Audison Forza AF C4D 4-Channel Amplifier

Amplifier | 600 W total power | 4 x 150 W @ 2ohm | 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 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.

Audison D-Class Technology:
ADT uses a switching frequency twice as fast as many other modern Class D amplifiers using very high-tolerance component parts to keep the timing correct even during temperature extremes. The higher switching frequency of Audison Class D moves noise much farther away from the audible band. Audison Class D amplifiers also use a steeper 4th-order analog lowpass filter, rather than the simpler 2nd-order lowpass filters usually used in competing designs. The steeper filter will keep noise much lower in amplitude – which is good for controlling EMI and preventing infrasonic noise from getting to the tweeters. It also keeps phase shift outside the audible range. The cost is higher – twice as many components are needed for a 4th-order filter compared to the usual 2nd-order filter, and each output channel needs its own filter – but Audison determined through exhaustive listening testing that this design was the best-sounding approach.

All Channels Driven:
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.

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

Hi-Res Audio:
According to the definition of Hi-Res audio provided by JAS (Japan Audio Society), this amplifier exceeds the above 40 kHz bandwith analog requirement.

• 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

• Channels: 4
• Class: D-Class
• Efficiency: 84%
• 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: 0.004 A
• Idling Current When Off: 0.6 mA
• Consumption @ 14.4 VDC, 2Ω, Max Musical Power: 25 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: 0.03%
• Bandwidth A (-3 dB, 2 VRMS, 4Ω): 10 Hz ÷ 40 kHz
• S/N Ratio A (A weighted @ 1 V): 102 dB
• Damping Factor A (1 kHz, 4Ω, 2 VRMS): 95
• Input Sensitivity Pre-In: 0.6 ÷ 6 VRMS
• Input Sensitivity Speaker-In: 2.2 ÷ 22 VRMS
• Total Power RMS: 600 W
• Minimum Load Impedance: 2Ω
• 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
• Adjustable Crossover: No
• CEA Specifications Output Power @ 4Ω, 1% THD+N, 14.4 V: 90 W x 4
• S/N Ratio (ref. 1W output): 81 dBA
• Input Type: Pre-In / Speaker-In
• Remote Sub Volume: ±12 dB
• Fuse: 1 x 30 A
• Weight: 1.49 kg

• REMOTE IN-OUT AF D AMPLIFIERS: Remote in-out cable for AF D amplifiers to manage Power-on, Energy Save mode and remote out functions.
• SPK OUT 4CH: Provided cable with four pairs of labeled cables to connect the speakers to the AF M5.11 bit.
• PRE IN CABLE 2 CH: Provided in pair. Two stereo RCAs interconnection to connect Forza bit amplifier with after-market sources with PRE-OUT outputs provided with Forza amplifiers.
• SPEAKER IN CABLE 4 CH: Provided cable with 4 pairs of labeled wires to connect Forza bit amplifiers bit with the high-level output of OEM sources.
• FORZA INSTALL KIT: