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HomepageMonitoringPower Amps › Ashly PEMA-4125.70
Ashly PEMA-4125.70

The Ashly PEMA-4125.70 with Protea DSP it's very intuitive and easy to navigate. PEMA changes the way consultants and integrators approach sound system design.

Pema is a Protea-Equipped Media Amplifier-either 4 or 8-channel at 250-watts or 125-watts per channel. Pema is a matrix mixer-all Pema models have a full 8-in x 8-out matrix mixer, where any input can be assigned to any output or outputs. Pema is a digital signal processor. In addition to the full Protea™ suite of DSP settings, we have added four new features to Pema-gain sharing automatic microphone mixing, an automatic feedback suppressor, ambient noise detection and adjustment and a real-time clock with an event scheduler.

Pema features Ashly's energy efficient Class-D amplifier topology with a switching power supply-and is over 80% energy efficient out of the box. Maximize the energy efficiency of your audio system by using the event scheduler to either put the Pema in stand-by mode or turn it off completely.

The powered digital signal processor shall consist of eight inputs and four power amplifier outputs with the ability to assign any input to any output. Each input channel shall include a summed stereo (RCA, +11dB maximum) and mic/line gain stage (3-pin Euroblock, +21dB maximum) capable of 0, +20dB, +40dB, and +60dB of gain with +15V phantom power when selected. Summed stereo input impedance shall be 3.16k Ohms unbalanced and mic/line input impedance shall be 4.8k Ohms active balanced. Channel One shall include a transformer-isolated TEL-PBX select. Each input and output shall have individual mute capability. Each input and output shall have six processing blocks configurable for Dynamics (ambient noise compensation, compressor/limiter, auto-leveler, ducker, gate), Gain (including Group VCA and remote gain), Equalization (FIR filters, 31-band graphic, parametric x 10, feedback suppressor), Crossover, Delay, Metering, and Signal Generator (sine wave, pink noise, white noise).

The routing stage shall allow the user to assign an input to any or a combination of outputs and separately adjust how much signal level goes to each output (matrix mixer). The matrix mixer shall also have selectable gain-sharing automatic mixing capability. Each input stage shall have an additional preamp output (post DSP) on the back panel (3-pin Euroblock). Four powered outputs shall deliver 125W @ 70V (7.62mm Euroblock), and channel pairs can be bridged for 250W @ 140V. Frequency response shall be ±1dB 20Hz to 20kHz. Signal-to-Noise shall be greater than 102dB, 20Hz - 20kHz unweighted. LED indicators shall show signal level (-18, -12, -6), clip/mute, bridge, over temperature and over current conditions.

Output levels shall be adjusted by front panel volume controls when enabled. Full programming and control of the unit shall be from the rear panel RJ-45 jack connected to a 10/100BASE-T Ethernet LAN connected to a PC running Ashly's Protea NE Software. Thirty internal presets (scenes) shall be standard and four scenes shall be accessible via contact closure. The powered digital processor shall have Cobranet and Dante factory option. A back panel contact closure shall place the unit in "Standby" reducing power consumption when idle.

The power switch shall be enabled or disabled as needed. Five password user names and eight levels of security shall be available. A temperature dependent speed-controlled axial fan shall maintain the correct operating temperature. The unit shall weigh 18.5 lbs net and mount in a standard 19" rack using 2 spaces (3.5" high).
  • CobraNet® and Dante® network audio fully supported
  • 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: cTUVus, CE, FCC, RoHS
  • Specifications
  • Input Sensitivity (Low Z models) : 3.2dBu (4125/8125) 6.2dBu (4250/8250) 7.2dBu (70V/100V models)
  • Voltage Gain : 26dB (Low Z models), 32dB (70V models) 35dB (100V models)
  • 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 ch. 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
  • Environmental : 40-120 deg. F, (4-49 deg, C) (noncondensing)
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    For more information about the PEMA-4125.70, please visit the website of Ashly
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