Powered Matrix Processors
protea êquipped media amplifier
pêma specifications
pêma 4125 | 4250 | 8125 | 8250
The World’s First Powered Processors
Ashly Audio’s promise to “Simplify Integration” continues with pêma (Protea
Equipped Media Amplifier), a unique powered processor. Pêma sets a new
industry benchmark for value-engineered zone sound systems. By seamlessly
merging Ashly’s powerful, open-architecture DSP functionality with Ashly’s
renowned amplifier performance inside a two-rack space unit, pêma 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. Depending on the configuration,
pêma’s MSRP spans a modest $2,000 to $4,000, putting its benefits-to-costs
ratio through the roof.
Pêma changes the way consultants and integrators approach sound system design. With only the addition of input sources and output speakers,
pêma is capable of handling everything else for small- to mid-sized sound
systems. Pêma is a ‘house-of-worship-in-a-box’ or a ‘restaurant-in-a-box’
or a ‘bar-in-a-box’ or a ‘you-name-it-in-a-box.’ Pêma 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 ambient noise compensation, advanced automatic feedback suppression, automatic mixer, and a full complement of filters, EQs, delays, and the like, pêma 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.
Pêma’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. Both CobraNet and EtherSound digital I/Os
are fully supported.
As a member of the respected Protea DSP lineage, pêma is remarkably
easy to program and deploy. All set up is accomplished using standard
10/100 Ethernet protocol and Ashly’s 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 multilevel software security with password access guarantee a tamperproof
audio system.
• 4 or 8-channel amplifier - 125 or 250 watts per channel
• 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
• Extensive signal processing
• Full suite of Ashly NE Series 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
• Full control using Ashly software over 10/100 baseT Ethernet
• Easy and intuitive user interface
• Automatic DHCP network IP configu
• Euroblock connectors for preset recall, DC remote level control and data in/out
• External control via Ashly standard wall remotes or Ashly Ethernet wall remotes
• Level control via variable DC control voltage.
• Stand-By mode activation via con
tact closure.
• Multi-level Security
• Five year worry-free warranty
Audio Connections:
•1 Euro connector balanced input, software 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) devices
• 8 Euro connector Preamp Aux out
• 8 Euro connector amplifier outputs
Digital I/O Options:
• CobraNet
• Ethersound
© 2010 | Ashly Audio, Inc. | 847 Holt Road | Webster | NY | 14580 | U.S.A. | www.ashly.com | info@ashly.com
* All features, specifications and graphical representations are subject to change or improvement without notice.
Series specifications
protea êquipped media amplifier
pêma 4125 | 4250 | 8125 | 8250
Amplifier Specifications
DSP Specifications
Continuous Average Power Output Per Channel
Brick Wall Limiter
2, 4, 6, or 10 Band Parametric Equalizers
Low Z models, Stereo Mode, all channels driven
Threshold: -20dBu to +20dBu
8Ω 20Hz-20kHz 1%THD 75W
Ratio: infinite
Frequency: 20-20kHz
4Ω 20Hz-20kHz 1%THD
Level: -30dB to +15dB
Release: 5ms/dB to 1000ms/dB
Q: 0.016oct to 4oct
Hi/Low Shelf 6/12 dB
Threshold: -20dBu to +20dBu
Frequency: 20Hz-20kHz
Ratio: 1.2:1 to infi nite
Level: -15dB to +15dB
Attack: 0.2 to 50ms
All Pass
Low Z models, Bridge Mode, all channels driven
8Ω 20Hz-20kHz 1%THD
70V, 100V distributed output models
20Hz-20kHz 1%THD, per channel
Line Current Draw (120V, all channels driven)
Line Current, Standby mode
Release: 5ms/dB to 1000ms/dB
Frequency: 20Hz-20kHz
Line Current, Idle (no signal)
Detector: Peak/Average
Variable Q HP/LP
Line Current, Typical (1/8 power pink noise) 1.70A/2.78A
Frequency: 20Hz-20kHz
Line Current, Maximum (1/3 power sine wave) 3.72A/5.78A
Target Level: -40dBu to +20dBu
Q: 3.047 to 0.267
Action: gentle, normal, aggressive,
Thermal Dissipation (all channels driven)
BTU/hr, Standby mode
Maximum Gain: 0dB to +22dB
Frequency: 20Hz-20kHz
BTU/hr, Idle (no signal)
Advanced Autoleveler Controls
Q: 92.436 to 0.267
BTU/hr, Typ (1/8 power pink noise
Ratio: 1.2:1 to 10:1
Feedback Suppressor
BTU/hr, Max (1/3 power sine wave)
Threshold Below Target: -30dB to 0dB
Filters: 12
Gain Increase Rate: 5ms/dB to 1000ms/dB
Modes: Float, Restricted, Manual
General Specifications
Input Sensitivity (low Z models 4..)
Gain Decrease Rate: 5ms/dB to 1000ms/dB Type: Notch, Parametric
Input Sensitivity (70V and 100V models)
Hold Time: 0-6 sec
Frequency Range: 20Hz to 20kHz
Voltage Gain (low Z models)
Ambient Noise Compensation
Notch Filter: - infinity
Voltage Gain (70V models)
Max Gain: -20dB to +20dB
Parametric Filter: +15dB to -30dB
Voltage Gain (100V models)
Min/Base Gain: -40dB to +20dB
Filter Bandwidth: 0.016 to 3.995 Octave
Damping Factor (8 ohm load, <1kHz)
Gain Change Rate: 0.2s/dB to 20s/dB
Detector Sensitivity: five levels
Distortion (SMPTE, typical)
Noise Threshold: -40dBu to +20dBu
Float Time:5 minutes to 24 hours
Distortion (THD-N, typical) 8Ω 10dB below
rated power, 20Hz-20kHz
Program/Ambient Gain Ratio: 0.3:1 to 3:1
Channel Separation (dB from full output, 1kHz) -80dB
2 Way, 3 Way, 4 Way Crossover
Signal to Noise (20Hz-20KHz, unweighted) >102dB
Trigger Threshold: -80dBu to +20 dBu
Filter Types:
Release: 5ms/dB to 1000ms/dB
Bessel: 12/18/24/48 dB/oct
Depth: 0dB to -30dB, -‡
Butterworth: 12/18/24/48 dB/oct
Linkwitz-Riley: 12/24/48 dB/oct
Threshold: -80dBu to +20dBu
Frequency: off, 20Hz-20KHz
Range: off, 100dB to 0dB
Attack: 0.2ms/dB to 50 ms/dB
@ 48kHz Sampling Rate
Release: 5ms/dB to 1000ms/dB
Speaker Delay: 0-21ms
Advanced Gate
Delay: 0-682 ms
Key Engage Enable: Yes
@ 96kHz Sampling Rate
Key Frequency: 20Hz to 20kHz
Speaker Delay: 0-10.6ms
Key Bandwidth: 0.016 to 3.995 Octave
Delay: 0-341 ms
31 Band Graphic
Signal Generator
Filter Type: constant Q or proportional
pink noise, white noise, sine wave
Frequency Response
20Hz-20kHz, +/-1dB
Mic/Line Input Impedance
Mic/Line Maximum Input Level
Mic/Line Preamp Gain
0, +20dB, +40dB, +60dB
Mic/Line Phantom Power
+15V, channel
+15V, channel
Summed Mono Input Impedance
Summed Mono Maximum Input Level
TEL-PBX Input Impedance
TEL-PBX Maximum Input Level
Preamp Output Maximum Level
AUX Output Maximum Level
Balanced Mic/Line Input Connector
Euroblock 3.5mm
Unbalanced Summed Mono Input Connector Dual RCA
Channel 1 TEL-PBX Input Connector
Euroblock 3.5mm
Preamp/AUX Output Connector
Euroblock 3.5mm
Speaker Output Connector
Euroblock 7.62mm
Bandwidth: 0.499/oct to 0.25/oct
Input A/D: 24 bit
Output D/A: 24 bit
DSP Processors: 32-bit fl oating point
Sample Rates: 48kHz, 96kHz
Propagation Delay @ 48kHz: 1.42 ms
Propagation Delay @ 96kHz: 0.71 ms
0dBu = 0.775 VRMS
1) Measured 20 Hz – 20 kHz unweighted using AES17 LPF at 48 kHz sample rate.
3) Analog in to analog out measured using internal master clock.
4) Zero noise or signal amplitude variation introducted in digital domain.
5) Latency of network audio link is additional to latency of digital audio processor.
6) All features, specifications and graphical representations are subject to change or improvement without notice.
Ashly Audio, Inc.
847 Holt Road
Webster, New York USA 14580-9103
P: 800-828-6308, +1-585-872-0010
F: +1-585-872-0739
www.ashly.com info@ashly.com
Specifications subject to change without prior notice.
Latest information available at www.ashly.com.
© 2010 Ashly Audio, Inc.
Printed in U.S.A. 05/10