The AP4 D amplifier was designed as an extension for the AP 4.9 bit and AP 5.9 bit amplifiers, offering 4 additional 70 W amplified channels.
AMPLIFIER TECH DATA
| Channels | 4 |
| Class | D-Class |
| Hi Level Input | Yes |
| Low Level Input | Yes |
| Digital Input | No |
| Power supply voltage / fuse | 7.5 ÷ 15 VDC |
| Idling current | 1 A |
| Idling current when off | 0.05 mA |
| Consumption @ 14.4 VDC, 2Ω, Max Musical Power | 27 A |
| Remote IN | 7 ÷ 15 VDC (1 mA) |
AMPLIFIER STAGE
| Distortion – THD @ 100 Hz, 4Ω, 70% Rated Power | 0.1% |
| Bandwidth A | (-3 dB, 2 VRMS, 4 Ω): 10 ÷ 30k Hz |
| S/N ratio A | (A weighted @ 1 V): 100 dBA |
| Damping factor A | (1 kHz, 2 VRMS, 4 Ω): 170 |
| Input sensitivity Pre-In | Selectable: 1,5 – 3 – 4,5 V RMS |
| Pre In Impedance | 15k Ω |
| Input sensitivity Speaker-In | Selectable: 3 – 6 – 9 V RMS |
| Input impedance Speaker-In | Wired |
| Total Power RMS | 520 W |
| Minimum load impedance | • 4 Ch: 1-2-3-4 2Ω • 2 Ch: Bridge (1-2) (3-4) 4Ω |
| Output Power (RMS) @12.0 ÷ 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 |
| Output Power (RMS) @14.4 VDC, 10% THD | • 4 Ch @ 4Ω: 90 W x 4 • 4 Ch @ 2Ω: 180 W x 4 • 2 Ch – (Bridge 1/2; 3/4) @ 4 W 360 W x 2 |
| Adjustable Crossover | No |
CEA SPECIFICATIONS
| Output power @ 4Ω, 1% THD+N, 14.4 V | 70 W x 4 |
| SN ratio (ref. 1W output) | 85 dBA |
INPUTS
| Input Type | PRE IN RCA |
| Filter Pass A | MUTE (Energy Saving Control) wired from AP4.9 bit / AP5.9 bit |
| Filter Pass B | Ambient operating temperature range: 0 °C to 55 °C (32°F to 131°F) |
OTHER
| Fuse | 30 A |
| Weight | 1.33 kg |
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