Name: Alpine R-A90S
Brand: Alpine
SKU: ra90s
Price: 699.95 USD
Availability: OutOfStock
Rating: 5.0000 (1 reviews)

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Product highlights

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

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R-A90S

6 Channel Amplifier with 5 Channel Power

The R-A90S has a unique staggered power channel layout that has double the power on the last two channels. When looking to power a dual subwoofer configuration, the R-A90S’s 5th and 6th channels can be bridged to provide up to 500-watts at 4 ohm. The R-A90S is matched in power and performance for the Dual 10-inch Alpine Halo S-Series Preloaded Subwoofer Enclosures with ProLink.

An Amplifier That Grows with You

Thanks to the unique staggered power channel layout, the R-A90S can host different levels of power on each channel, compared to traditional, multi-channel amplifiers. This allows the R-A90S to grow with you as it can effectively function as both a 3-way active amplifier and a 5-channel amplifier by delivering the power you need to the channels where you need it the most.

Product Details:

R-Series Class D 2 ohm Stable 6-Channel Amplifier
RMS Power Rating:

4 ohm: 75 watts x 4 channel + 150 watts x 2 channel
2 ohm: 100 watts x 4 channel + 250 watts x 2 channel
Bridged: 200 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 4 ohm

Total power output: 900 watts
Compatible for amplifying a 3-way active system
Wired bass level remote control with optional Alpine RUX-KNOB.2
Speaker-level (high-level) inputs (Requires adapter like the Kicker KISL)
Hi-resolution audio compliant (40kHz)
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:
Variable low-pass/band-pass filter: 50 - 400 Hz
Fuse Rating: 90A
4 AWG gauge amplifier wiring kit is recommended for installation
Dimensions: 12.75" L x 10.75" W x 2" H
Authorized Internet Dealer
1-year Manufacturer's 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

Number of Channels

6-Channel

Total RMS Power Output

900 watts

Maximum Input Gauge Size

4 AWG

Minimum Impedance Unbridged

2 ohm

Minimum Impedance Bridged

4 ohms

Frequency Response

10 - 45000 Hz

THD at Rated RMS Power

Speaker Level Inputs

Optional (Requires Accessory Adapter)

Preamp Outputs

Built-in Crossover

Low-Pass (LP)

Low-Pass Crossover Frequency

50 - 400 Hz

Signal-to-Noise Ratio

85 dB

Remote bass/level controller

Optional (Accessory required and sold separately)

Alpine RUX-KNOB.2

Fuse Rating

30A x 3

Total Fuse Rating

Strappable

Amp Bluetooth Connectivity

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

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

Manufacturer

Customer Ratings & Reviews

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By feature average rating

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

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Alpine R-A90S

$699.95

Description

R-A90S

6 Channel Amplifier with 5 Channel Power

An Amplifier That Grows with You

Product Details:

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Item Details

Customer Ratings & Reviews

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