The Alpine R2-A75M is a Class D monoblock car amplifier from the R-Series. It delivers 750W RMS at 2 ohms and 500W RMS at 4 ohms. Its all-digital "no shutdown" circuit design is built to hold performance at high power output.
The body is solid cast aluminum with precision machined finishes and high quality terminal blocks. The chassis is compact, and R-Series amplifiers are 15% smaller than their predecessors. The controls sit on the top panel under a cover panel. A single-sided terminal layout and integrated chassis mounting are designed to simplify installation.
It accepts RCA and speaker level inputs and can be bridged. Built-in tools include a bandpass filter, a variable low pass filter, a subsonic filter and a bass EQ. Thermal protection is included. It is ready for the optional RUX-KNOB.2 remote bass knob.
- Type
- Class D monoblock car amplifier
- Channels
- Mono
- Power at 4 ohms
- 500W x 1 (14.4V, 1% THD)
- Power at 2 ohms
- 750W x 1 (14.4V, 1% THD)
- THD+N
- 10W into 4Ω: ≤0.04%; 10W into 2Ω: ≤0.06%; rated power into 4Ω or 2Ω: ≤1.0%
- S/N ratio
- 1W into 4Ω: >75 dB; rated power into 4Ω: >102 dB (IHF A-wtd, AES-17)
- Frequency response
- 10Hz–400Hz (0 +/-3dB) and 15Hz–325Hz (0 +/-1dB), 1W into 4Ω
- Damping factor
- >250 (10W into 4Ω at 100Hz)
- Input sensitivity
- RCA input, rated power into 4Ω: Hi 0.4–10V; Lo 0.1–4.0V
- Low pass filter
- Variable, 50Hz–400Hz (-24dB/oct.)
- Subsonic filter
- Variable, 8Hz–40Hz (-24dB/oct.)
- Bass EQ
- 0 to +12dB, variable (fc=50Hz)
- Remote level
- Linear attenuation, 0 to -20dB (requires optional RUX-KNOB.2)
- Inputs
- RCA and speaker level
- Protection
- Thermal protection (zero shut-off)
- Construction
- Solid cast aluminum body