Alpine R2-A75M R Series Monoblock Class D Subwoofer Amplifier – 750W
Power your subwoofer with the Alpine R2-A75M R Series monoblock Class D amplifier. Designed specifically for high-performance bass systems, this dedicated mono amplifier delivers up to 750 watts RMS while combining efficient Class D technology with the control needed to get the most from your subwoofer.
The R2-A75M delivers 500 watts RMS at 4 ohms and 750 watts RMS at 2 ohms, making it a versatile match for a wide range of single-subwoofer systems. Its dedicated monoblock design directs all of the amplifier's power toward low-frequency performance.
Built-in crossover and bass controls allow you to fine-tune the amplifier to your enclosure and subwoofer. The variable low-pass filter helps keep unwanted higher frequencies out of the subwoofer signal, while the bass EQ provides additional low-frequency adjustment when desired.
The R2-A75M also supports both RCA and speaker-level inputs, giving you greater flexibility when integrating it into factory or aftermarket audio systems. A selectable remote turn-on mode further simplifies installation with different types of head units.
With its combination of R Series performance, efficient Class D operation, and dedicated subwoofer power, the R2-A75M is an excellent choice for listeners who want strong, controlled bass from a compact amplifier.
Key Features
- R Series monoblock Class D subwoofer amplifier
- 750W RMS maximum power output
- 500W RMS x 1 at 4 ohms
- 750W RMS x 1 at 2 ohms
- Dedicated single-channel subwoofer design
- Variable low-pass filter
- Variable bass EQ
- RCA and speaker-level inputs
- Selectable remote turn-on
- Optional remote bass control compatibility
- Designed for high-performance aftermarket subwoofer systems
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| Technical Specification |
Details |
| Model |
R2-A75M |
| Series |
R Series |
| Amplifier Class |
Class D |
| Amplifier Type |
Monoblock |
| Number of Channels |
1 |
| RMS Power @ 4 Ohms |
500W x 1 |
| RMS Power @ 2 Ohms |
750W x 1 |
| Frequency Response |
10Hz–400Hz |
| Low-Pass Filter |
Variable, 50Hz–400Hz |
| Low-Pass Filter Slope |
24dB/octave |
| Bass EQ |
Variable, 0 to +12dB @ 50Hz |
| Input Sensitivity |
0.2–4.0V (RCA Low) / 0.5–10V (RCA High) |
| Speaker-Level Input |
Yes |
| Signal-to-Noise Ratio |
>85dB |
| Damping Factor |
>750 |
| Remote Bass Control |
Compatible with optional RUX-KNOB.2 |
| Remote Turn-On |
Selectable |
| Power Requirement |
14.4V DC |
| Dimensions (W × H × D) |
10-1/4" × 2-1/4" × 8-1/4" |
| Weight |
6 lb 10 oz |