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Alpine R-A90S

1500W RMS R-Series Class-D 6-Channel Amplifier

Alpine
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• 75 watts x 4 channel + 150 watts x 2 channel @ 4 ohms
• 100 watts x 4 channel + 250 watts x 2 channel @ 2 ohms
• Bridged: 200 watts x 2 channel @ 4 ohms + 500 watts x 1 channel @ 4 ohms
• Total RMS Power: 900 watts
• Class D 2 ohms Stable 6-Channel-Channel Amplifier

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Alpine R-A90S with NVX XDSP66BT

R Series 6/5/4/3 Channel Power Amplifier with 15 Band Parametric EQ Digital Signal Processor

(2)

$674.94

Description


Alpine brand icon

Authorized dealer

Product Details:

  • R-Series Class D 2 ohms Stable 6-Channel Amplifier
  • RMS Power Rating:
    • 4 ohms: 75 watts x 4 channel + 150 watts x 2 channel
    • 2 ohms: 100 watts x 4 channel + 250 watts x 2 channel
    • Bridged: 200 watts x 2 channel @ 4 ohms + 500 watts x 1 channel @ 4 ohms
  • Total power output: 900 watts
  • LED Power/Protect Light
  • Wired bass level remote control with optional Alpine RUX-KNOB.2
  • Speaker-level (high-level) inputs (Requires adapter like the Kicker KISL)
  • Signal sensing remote turn-on
  • Input sensitivity:
    • Low level: 0.2 - 4.0 volts
    • High level: 0.5 - 10 volts
  • Frequency Response: 10 - 45000 Hz
  • Total Harmonic Distortion (THD): 1%
  • Signal to Noise Ratio: 85 dB
  • Variable high-pass/band-pass filter: 50 - 6000 Hz
  • Variable low-pass/band-pass filter: 50 - 400 Hz
  • Fuse Rating: 90A
  • 4 AWG gauge amplifier wiring kit is recommended for installation
  • Dimensions: 14" L x 10-3/4" W x 2-1/16" H
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty
  • MFR #: R-A90S

Specifications & Details


Key Features
Amplifier Key Features
Hi-Res Audio Certified
Speaker Level Inputs
Power Specifications - Full Range Channels
RMS Power @ 4 ohms
75 watts x 4 channel
RMS Power @ 2 ohms
100 watts x 4 channel
Bridged RMS Power
200 watts x 2 channel
Power Specifications - Subwoofer Channel
RMS Power @ 4 ohms
150 watts x 2 channel
RMS Power @ 2 ohms
250 watts x 2 channel
Amplifier Specifications
Series
R-Series
Amplifier Class
D
Number of Channels
6-Channel
Total RMS Power Output
900 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
Frequency Response
10 - 45000 Hz
THD at Rated RMS Power
1%
Speaker Level Inputs
Yes
Built-in Crossover
Band-Pass (BP)
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
50 - 6000 Hz
Low-Pass Crossover Frequency
50 - 400 Hz
Signal-to-Noise Ratio
85 dB
Remote bass/level controller
Optional (Accessory required and sold separately)
Fuse Rating
30A x 3 
Total Fuse Rating
90
Sonic Certified Amplifier
Not Tested
Hi-Res Certified
Yes
Low-Level Input Sensitivity
0.2 - 4.0 volts
High-Level Input Sensitivity
0.5 - 10 volts
What is in the box?
Paperwork
User manual
Warranty/Registration card
Serial number card
Power certification
WITB: Amplifiers
Amplifier
Mounting Brackets
Mounting screws (4)
Three spare fuses
Allen wrenches (2)
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details


Manufacturer:

Model Number:

R-A90S

Weight:

5.00lbs

Internal SKU:

ra90s

Internal Product ID:

178225

Customer Ratings & Reviews



5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Reviews

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A Crazy Versatile Amp with surprising Power

Ill start with explaining why I went with this Amp. I have a 1998 Volvo S70 T5 with every option and that includes the Dolby Surround System. That system was designed as 8 Ohm. So I made the decision that I would be completely rewiring the car and removing the factory Amp. The car has a Center Speaker, 2 6.5's with dash tweeters, 2 rear door speakers that are also 6.5's and 2 8" speakers on the deck. The car is loaded with speaker locations and that left me with the need to find an Amp that can power all of this. Enter the R-A90S, With the staggered power on channels 5&6 it was the perfect opportunity to install Alpine 6x9's on the deck to replace the OEM 8" speakers. The only exception is I am running the center channel off the deck itself. Regardless this amp does a great job of giving adequate power to all the speakers. Also this Amp is putting out a health amount of power above what was advertised. Even the included Birth sheet shows their test results on the amp you receive. My amp was putting out almost 15% more power than the guaranteed values.

Bottom line is that if you are looking for an amp to power a non standard setup this Amp allows you to get creative with your install. Its fantastic! 10/10

By Matthew on May 9, 2023 Checkmark Icon Verified purchase

32

found this helpful.

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