• QM-AE4: Front
  • QM-AE4: Rear

QuickMedia® Quad Audio Extractor

QM-AE4

Provides the equivalent of (4) QM-AE1 Audio Extractors in a single rack space. Extracts the stereo program and (2) speech/microphone audio signals from four separate QuickMedia signals. Can be inserted inline, or installed as a QM endpoint. More Details


Crestron® MediaManager is a comprehensive family of affordable products fusing high-performance AV signal distribution, device control, and facility-wide system management. MediaManager simplifies the art of ProAV system design and installation with complete hardware, software, and low-cost wiring solutions. Whether installing a single boardroom or a campus-wide network of AV systems, MediaManager delivers power and value far beyond conventional products and designs.

The QM-AE4 is a single-space rack mount unit containing the equivalent of four QM-AE1 QuickMedia Audio Extractors. Its four independent extractors provide the ability to extract the stereo program and microphone audio signals from four separate QuickMedia feeds to drive a power amplifier or other audio device. Each QM Audio Extractor may be inserted anywhere along the QM signal path without affecting the audio, video, and computer signals passing through it. For ultimate flexibility, any of the QM-AE4's extractors may operate as a QM endpoint, effectively functioning as a QM audio receiver.

QuickMedia® Transport
The revolutionary QuickMedia transport routes all audio, video, and RGB computer signals over a single inexpensive CAT5e type cable. Stereo audio and microphone signals are transmitted digitally over QuickMedia with high-performance 24-bit resolution.

High-Performance Audio
The QuickMedia transport carries four channels of 24-bit digital audio comprising a stereo program signal and two discrete microphone signals. Within any of the QM-AE4's four audio extractors, the two incoming microphone signals are each processed separately by a 4-band speech-optimized graphic equalizer. Versatile 4x4 matrix mixing allows the mic signals and stereo program signal to be precisely adjusted and routed to any of four audio outputs. These outputs are configured as one stereo program channel and two discrete mono speech channels, perfect for feeding a Crestron QM-Series 3-channel amplifier along with other recording and assistive listening equipment. All outputs are balanced line-level for proper integration with professional and semi-pro gear.

Professional DSP
The QM-AE4 lets you control and optimize your system's audio performance without the need for additional outboard processors. Each output channel includes programmable volume, bass, treble, and mute, plus ten-band graphic equalization and 2-band parametric equalization. In addition, each speech output includes up to 40 ms of delay adjustment for proper ceiling speaker alignment. All audio processing and mixing is performed in the digital domain, adjustable at setup using Crestron QM Tools software (part of Crestron Toolbox™).

MediaManager System Integration
The QM-AE4 affords seamless audio signal routing and control under the command of a MediaManager control system. Many parameters are controllable in real-time from a keypad or touchpanel, and numerous presets can be saved for instant recall. A complete MediaManager system is easy to design, program and adjust from start to finish using Crestron SystemBuilder™ software.

  • An ideal QM signal interface for any QM-Series 3-channel amplifier
  • Each extractor functions as a QM midpoint or endpoint device
  • Extracts QuickMedia audio signals
  • Features professional balanced line-level outputs
  • Includes built-in digital mixing, signal routing, equalization, and delay processing
  • Inserts transparently in the QM signal path
  • Provides four independent QM audio extractors
  • Provides stereo program and 2 discrete speech outputs per extractor
  • Single-space rack-mountable

Bass Control ±15.0 dB @ 150Hz shelf per output
D-A Conversion 24-bit, 48 kHz 
Features (x4) 4x4 mic/program matrix, 2-channels mic EQ at input, stereo volume/tone control and EQ on PROGRAM output, mono volume/tone control and EQ/delay on each MIC output
Frequency Response 20Hz to 20kHz ±0.25 dB
Input Compensation ±10.0 dB per input
Input Compensation Presets 1 thru 256
Mic Input EQ Presets 1 thru 10
Mic Input EQ Center Frequencies 160, 500, 1.2k, 3k Hz
Mic Input EQ Gain ±12.0 dB per band
Mic Input EQ Mode 4-band graphic per mic input
Mixer Presets 1 thru 5
Mixer Volume Range -80.0 to 0.0 dB per input
Output EQ Mode 10-band graphic + 2-band parametric per output
Output GEQ Center Frequencies 31, 63, 125, 250, 500, 1k, 2k, 4k, 8k, 16k Hz
Output GEQ Gain ±12.0 dB per band
Output GEQ Presets 1 thru 10
Output PEQ Bandwidth 0.1 to 3.0 octaves per band
Output PEQ Center Frequency 25 to 20,000 Hz per band
Output PEQ Gain ±12.0 dB per band
Output PEQ Presets 1 thru 5
Output PEQ Types Low Pass, High Pass, Peaking Eq, Notch, Treble Shelf, Bass Shelf
Output Volume Range -80 to +20 dB, adjustable from 0% to 100%, plus mute, per output
S/N Ratio 90dB 20Hz to 20kHz A-weighted 
Speech Output Delay 0 to 40 ms per MIC output
THD+N 0.015% 20Hz to 20kHz
Treble Control ±15.0 dB @ 4kHz shelf per output
NET (1) amber LED, indicates communication with Cresnet system
PWR (1) green LED, indicates 24 Volts DC power supplied from Cresnet control network
SETUP (rear) (1) miniature pushbutton and red LED, used for touch-settable ID (TSID)
Cresnet Cresnet slave device
QuickMedia QM midpoint or endpoint device[1], QM auto-compensation with self-peaking
AUDIO OUT 1 – 4, MIC 1 – 2 (1) 5-pin 3.5mm detachable terminal blocks;
Two-channel “speech” balanced line-level audio outputs;
Output Impedance: 200 ohms balanced, 100 ohms unbalanced;
Maximum Output Level: 4 Vrms balanced, 2 Vrms unbalanced
AUDIO OUT 1 – 4, PROG L – R (4) 5-pin 3.5mm detachable terminal blocks;
Stereo “program” balanced line-level audio outputs;
Output Impedance: 200 ohms balanced, 100 ohms unbalanced;
Maximum Output Level: 4 Vrms balanced, 2 Vrms unbalanced
G (1) 6-32 screw, chassis ground lug
IN 1 – 4 (4) QuickMedia input ports with Cresnet pass-thru, each comprised of (1) 8-wire RJ45 female (QM) and (1) 4-pin 3.5mm detachable terminal block (Cresnet);
Connect to QM output ports of other QuickMedia devices via CresCAT-QM cable[1];
NOTE: Each Cresnet IN port is paralleled with the adjacent Cresnet OUT port only; the Cresnet IN/OUT ports are for pass-thru only and do not terminate internally.
NET (2) 4-pin 3.5mm detachable terminal blocks
Cresnet slave ports, paralleled
Connect to Cresnet control network via CRESNET cable
OUT 1 – 4 (4) QuickMedia output ports with Cresnet pass-thru, each comprised of (1) 8-wire RJ45 female (QM) and (1) 4-pin 3.5mm detachable terminal block (Cresnet);
Connect to QM input ports of other QuickMedia devices via CresCAT-QM cable[1];
NOTE: Each Cresnet OUT port is paralleled with the adjacent Cresnet IN port only; the Cresnet IN/OUT ports are for pass-thru only and do not terminate internally.
Depth 8.55 in (217 mm)
Height 1.80 in (46 mm);
1.70 in (44 mm) without feet
Width 17.07 in (434 mm)
Chassis Metal, black matte powder coat finish
Faceplate Extruded aluminum, black matte powder coat finish with polycarbonate label overlay
Mounting Freestanding or 1U 19-inch rack-mountable (adhesive feet and rack ears included)
Heat Dissipation 69 BTU/Hr
Humidity 10% to 90% RH (non-condensing)
Temperature 41° to 104°F (5° to 40°C)
Cresnet Power Usage 20 Watts (0.83 Amp @ 24 Volts DC)
Provides unbuffered, unprocessed pass-thru of video/RGB portion of QM signal; does not affect delay skew, bandwidth, or gain
3.8 lb (1.7 kg)

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