Audemat 4BMINI-FM

Audemat 4BMINI-FM
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Input selection and conditioning:

The Audio Processor Silver 4B-mini FM offers the user input selection between analog and digital. The audio is then routed through optional pre-emphasis filters.

Bass Enhancement:

The Audio Processor Silver 4B-mini FM offers bass enhancement via a peaking filter that can be set to provide up to 6 dB of gain on one of four frequencies with a choice of 4 Q’s.

Multi-band AGC:

The Audio Processor Silver 4B-mini FM processes each band with RMS based levelers. Each band, gain control, and processing function can be configured in different manners to provide different effects. Adjustable timing constants, drive and silence gating afford the user full control of this important stage of the processor.

Multi-Band Limiters:

Each band has its own dynamic peak limiter. Multiple time constant based detectors are adjustable as well as input drive levels.


The Audio Processor Silver 4B-mini FM includes a 4 band equalizer. It allows you to subtly color your sound after the Multi Band Limiter stage, and before the audio goes into the peak processing path.

Bass Clipper :

The Audio Processor Silver 4B-mini FM peak limits (clips) and linear phase filters the low frequencies before these are fed to the final clipper stages.

Distortion Controlled Clipper:

The Audio Processor Silver 4B-mini FM’s main clipper uses sophisticated algorithms to produce tightly peak controlled output and maximum distortion control

Stereo Encoder:

The stereo encoder is highly over-sampled and offers superb stereo performance. A composite clipping function is provided for those who wish to use it.

Software Interface

PC software enables easy local or remote configuration of the Audio Processor Silver. Connection is made through RS232 (serial or USB port) or via TCP/IP. All parameters can be configured with the user friendly interface and the results are displayed on the LED meters, on the front panel and on the configuration screen of the software.

Audemat Audio processors Silver 6B FM input

Impedance >10k. load impedance, electronically balanced

Nominal Input Level

Software adjustable from –12.0 to +12.0 dBu (VU)
Maximum Input Level +24 dBu
Connectors XLR female, floating and symmetrical
A/D Conversion 48KHz 24 bit 128x oversampled delta sigma converter with linear-phase anti-aliasing filter
Filtering RFI filtered
Source Impedance 10 Ohm, electronically balanced and floating
Load Impedance 600 Ohm or greater, balanced or unbalanced
Output Level (100% peak modulation) Software adjustable from –12 dBu to +24 dBu peak, into 600 Ohm or greater load.
Signal-to-Noise >= 90 dB un-weighted (Bypass mode, no pre-emphasis, 20 Hz–15 kHz bandwidth, referenced to 100% modulation)
L / R Crosstalk <= –70 dB, 20 Hz–15 kHz
Distortion <= 0.01% THD (Bypass mode, no pre-emphasis) 20 Hz–15 kHz bandwidth
Connectors  XLR male. Pin 1 chassis ground, Pins 2 (+) and electronically balanced, floating and symmetrical
D/A Conversion 48KHz 24 bit 128x oversampled
Filtering RFI filtered
Frequency response <+-0.1dB, 2Hz – 15kHz
Processing sample rate 48kHz – 768kHz depending on processing stage
Processing resolution internal processors are 24 bit (fixed point) or higher
BNC, floating, EMI suppressed, with high pass filter
19 kHz Pilot Reference BNC, 5V sine unbalanced and floating over chassis ground. Software selectable



Configuration AES/EBU Stereo, 24 bit resolution, software selectable to stereo, mono (left), mono (right) or mono (sum)
Sampling Rate 32, 44.1, 48, 88.2, or 96 kHz, automatically selected
Connector XLR female. Pin 1 chassis ground, pins 2 and 3 transformer balanced and floating, 110 ohm impedance
Filtering RFI filtered
COMPOSITE OUTPUT (FM versions only)
Source Impedance 10 Ohm Single-ended, floating over chassis ground
Load Impedance 600 Ohm or greater
Maximum Output Level +12.0 dBu (peak) software-controlled
Minimum Output Level 0dBu (peak) software-controlled
Pilot Level Adjustable from 6.0% to 12.0% (or OFF), software controlled
Pilot Stability ±1 Hz (10 degrees to 40 degrees C)
Signal-to-Noise Ratio
<= –85 dB (Bypass mode, de-emphasized, 20 Hz – 15 kHz bandwidth
Distortion <= 0.02% THD (Bypass mode, no pre-emphasis, 20 Hz – 15 kHz bandwidth
Stereo Separation Typ. > 70 dB 30 Hz - 15 kHz
Crosstalk, Linear <= –80 dB, main channel to sub-channel or sub-channel to main channel
Crosstalk, Non-Linear <= –80 dB, main channel to sub-channel or sub-channel to main channel
38 kHz Suppression >= 70 dB
76 kHz & Sideband Suppression >= 80 dB
Connector BNC, floating over chassis ground
Filtering RFI filtered