Alpine R-A90S
R Series 750 Watt 6-channel car amplifier
Alpine R-A90S R-Series 6-Channel Staggered Power Amplifier
The Alpine R-A90S is a versatile 6-channel amplifier from Alpine's R-Series, designed to deliver high-resolution audio with a unique staggered power configuration. This amplifier provides flexibility for various system setups, including 3-way active systems and powerful subwoofer configurations, ensuring precise and dynamic sound reproduction.
Key Features
| Feature | Details |
|---|---|
| Power Output |
|
| Amplifier Class | Class D with Dual "Sierra" Post-Filter Feedback Loops |
| High-Resolution Audio | Compliant up to 45kHz frequency response |
| Crossover Controls |
|
| Input Options | Speaker-level and preamp inputs with GTO™ (Great Turn-On) signal-sensing |
| Remote Control | Compatible with Alpine RUX-KNOB.2 for subwoofer level control (sold separately) |
| Design | Compact chassis with one-sided terminal layout for easy installation |
What’s in the Box
| Alpine R-A90S 6-Channel Amplifier |
| Three 30-amp ATO fuses (installed) |
| 4 Mounting feet |
| Four 3/4" Screws |
| Eight M2.5x5.5mm Machine screws |
| 2mm Allen wrench |
| 3mm Allen wrench |
| Owner's Manual |
| Alpine Verification Certificate |
| Warranty Information |
| Power Supply Note |
| Online Product Registration Information |
Technical Specifications
| Spec | Value |
|---|---|
| RMS Power Output |
|
| Frequency Response | 10Hz – 45kHz (±3dB) |
| Signal-to-Noise Ratio | >85dB (ref. 1W into 4Ω) |
| Total Harmonic Distortion | ≤0.03% (ref. 10W into 4Ω) |
| Damping Factor | >500 |
| Input Sensitivity | 0.2V – 4V |
| Minimum Impedance | 2Ω (unbridged), 4Ω (bridged) |
| Fuse Rating | 30A x 3 (external fuses required) |
| Dimensions (W×H×D) | 12.75" × 2" × 10.75" |
| Weight | Approximately 7 lbs |
| Warranty | 1 Year |
FAQ
Do products purchased from San Diego Car Stereo come with a warranty?
Yes, all products come with a 1-year manufacturer warranty unless otherwise stated. This covers any defects excluding physical damage.
Are these products brand new?
Yes, every product we sell is 100% brand new, unused, and comes in original manufacturer packaging unless clearly marked otherwise.
Do you offer installation services?
Yes, we offer professional installation services at both of our San Diego Car Stereo locations. Our expert technicians have over 50 years of combined experience to install all of your car, marine, or offroad audio needs. Stop by or give us a call to schedule an appointment to get a quote in person.