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 90W x 4 @4Ω*, 150W 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 300W x 2 @4Ω*, guaranteeing flexible and powerful performance. *Output Continuous Power (RMS) @14.4 VDC, 1% THD, all channels driven.
FEATURES
- Improved audio performance and power thanks to the latest generation of ADT (Audison D-Class) technology
- Unbeatable power/volume ratio up to 0.47 W RMS/cm³ reaching 81% 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
| AMPLIFIER STAGE | |
|---|---|
| Output Power (RMS) @14.4 VDC, 1% THD | 4Ch @ 4Ω: 90 W x 4,4Ch @ 2Ω: 150 W x 4,2Ch (bridge) @ 4Ω: 300 W x 2 |
| Minimum load impedance | 2Ω: |
| Total Power RMS | 600 W |
| Input sensitivity Speaker-In | 2.2 ÷ 22 VRMS |
| Input sensitivity Pre-In | 0.6 ÷ 6 VRMS |
| Damping factor A | (1 kHz, 4Ω, 2 VRMS): 95 |
| S/N ratio A | (A weighted @ 1 V): 102 dBA |
| Bandwidth A | (-3 dB, 2 VRMS, 4 Ω): 10Hz ÷ 40kHz |
| Distortion - THD @ 100 Hz, 4Ω, 70% Rated Power | 0,03% |
| AMPLIFIER TECH DATA | |
| ART - Automatic Remote Turn on/off from OUTPUT BTL speakers (Selectable) | 1.5 VDC |
| Remote IN | 4 ÷15 VDC (1 mA) |
| Remote OUT | 6.5 ÷15 VDC (150 mA) |
| Consumption @ 14.4 VDC, 2Ω, Max Musical Power | 25 A |
| Idling current when off | 0.6 mA |
| Idling current | 0.004 A |
| Operating power supply voltage | 6.5 ÷ 17.5 VDC |
| Power supply voltage / fuse | 11 ÷ 15 VDC |
| Digital Input | No |
| Low Level Input | Yes |
| Hi Level Input | Yes |
| Efficiency | 84% |
| Class | D-Class |
| Channels | 4 |
| AMPLIFIER STAGE | |
| Adjustable Crossover | No |
| CEA SPECIFICATIONS | |
| Output power @ 4Ω, 1% THD+N, 14.4 V | 90 W x 4 |
| SN ratio (ref. 1W output) | 81 dBA |
| INPUTS | |
| Input Type | Pre-In / Speaker-In |
| Remote Sub Volume | ±12 dB |
| OTHER | |
| Fuse | 1 x 30 A |
| Weight | 1.49 kg |
