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AF M4D

Amplifier

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4 x 260 W @ 2 ohm

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D-class Fully Bridgeable

AF companion amplifiers are designed to add powerful amplifier channels to AF bit processor amplifiers. A plug-and-play signal input harness is included to make connection to AF bit amplifiers straightforward. AF companion amplifiers are also perfect for use with systems controlled and managed by a standalone bit processor, such as a bit One HD Virtuoso. AF companions have a “straight wire” architecture, without analog preamp functions such as crossover filtering, and are intended for use with external processors. AF M4D boasts four high-fidelity amplified channels 160W x 4 @4Ω*, 260W x 4 @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! The audio band is extended up to 40 kHz earning the coveted High-Resolution certification. Bridging channel pairs results in 520W x 2 @4Ω*, guaranteeing flexible and powerful performance.
*Output Continuous Power (RMS) @14.4 VDC, 1% THD, all channels driven.

Amplifier Tech Data

Channels 4
Class D-Class
Efficiency 83 %
Hi Level Input Yes
Low Level Input Yes
Digital Input No
Power supply voltage / fuse 11 ÷ 15 VDC
Operating power supply voltage 6.5 ÷ 17.5 VDC
Idling current 1.12 A
Idling current when off 0.007 mA
Consumption @ 14.4 VDC, 2Ω, Max Musical Power 47 A
Remote OUT 6.5 ÷15 VDC (150 mA)
Remote IN 4 ÷15 VDC (1 mA)
ART - Automatic Remote Turn on/off from OUTPUT BTL speakers (Selectable) 1.5 VDC

Amplifier Stage

Distortion - THD @ 100 Hz, 4Ω, 70% Rated Power 0.05%
Bandwidth A (-3 dB, 2 VRMS, 4 Ω): 10 Hz ÷ 42 kHz
S/N ratio A (A weighted @ 1 V): 103 dBA
Input sensitivity Pre-In 0.6 ÷ 6 VRMS
Input sensitivity Speaker-In 2.2 ÷ 22 VRMS
Total Power RMS 1040 W
Minimum load impedance 4 Ch 2Ω
2 Ch - (Bridge) 4Ω
Output Power (RMS) @12.0 ÷ 14.4 VDC, 1% THD 4Ch @ 4Ω: 160 W x 4

4Ch @ 2Ω: 260 W x 4

2Ch (Bridge 1/2; 3/4) @ 4Ω: 520 W x 2
Adjustable Crossover No

CEA Specifications

Output power @ 4Ω, 1% THD+N, 14.4 V 150 W x 4
SN ratio (ref. 1W output) 80 dB

Inputs

Input Type Pre-In / Speaker-In
Remote Sub Volume (-12 ÷ +12) dB

Other

Fuse 2 x 30A
Weight 2.04 kg

Dimensions

Dimension A 240 mm
Dimension B 156 mm
Dimension C 47 mm

Accessories

VCR-S2
VCR-S2
The optional VCR-S2 subwoofer volume control provides the ability to adapt the subwoofer level to any personal preference and favorite music genre. VCR S2 features a bulletproof Molex connector.
Read more
AF LINK CABLE
AF LINK CABLE

AF LINK accessory cable can be connected to have 6 additional channels configurable on the bit Drive software.

Read more

Features

  • 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 83% of efficiency
  • Hi-Res compatibility performance, with an extended audio band up to 40 kHz
  • Maximum versatility thanks to the possibility of using the bridging option for each pair of power outputs

Technologies

AF LINK CABLE

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

AF LINK CABLE

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

AF LINK CABLE

Extended audio band up to 40 kHz.

AF LINK CABLE

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

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