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AF M5.11 bit DSP Amplifier | 1200 W | 11 CH DSP + 4 x 150 W @ 2 ohm + 1 x 600 W @ 2 ohm | D-class Fully Bridgeable

AF M5.11 bit boasts five high-fidelity amplified channels 100W x 4 + 400W @4Ω*, 150WP x 4 + 600W @2Ω* with the audiophile sound of the latest generation Audison D-Class technology. Higher switching frequencies, steeper filtering, and higher-tolerance components deliver sound above and beyond the expectation of Class D – in an amazingly compact package! This is combined with native DSP working at 24 bit/96 kHz, extending the audio band up to 40 kHz and earning the coveted High-Resolution certification. Bridging channel pairs results in 200W x 2 + 400W @4Ω*, guaranteeing flexible and powerful performance. Support for the Audison B-CON’s Absolute Volume function guarantees maximum bit depth, even with wireless connections! Output Continuous Power (RMS) @14.4 VDC, 1% THD, all channels driven.

Amplifier Tech Data

Channels 5
Class D-Class
Power supply voltage / fuse 11 ÷ 15 VDC / 2 x 30A
Operating power supply voltage 6.5 ÷ 17.5 VDC
Idling current 1.5 A
Standby Current Draw 1.5 mA
Consumption @ 14.4 VDC, 2Ω, Max Musical Power 53.4 A
Remote IN 4 ÷15 VDC (1 mA)
Remote OUT 6.5 ÷15 VDC (150 mA)
ART - Automatic Remote Turn on/ off from OUTPUT BTL speakers 1.5V DC
Efficiency Rated Power 80.5%

Amplifier Stage

Distortion - THD @ 1 kHz, 4Ω, 70% Rated Power 0.02%
Bandwidth @ -1.5 dB 10 Hz ÷ 42 kHz
Damping factor @ 1 kHz, 4Ω, 2 VRMS 100 kHz , 4Ω, 2 VRMS SUB Channel): 140 | 1 kHz , 4Ω, 2 VRMS: 140
S/N ratio (A weighted @ 1 V Input) Master Input 98 dBA
S/N ratio (A weighted @ 1 V Input) Optical Input 105
Total Power RMS 1200 W
Minimum load impedance
Output Continuous Power (RMS) @14.4 VDC, 1% THD 5 Ch @ 4Ω: 100 W x 4 + 400 W x 1

5 Ch @ 2Ω: 150 W x 4 + 600 W x 1

3 Ch (Bridge 1/2; 3/4) @ 4Ω: 300 W x 2 + 400 W x 1

3 Ch (Bridge 1/2; 3/4) @ 4Ω / 2Ω: 300 W x 2 + 600 W x 1
Adjustable Crossover Yes

CEA Specifications

Output power @ 4Ω, 1% THD+N, 14.4 V 85 W x 4 + 340 W x 1
SN ratio (ref. 1W output) 78 dB

Inputs / Outputs

Pre-In Inputs 0.6 ÷ 6 VRMS (15 kΩ Imp.)
Digital Input Yes
Pre Outputs 6
Hi Level Inputs 8
Low Level Inputs 8
Speaker-In Inputs 2.2 ÷ 22 VRMS (5 Ω Imp.)
Digital IN 1 x Optical S/PDIF; Max 192 kHz / 24 bit + 1 x Optical/Coaxial S/PDIF with optional F2O card
Sub Out (RCA Pre Out) 5V RMS

Digital Signal Processor

Audio DSP Converter Analog Devices ADAU1467 automotive qualified audio processor.

Processing @ 96 kHz.Analog Devices 3 x ADAU1978 (4ch) and ADAU1966A (16ch) A/D and D/A converters (24 bit/192 kHz) providing very high level performance
Filter mode and slope Linkwitz-Riley @ 12/24/36/48 dB/Oct.
Butterworth @ 6/12/18/24/30/36/42/48 dB/Oct.
Bessel @ 6/12/18/24/30/36/42/48 dB/Oct.
Chebyshev @ 6/12/18/24/30/36/42/48 dB/Oct.

QLP @ 6 dB/Oct.
Crossover frequency 20 Hz ÷ 20 kHz
Phase control 0° / 180°, All-Pass filters
Analog Input Equalizer (20 ÷ 20k Hz) 12 Biquad + Delay
Output Equalizer Parametric/Graphic Biquad: 15 poles, 20 Hz ÷ 20 kHz
Time Alignment Distance 0 ÷ 510 cm / 0 ÷ 200.8 inches
Time Alignment Delay 0 ÷ 15 ms
Input Output Real Time Audio Monitor RTA

Control Connections

DRC Port Input for DRC AC remote control (Optional)
ADC Port Manage other Audison devices that support this standard
1 Wire Customizable functions (+ 12 V activated)
2 Wire Customizable functions (+ 12 V activated)

General Requirements

PC connections Micro USB 1.1 / 2.0 / 3.0 Compatible
Software/PC requirements Windows 10, Windows 11 (min. res. 1024 x 768)
Ambient operating temperature range 0 °C to 55 °C (32 °F to 131 °F)
Size 240 x 47 x 156 / 9.44 x 1.85 x 6.14
Weight 2.04 kg


AF M5.11 bit
Dimension A 240 mm
Dimension B 156 mm
Dimension C 47 mm

Box Content


USB cable to connect Forza bit amplifiers to PC.

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Provided control interconnection to control memory selection and remote power-on.

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6 channels DSP output cable to connect Forza bit amplifier to Forza D amplifier.

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Provided cable with four pairs of labeled cables to connect the speakers to the AF M5.11 bit.

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Provided cable for AF M5.11 bit with two pairs of labeled cables to connect a single voice coil or dual voice coil subwoofer, or two subwoofers.

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Eight stereo RCAs interconnection to connect Forza bit amplifier with after-market sources with PRE-OUT outputs provided with Forza amplifiers.

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Provided cable with 8 pairs of labeled wires to connect Forza bit amplifiers bit with the high-level output of OEM sources.

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The DRC AC allows primary system control: Master volume, Subwoofer volume, Source selection, Memory selection, Final tuning eq.

The entire DRC AC setting can be fully programmed on bit Drive software!

- enable/disable functions and assign them an order

- choose LED colors for each function

- regulate the LED brightness

- enable/disable Sleep mode

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The C2O interface converts the signals coming from the coaxial digital input and from the analog AUX-IN into a TOSLINK optical digital output signal (up to 24 bit/192kHz). The conversion allows the integration of the new Hi-Res portable devices equipped with coaxial digital output (75 ohm) and smartphones with analog output on 3.5 mm mini Jack (also 4 poles) with Audison processors featuring an optical digital input compatible with the resolution of the signal sent to the C20. Thanks to its extreme compactness, the C20 can be installed in a hidden position on the dashboard, drastically reducing the length of the cabling between the portable player and the receiving device.
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bit DMI
bit DMI
bit DMI is a digital interface for MOST systems, providing the ability to connect the Audison bit processors and the Audison amplifiers, equipped with digital input, to OEM multimedia systems in cars featuring the MOST technology based on optical fibre. Thanks to the digital connection, the signal can be transmitted without loss of quality, keeping the audio controls built in the OEM head unit “ such as volume, balance and tone controls as well as the hands-free kit, navigation system and parking sensors alerts unaltered.
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The F2O accessory is a digital input extension board, compatible with the new line of Audison AF bit amplifiers with integrated Dsp.

The card fits the dedicated external slot of the AF bit amplifier and it adds either an additional Coaxial S/PDIF or a second Toslink S/PDIF input. The type of additional input can be selected by the switch mounted over the card itself.

In case the Coaxial S/PDIF input is selected, it is possible to use the Coaxial input cable included in the board box.

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The F4IN accessory is an analog input extension board, compatible with the new line of Audison AF bit amplifiers with integrated Dsp.

The card fits the dedicated external slot of the AF bit amplifier and adds four analog high-voltage input channels to the AF bit native eight, thus reaching a total of twelve high-level (SPK IN) inputs.

With respect to the sensitivity range of the AF bit native eight SPK IN inputs (2.2 ÷ 22 VRMS), the F4IN features 3.2 ÷ 32 VRMS to allow a perfect integration in advanced OEM systems with higher voltages.

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The Audison AF Link is an accessory cable to connect the DSP OUT outputs of the Audison AF bit amplifiers (amplifiers with integrated DSP) to the PRE IN inputs of the Audison AF D amplifiers.

Look at all the connection examples in the Owner’s manual !

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This Plug&Play T-Harness allows to install an Audison AF bit amplifier on BMW vehicles equipped with RAM modules. It is compatible with "Standard" and "HI-FI" 676 sound systems (It is also compatible with 688 HK-branded systems, but only delivers 7 of the 9 channels required).
This harness delivers the 7 speaker-level outputs of the RAM to the inputs of your AF amplifier and also provides speaker leads for front, rear, underseat woofer, and center - so you can configure your AF amplifier as desired. NOTE: not compatible with AP BMW ASD BYPASS – Active Sound “artificial exhaust note” defeat requires vehicle coding.
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  • Improved audio performance and power thanks to the latest generation of ADT (Audison D-Class) technology
  • Unbeatable power/volume ratio up to 0.68 W RMS/cm³ reaching 82% of efficiency
  • Next-generation bit Drive software platform
  • Hi-Res compatibility performance, with an extended audio band up to 40 kHz, made possible by and DSP working operation at 24 bit/96 kHz
  • Maximum versatility thanks to the possibility of using the bridging option for each pair of power outputs
  • Up to 11 output channels (5 amplified, 6 optional pre-outs) controlled by the DSP to expand the system with other amplifiers
  • 8 high/low-level inputs (and an optical Toslink digital input) support total connectivity even with the most complex OEM systems
  • Extension card slot (additional 4 analog or 1 digital inputs)
  • Electrical signal analysis for each input channel ensures proper integration and correction
  • Acoustic analysis (with your USB microphone) integrates the response graph into the equalizer display. This ensures efficient tuning and great sound!
  • Advanced signal routing options allow the technician to go beyond the predefined system definitions in the Configuration Wizard



Next-generation bit Drive software platform – developed for this family of products – simplifies every control and function.


Native DSP working at 24 bit/96 kHz and an extended audio band up to 40 kHz.


The acoustic analysis integrates the response graph into the equalizer display ensuring efficient tuning and great sound, compatible with any 24-bit USB microphone.


The electrical analysis integrates the response graph into the input equalizer display, ensuring efficient tuning.


Electrical Signal Analysis ensures proper integration and correction for each input channel.


Enjoy the improved audio performance of the latest generation Audison D-Class technology.


The “All Channels Driven” design philosophy guarantees that the Audison amplifier delivers the rated power on all channels simultaneously. To reach that target, Audison designed the amplifier power supply to handle the cumulative power demand.


Maximum versatility thanks to the bridging option for each pair of channels.


Forza amplifiers have two independent power supplies: the audio amplifier power supply is loosely regulated, which allows superior dynamic performance. The DSP power supply is stiffly regulated, which maintains DSP microprocessor operation even during lower-voltage transient states (i.e., start/stop operation).


Quick I/O Configuration speeds up system definition and signal routing.


When connected with Audison B-CON hi-res Bluetooth receiver, this feature manages the Master Volume of the Forza amp thus ensuring full dynamic range signal at the input.


iDatalink Maestro AR native support for a total integration with OEM infotainment.


Equipped with eight analog inputs, to support total connectivity even with the most complex OEM systems.


Automatically sums and reverses OEM equalization.


Input delay compensation of time-delayed factory outputs prior to signal summing.


Allows left and right inputs to match in phase before tuning, even if OEM phase processing has been used.


Universal Speaker Simulator technology on high-level inputs for maximum compatibility with any type of Head-Unit OEM Source.


11 DSP-processed output channels for total control.


6 native pre-out channels for maximum versatility.

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Discover the New Features of

bit Drive 2.0

An Essential Upgrade for Both Tuning Professionals and Audiophile Enthusiasts


Splash Screen of the bit Drive Software Updated to Upgrade 2.0

Audison is pleased to announce the launch of the 2.0 update for our renowned bit Drive software, now available for free download. This upgrade marks a significant advancement for enthusiasts and professionals in the car audio field, offering advanced tools for impeccable and personalized sound tuning. With bit Drive 2.0, every user has the opportunity to elevate their vehicle’s audio experience at no additional cost, leveraging our innovative integrated features.

New Features of bit Drive 2.0



Auto Level Alignment

ACCORDO Auto Level Alignment sets the levels of the output channels in order to satisfy a desired amplitude response specified by the user, ensuring optimal tonal balance suited to personal preference.

Auto Time Alignment

ACCORDO Auto Time Alignment sets the delays of the output channels in order to align the times of arrival of each speaker at the measurement position, ensuring optimal sound staging.

Auto EQ

ACCORDO Auto EQ sets the equalizer of the output channels in order to improve the response of each speaker by correcting the unfavorable effects of the cabin’s acoustics, ensuring a perceptually-even frequency response both in amplitude and phase.

UPMIXER: Expanding the Sound Stage

An upmixer delivers multichannel sound from two channels of stereo input. Upmixers help overcome many limitations of the automotive environment – they deliver symmetrical stereo presentations for multiple listening locations, and they increase the apparent size of the vehicle cabin.

This internal Upmixer is very flexible and can be configured to enable a variety of systems. The front left, right, and center channel outputs of the Upmixer deliver the stereo presentation. The rear surround channels increase the apparent size of the cabin by enhancing ambiance.

Possible Upmixed System Configurations:

  • Front Stereo, Center-channel, and Sub (3.1)
  • Front Stereo, Rear Surround, and Sub (4.1)
  • Front Stereo, Center-channel, Rear Stereo, and Sub (3.1 + stereo rear)
  • Stereo, Center, Rear Surround, and Sub (5.1)
  • Stereo Front, Stereo Rear, Rear Surround, and Sub (6.1)
  • Stereo Front, Stereo Rear, Center, Rear Surround, and Sub (7.1)

The Upmixer can also be used without a subwoofer if desired.

Any of the five upmixed channels can be routed to any desired output channels. Once processed, they can be divided into band-limited, driver-specific channels using crossover filters. The Front Stereo can be full-range, active 2-way, or active 3-way, for example. The Center can be full range or active 2-way. Even the Rear Surround could be configured in this way, although this would be rare in practical application.

Temporal Delay Management Window Integrated in the Main GUI

An intuitive interface in the main GUI allows for precise delay adjustments without the need to navigate through multiple windows. Direct access via keyboard or incremental control makes setup quick and efficient, ideal for technicians and enthusiasts who desire tailor-made configurations.

Target Curve Management

With import and export options, users can easily save and share their audio configurations. The 11-band parametric EQ offers further customization possibilities, tailoring the sound to the specific needs of each listener.

Preferred Memories

Further personalize your listening experience with preferred memories for different audio sources, automatically switching when moving between sources.

Turn On Setup

Added Turn On Setup feature: in the Default volatile data window it is now possible to choose volume/source/memory settings for each turn-on of the device

Improved Inputs and Outputs

Improvement of the proposed inputs and outputs configurations on the Configuration Wizard

Help files

Updated Help files


The introduction of keyboard shortcuts allows quick access to many software functions, optimizing time and enhancing efficiency during use.

Free Download

The upgrade to version 2.0 of the bit Drive software is completely free and already available to all users. We invite everyone to download this update to experience the new features and improve the audio experience in their vehicle. Visit our website for the download and for more information on how to maximize the potential of your audio system with bit Drive 2.0.

bit Drive v2.0 Release notes:

Accordo is an advanced cabin-correction algorithm developed by Audison R&D team that acoustically tunes a car-audio system to a selected target, with time and phase alignment, in just a few minutes.

The Accordo wizard procedure performs output EQ, level and time delay adjustments (or just one of them if you wish) by using any external microphone or soundcard.

  • Choose your microphone, connect it to the laptop and place it on the desired listening position.
  • Select you target curve among the default ones available in bitDrive, or create easily your own target curve depending on your preferences.

Accordo will do the rest in a few seconds, and your system will be ready to sound !

The Upmixer feature is a bitDrive own algorithm developed to get a wider spatial image for both driver and passenger seats. That improves considerably the listening experience and the stereo panorama for all listeners!

  • The algorithm allows to reproduce only the monophonic music contents on the center speaker, which means only the contents available at the same time on both left front and right front channels.
  • Instead, the stereophonic music contents (played only by either left or right channels) are only kept on the left or right channels accordingly, without affecting the center speaker.
  • 3 Upmixer modes (Wide, Default, Narrow) are available depending on the preferences for the stage width.

The Output time delay settings have been moved on the bitDrive main UI to improve the easy of configuration and fine set operations

  • Choose Distance mode and add the speaker distances on the text boxes. bit Drive will automatically calculate in real time the time delay values (they will be visible and editable in Delay mode)
  • Choose Delay mode If you prefer to enter directly the time delay values
  • Use the Up/Down arrows to fine set the delays/distances by ± 01ms or ± 1cm
  • Press the link button and select the checkboxes to link group of speakers and set group delays

The selection of target curves for tuning your system with a microphone has now a set o powerful and user-friendly tools available:

  • Added an eleven parametric/graphic band EQ to modify and create your own curve
  • Added selection among one of the six preloaded curves available with bitDrive
  • Added options to Import and export target curve files on your laptop

The new REW Import Function allows to import EQ Filter settings from REW, a popular software used fo advanced acoustic measurements and data processing.

The feature is now available in bit Drive for each Output channel EQ and for the Final Tuning EQ.

In REW you can decide Target Levels, Frequency Range where you want to be Match to your Target Curve, Maximum Boost and several other options to customize the EQ filters calculation.

Then make your acoustic measurements with REW, select Audison among the options to let REW calculating the EQ filter settings that are compatible with Audison products and you will be able to import them in bit Drive with a click.

It is now possible to select a preferential memory for any Source enabled in bitDrive.

Every time a source change is forced either by DRC AC, DRC MP CAN, B-CON streaming, B-CON go app or triggers, the device will automatically switch the selected preferential memory.

Speed up your tuning operations with the use of keyboard to set EQ, delays, levels, memory/source selections, and many other commands.

The keyboard layout are compatible with QWERTY, QWERTZ and AZERTY keyboards.

bitDrive 2.0 is compatible also with the AF M1.7 bit, the brand new AF amplifier which is not just a mono amp, but a real dsp amplifier equipped with additional 6 pre-outs and all the bitDrive software capabilities for tuning your entire system. bitDrive 2.0 adds in this product some cool features to improve your Sub response:

  • Superbass: increase the perceived frequency response at very low frequencies even for smaller subwoofers;
  • Fixed Bass Boost: add a fixed boost up to +6dB at the desired frequency;
  • Dynamic Bass Boost: add variable boost up to +6dB that changes according to the input signal level.

Both Fixed and Dynamic Bass Boost can be enabled for each of the six available memories in bitDrive.

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