DSP Amps
Subwoofer Box
Home | DSP Amps | Prima | AP4.9 bit

AP4.9 bit DSP Amplifier | 520 W | 9 CH DSP + 4 x 130 W @ 2 ohm | D-class Fully Bridgeable

AP4.9 bit amplifier is ideal to realize a powerful two-way front full active. The built-in processor provides the ability to assign the pre-outs to the AP1 D amplifier, creating a very powerful system in a small space thanks to the rack mounting system.

Amplifier Tech Data

Channels 4
Class D-Class
Power supply voltage / fuse 7.5 ÷ 15 VDC
Idling current 1.32 A
Standby Current Draw 2 mA
Consumption @ 14.4 VDC, 2Ω, Max Musical Power 30 A
Remote IN 7 ÷ 15 VDC
Remote OUT 11 ÷ 15 VDC
ART - Automatic Remote Turn on/ off from OUTPUT BTL speakers Speakers to input - selectable
AST - Automatic Signal Turn on/off (Selectable) Pre-In to input - selectable
CPL - Continuous Power Limiting Max continuous power - selectable

Amplifier Stage

Distortion - THD @ 1 kHz, 4Ω, 70% Rated Power 0.10 %
Bandwidth @ -1.5 dB 10 ÷ 20k Hz
Damping factor @ 1 kHz, 4Ω, 2 VRMS >170
S/N ratio (A weighted @ 1 V Input) Master Input 95 dBA
Total Power RMS 520 W
Minimum load impedance 4 Ch: 1-2-3-4 2Ω | 2 Ch: Bridge (1-2) (3-4) 4Ω
Output Continuous Power (RMS) @14.4 VDC, 1% THD 4 Ch @ 4Ω: 70 W x 4

4 Ch @ 2Ω: 130 W x 4

2 Ch - (Bridge 1/2; 3/4) @ 4 W 260 W x 2
Adjustable Crossover Yes

CEA Specifications

Output power @ 4Ω, 1% THD+N, 14.4 V 70 W x 4
SN ratio (ref. 1W output) 75 dBA

Inputs / Outputs

Pre Outputs 5
Hi Level Inputs 6
Low Level Inputs 6
Input Optical IN 96 kHz/24 bit max (Selectable: DRC/wire)

Digital Signal Processor

Filter type Full / Hi Pass / Lo Pass / Band Pass
Filter mode and slope Linkwitz @ 12/24 dB - Butterworth @ 6/12/18/24 dB
Crossover frequency 68 steps @ 20 ÷ 20k Hz
Phase control 0° / 180°
Analog Input Equalizer (20 ÷ 20k Hz) Automatic De-Equalization
Output Equalizer N.9 Parametrics Equalizers: ±12 dB; 10 pole; 20 ÷ 20k Hz
Time Alignment Distance 0 ÷ 510 cm / 0 ÷ 200.8 in.
Time Alignment Delay 0 ÷ 15 ms
Time Alignment Step 0,08 ms; 2,8 cm / 1.1 in.
Time Alignment Fine SET 0,02 ms; 0,7 cm / 0.27 in.
Preset (Drive Preset) Rotary switch for 7 installation Presets

Control Connections

From / To Personal Computer 1 x micro USB-B
ASP For module: Automatic Speaker Presence
Optical / AUX select 12V control for Optical In / AUX enable
Master enable 12V control for Master In enable

General Requirements

PC connections Micro USB (1.1 / 2.0 / 3.0)
Software/PC requirements Microsoft Windows (32/64 bit): XP, Vista, Windows 7, Windows 8
Video Resolution with screen resize 800 x 600
Ambient operating temperature range 0 °C to 55 °C (32°F to 131°F)
Size 198 x45,50 x 134 /7.8 x1.8 x5.27
Weight 1.35 kg


AP4.9 bit
Dimension A 198 mm
Dimension B 178 mm
Dimension C 134 mm
Dimension D 114 mm
Dimension E 45.5 mm

Box Content


USB cable to connect Forza bit amplifiers to PC.

Read more

Provided cable with eight pairs of labeled cables to connect the speakers to the AF M8.14 bit and AF C8.14 bit.

Read more

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

Read more


bit Tune
bit Tune
The Audison bit Tune is a revolutionary system of automatic calibration for Audison bit processors developed with bit Drive technology. Bit Tune also includes a multitude of additional features for electro-acoustic verification and analysis of any car audio system.The Audison team s goal in developing the bit Tune was to speed up the setting of basic parameters for the calibration of the bit processors (time alignment, equalization, levels, etc.), ensuring an excellent level of acoustic performance. This phase also includes the diagnosis of comm on errors (channel inversion/phase, no signal on one channel/cable, etc.) to set the specialist free from his routine work and allow him to focus on the art of fine-tuning. Only personal interpretation and experience can achieve what a machine could never do: create Your Sound!
Read more


  • 9 channels built-in DSP
  • 4 x 130 W @ 2 ohm
  • Ability to assign the pre-outs to the AP1 D mono-amplifier to drive a subwoofer


bit Tune
Full DA - Full Digital Audio

Pure digital signal transfer with a resolution up to 24 bit / 48 kHz.

bit Tune

Auto tuning by Audison bit Tune.

bit Tune
DE-EQ - De Equalization

De-equalization function to “flatten” any equalization applied by default by OEM sources.

bit Tune
DCC - Direct Current Cockpit

To speed-up installation time preserving safety and reliability, the Audison R&D team equipped the AP bit amplifiers with DCC, an innovative management circuit which monitors the power supply current consumption in real-time. This solution provides the ability to connect the amplifier to the cockpit directly without reaching the battery.

bit Tune
iDatalink Maestro AR compatibility

When AP bit amplifiers are installed into a compatible vehicle using the iDatalink Maestro AR (sold separately), the user can enjoy a perfect integration with factory installed navigation, advanced safety systems, voice-controlled hands-free and infotainment. (Only for North America)

bit Tune

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

Register Product

Register your product now to add 1 additional year of warranty coverage.

iDatalink Maestro AR

AP bit all models

AP bit all models update v. for ADS iDataLink MAESTRO AR interface

Subscribe to Audison