up time. Lockable front panel controls and multi-level software security with password access guarantee a tamper- proof audio system.

Digital Signal Processing for PEMA
Audio professionals find our Protea DSP to be very intuitive and easy to navigate-and you will too. No need to attend a one-week training class away from home to learn our software. Common sense layout of controls and features, on-line help or a visit to the Technical Support page on our website provides answers to all of your questions.

Ashly PEMA 4250.25 Features
CobraNet and Dante network audio fully supported, Dante Transmit now available.
FIR Filter capable
8-in x 8-out sophisticated matrix mixing
8 built-in mic pre’s
Gain sharing automatic microphone mixing (Automixer)
Automatic feedback suppression
Ambient noise compensation
Dedicated telephone/PBX input
Dual RCA and balanced euroblock inputs
Post DSP AUX line level outputs
Stereo summed to mono
Event scheduling (RTC)
Adjustable HP/LP filters
Built-in pink/white noise & sine wave generator
Full suite of Ashly Protea DSP
Hot-plug DSP placement
96kHz or 48kHz sample rate
32-Bit SHARC DSP
24-Bit A/D-D/A audio resolution
15V phantom power for mic inputs
Full control using Ashly software over 10/100 baseT Ethernet
Easy and intuitive user interface
Automatic DHCP network IP configuration
Euroblock connectors for preset recall, DC remote level control and serial data control
External control via Ashly standard wall remotes, Ashly Ethernet wall remotes or Ashly Remote iPad App
Level control via variable DC control voltage
Stand-By mode activation via contact closure
Multi-level Security
Safety/Compliance: TUV, CE, FCC, RoHS

Ashly PEMA 4250.25 Specifications
Amplifier
Channels
4
Constant Voltage
25V (per channel): 250W; 20Hz-20kHz, 1% THD, All Channels Driven
Line Current Draw: Standby Mode
190mA
Line Current Draw: Idle (no signal)
540mA
Line Current Draw: Typical
2.85A (1/8 power pink noise)
Line Current Draw: Maximum
6.00A (1/3 power pink noise)
Thermal Dissipation: Standby Mode
46.7 BTU/hr
Thermal Dissipation: Idle (no signal)
123 BTU/hr
Thermal Dissipation: Typical
341 BTU/hr (1/8 power pink noise)
Thermal Dissipation: Maximum
378 BTU/hr(1/3 power pink noise)
Signal to Noise
>105dB (20Hz-20kHz, Unweighted)
Damping Factor
>250 (8 Ohm load, <1kHz) Distortion <0.5% (SMPTE, typical) <0.5% (THD-N, typical, 8 Ohm, 10dB below rated power, 20Hz-20kHz) Channel Separation -80dB (dB from full output, 1kHz) Frequency Response 20Hz-20kHz, +/-1dB Mic/Line Input Impedance 4.8k Ohms Mic/Line Maximum Input Level +21dBu Mic/Line Preamp Gain 0, +20dB, +40dB, +60dB Mic/Line Phantom Power +15V, switchable Channel 1-4, 5-8 Summed Mono 3.16k Ohm (Input Impedance) +11dBu (Maximum Input Level) Channel 1 TEL-PBX 3.9k Ohm (Input Impedance) +21dBu (Maximum Input Level) Preamp Output Maximum Level +8dBu AUX Output Maximum Level +20dBu Rear Panel Controls Ethernet 10/100, Channel 1 TEL-PBX Switch, Remote Standby, Preset Recall (4), Remote Level (8), Remote Data Connectors (each channel) Input: Euroblock Output: Euroblock 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) LED Indicators: Each Channel Signal level: Clip/Mute (Red); -6dB (Yellow) and -18dB, -12dB (Green) Bridge: Per Channel Pair (Green) Temp: Per Channel (Yellow) Current: Per Channel: Proportional to output (Green) Audio Connections 1 Euro connector balanced input, selectable for Mic, Line or TEL-PBX 7 Euro connector balanced inputs, software selectable for Mic or Line 8 pairs of unbalanced, summed mono RCA connectors optimized for consumer line level (-10dBV nominal) devices 8 Euro connector Preamp/Aux outputs 4 Euro connector speaker outputs CobraNet and Dante Digital I/O options AC Mains 120VAC or 240VAC, +/-10% 50-60Hz Power Cable Connector 15A Edison, 3-Prong IEC Airflow IN through sides, OUT through front Environmental 40 to 120 deg. F (4 to 49 deg. C) noncondensing DSP Input Source Select Analog, Auto (Net, AES3, Analog) Brick Wall Limiter: Threshold -20dBu to +20dBu Brick Wall Limiter: Ratio Infinite Brick Wall Limiter: Attack 0.2ms/dB to 50 ms/dB Brick Wall Limiter: Release 5ms/dB to 1000ms/dB Compressor: Threshold -20dBu to +20dBu Compressor: Ratio 1.2:1 to infinite Compressor: Attack 0.2 to 50ms Compressor: Release 5ms/dB to 1000ms/dB Compressor: Detector Peak/Average Compressor: Attenuation Bus 2 available Compressor: Metering In, Out, Attenuation, Graphical AutoLeveler Controls: Target Level -40dBu to +20dBu AutoLeveler Controls: Action Gentle, normal, aggressive, user defined AutoLeveler Controls: Maximum Gain 0dB to +22dB AutoLeveler Controls: Metering Input, Gain, Attenuation AutoLeveler Controls: Ratio 1.2:1 to 10:1 AutoLeveler: Threshold Below Target -30dB to 0dB AutoLeveler Controls: Gain 5ms/dB to 1000ms/dB (Increase/Decrease Rate) AutoLeveler Controls: Hold Time 0-6 sec Ambient Noise: Max Gain -20dB to +20dB Ambient Noise: Min/Base Gain -40dB to +20dB Ambient Noise: Gain Change Rate 0.2s/dB to 20s/dB Ambient Noise: Link Group 16 available Ambient Noise: ANC Input Channel 1-4 or 1-8 Ambient Noise: Noise Threshold -40dBu to +20dBu Ambient Noise:Program/Ambient Gain Ratio 0.3:1 to 3:1 Ambient Noise: Metering Input level, Attenuation, Average noise Ducking: Trigger Threshold -80dBu to +20 dBu Ducking: Ducking Release 5ms/dB to 1000ms/dB Ducking: Ducking Depth 0dB to -30dB, infinity Ducking: Enable Ducking at Matrix Mixer Yes Ducking: Metering Input Gate: Threshold -80dBu to +20dBu Gate: Range Off, 100dB to 0dB Gate: Attack 0.2ms/dB to 50 ms/dB Gate: Release 5ms/dB to 1000ms/dB Gate: Metering Key Signal, Gate LED, Graphical Key Engage Enable Yes Key Frequency 20Hz to 20kHz Key Bandwidth 0.016 to 3.995 Octave Gain (with/without VCA) -50dB to +12dB, off, polarity invert Gain Digital VCA Groups 4 available Remote RD8C Gain Enable per channel, 0dB to infinity WR-5 (neWR-5) Remote Gain 0 to -50dB, Mute EQ: File Type .csv, .fir (Output only, 48kHz only, 2-384 Taps) EQ: 31-Band Filter Type Constant Q or proportional EQ: Bandwidth 0.499oct to 0.25oct EQ: Parametric 2,4,6, or 10 Band Frequency: 20-20kHz Level: -30dB to +15dB Q Value: 0.016 to 3.995 Octave EQ: Hi/Low Shelf 6/12 dB/oct Frequency: 20Hz-20kHz Level: -15dB to +15dB EQ: All Pass Frequency: 20Hz-20kHz EQ: Variable Q HP/LP Frequency: 20Hz-20kHz Q Value: 3.047 to 0.267 EQ: Notch/Bandpass Frequency: 20Hz-20kHz Q Value: 92.436 to 0.267 Feedback Suppressor: Filters 12 Feedback Suppressor: In/Out per filter Yes Feedback Suppressor:Filter & global lock Yes Feedback Suppressor: Filter Modes Float, Restricted, Manual Feedback Suppressor: Filter Type Notch, Parametric Feedback Suppressor: Filter Frequency Range 20Hz to 20kHz Feedback Suppressor: Notch Filter Infinity Feedback Suppressor: Parametric Filter +15dB to -30dB Feedback Suppressor: Filter Bandwidth 0.016 to 3.995 Octave Feedback Suppressor:Detector Sensitivity 5 levels Feedback Suppressor: Float Time 5 minutes to 24 hours Crossover: 2/3/4 Way & HP/LP Filters Bessel & Butterworth Filters: 12/18/24/48 dB/oct Linkwitz-Riley Filter: 12/24/48 dB/oct Frequency: Off, 20Hz-20KHz Speaker Delay at 48kHz Sampling Rate 0-21ms (Input Time, Distance & Temperature) Delay at 48kHz Sampling Rate 0-682ms (Input Time, Distance & Temperature) Speaker Delay at 96kHz Sampling Rate 0-10.6ms (Input Time, Distance & Temperature) Delay at 96kHz Sampling Rate 0-341ms (Input Time, Distance & Temperature) Audio Metering Tool: Range -60dBu to +20dBu Audio Metering Tool: Increments 1dB Audio Metering Tool: Peak Hold Indicator Yes Signal Level Off, -50dBu to +20dBu Sine Wave Frequency 20Hz-12kHz Matrix Mixer: Gain (0.5dB increments) Off, -50 to +12dB Matrix Mixer: Mute Per channel Auto-mixer Enabled Per channel Global Auto-mixer Response 0.01sec to 2sec Enable Ducking at Mixer Yes Ducking LED Per channel, if enabled Metering Level, auto-mixer level Input A/D, Output D/A 24 bit DSP Processors 32-bit floating point Sample Rates 48kHz, 96kHz Propagation Delay at 48kHz 1.42ms Propagation Delay at 96kHz 0.71ms General Dimensions (WxHxD) 19 x 3.5 x 16.84" (48.26 x 8.89 x 42.77cm) Weight 23.5 lbs (10.66kg)