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!

Specifications:
AMPLIFIER TECH DATA
Channels: 4
Class: D
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: 10 Hz ÷ 42 kHz
S/N ratio A: 103 dBA
Input sensitivity Pre-In: 0.6 ÷ 6 VRMS
Input sensitivity Speaker-In: 2.2 ÷ 22 VRMS
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

• Product Dimensions ‏ : ‎ 61.42 x 94.49 x 18.5 inches; 5 Pounds
• Date First Available ‏ : ‎ February 17, 2023
• Manufacturer ‏ : ‎ Audison