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Alpine  R-A90S

R-Series 100W x 4 RMS + 250W x 2 RMS @2Ohms 6/5/4/3 Channel Power Amplifier with Staggered Power

Item #56109

Condition:   Brand New

Product Highlights

  • 100W x 4 RMS @ 2 Ohms
  • 250W x 2 RMS @ 2 Ohms
  • 6/5/4/3 Channel
  • Staggered Power

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$599.95

Reg. Price $650.00  Save $50.05
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Alpine R-A90S R-Series 6/5/4/3 Channel Power Amplifier with Staggered Power

Alpine_iLX-407

We are an Alpine authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!

What's Inside?
  • • 6-Channel amplifier
  • • (3) 30-amp ATO fuses (installed)
  • • (4) Mounting feet
  • • (4) 3/4" Screws
  • • (8) M2.5x5.5mm Machine screws
  • • 2mm Allen wrench
  • • 3mm Allen wrench
  • • Owner's manual (English/ French/ Spanish)
  • • Alpine Verification Certificate
  • • Warranty information
Alpine_R-A90S
Built to Deliver High-quality Sound

The Alpine R-A90S amplifier is a powerhouse that brings your car audio system to life with its exceptional performance and versatility. Engineered with precision and built to deliver high-quality sound, this 6-channel amplifier is a game-changer for audio enthusiasts seeking optimal power and clarity.

Sleek Design

With its Class-D design and 900-watt maximum power output, the R-A90S ensures clean and efficient amplification, providing ample power to drive your speakers or subwoofers easily. Its compact size makes it easy to install in various locations, while its sleek design adds a touch of sophistication to your car's interior.

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Alpine_R-A90S
Has a Staggered Power Channel Layout

The R-A90S allows you to fine-tune your audio settings to achieve the perfect sound balance, featuring variable high-pass, low-pass, and subsonic filters and adjustable bass boost. It also has a staggered power channel layout, allowing you for a flexible sound system setup.

Features a Remote Bass Knob

Additionally, the R-A90S offers flexible connectivity options, including high-level and low-level inputs, allowing you to connect it to various head units or factory audio systems. It also features a remote bass knob for convenient control over your subwoofer levels on the go.

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  • Maximum Power : 900 Watts
  • Low Frequency Response : 50-400 Hz
  • High Frequency Response : 50-6000 Hz
  • Number of Channels : 6
  • Frequency Response : 10-45000 Hz
  • Built In Crossovers : Yes
  • RMS Power Output : 75x4 Watts
  • Amplifier Class : D
  • Fuse Rating : 90 A
  • XP750-SE OFFER : Yes

Features:

  • 6-channel car amplifier
  • 75 watts RMS x 4 + 150 watts RMS x 2 at 4 ohms
  • 100 watts RMS x 4 + 250 watts RMS x 2 at 2 ohms
  • 200 watts RMS x 2 bridged at 4 ohms + 500 watts RMS x 1 bridged at 4 ohms
  • Class D amp technology
  • Ch 1/2: selectable variable high-pass filter (50-400 Hz or 400-6000 Hz, 12 dB/octave)
  • Ch 3/4: variable high-pass or bandpass filter (50-400 Hz and 400-6000 Hz, 12 dB/octave)
  • Ch 5/6: variable low-pass filter (50-400 Hz, 12 dB/octave)
  • GTO™ (Great Turn On) signal-sensing turn-on with Ch1/2 speaker-level input
  • preamp and speaker-level inputs
  • speaker-level inputs require RCA adapter cables
  • optional wired remote level controller available
  • fuse rating: 30A x 3
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • dimensions: 14"W x 2-1/16"H x 10-3/4"D
  • warranty: 1 year
  • RMS Power Output (Watts x Channels): 75 x 4/250 x 2
  • Peak Power Output (Watts x Channels): N/A
  • Power at 2 Ohms (Watts x Channels): 100 x 4
  • Bridged Power (Watts x Channels): 200 x 2
  • Minimum Impedance Bridged: 4
  • Minimum Impedance Unbridged: 2
  • Minimum Impedance: 2
  • Best Frequency Response: 10-45k Hz
  • THD at Rated RMS Power: 1%
  • Signal to Noise Ratio: 85 dB
  • Input Voltage: 14.4v
  • Amplifier Class: D
  • Low-Pass Crossover Frequency: 50-400 Hz
  • Low-Pass Slope (dB/octave): 12 dB/octave
  • High-Pass Crossover Frequency: 50-6000 Hz
  • High-Pass Slope (dB/octave): 12 dB/octave
  • Bass Boost: No
  • Bass Boost Frequency: N/A
  • Fan Cooled: No
  • Fuse Rating: 90
  • Speaker Level Inputs: Yes
  • Preamp Outputs: No
  • Width (inches): 14
  • Height (inches): 2-1/16
  • Depth (inches): 10-3/4
  • Parts Warranty: 1 Year
  • Labor Warranty: 1 Year

 

  • UPC: 793276242952
  • Weight: 10
  • Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.

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Write a review!
  • This Alpine R series amp is killer, man! So far, it's perfect, just what I'd expect. Super flexible and easy to configure. Offers mad value and versatility, few other six-channel amps can match it. The extra power rocks for midbass drivers, and that bandpass filter feature is dope. Solid build quality and feel. It's a solid amp for a full car upgrade. Total win, no doubt!

    Andrei
    1/2/2024

  • Controls can be overwhelming, but once you understand how they work, you’ll immediately love this 6ch amp from Alpine. Great balanced sound with my 6.5 speakers and subs and it can surely go loud if you push the volume to the max.

    Willy
    2/9/2024

  • Had it set up on my Tacoma for five months now and its performing out pretty well. Connected two pairs of speakers and a sub, leaving out the last channel for another sub in the future, and the filters are really very helpful in tuning out the audio components to what I want to hear from them.

    Jaime
    3/5/2024

  • it's been two months since I bought this Alpine amp and I can't really get over how great it is. it's my first time buying a $600 amplifier, and you really get with what you pay for it. planning to buy a subwoofer and now I don't think I have to power up the sub. this amp can totally take one.

    Joel
    3/14/2025
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