Now Hiring Window Tinters! Contact Us

25th Anniversary Sale!

$25 OFF ANY ORDER $250 OR MORE | AUTOMATICALLY APPLIED AT CHECKOUT

Popular right now
Lots of people have looked at this recently

Selling fast!
Grab yours while you can
ALPINE  |  SKU: R-A90S

R-A90S R-Series 6/5/3 Channel Power Amplifier with Staggered Power SUMMER SALE!!! IN STOCK NOW

$450.00 $599.99
Shipping calculated at checkout.

Return Policy

Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Learn more

Delivery and Shipping
Free Ground Shipping on all orders $99 and up

3-5 business days delivery time for standard shipping to any of the 48 contiguous U.S. states. Delivery time for standard shipping to Alaska, Hawaii, and Puerto Rico is 5-7 business days. Business days include Monday - Friday and exclude UPS holidays.

Most orders received by 5PM Eastern Time Monday - Friday ship the same day.

We do not ship to freight forwarders. Some items that ship from the manufacturer can only be delivered to addresses within the 48 contiguous states. Call us for delivery information on specific models. Merchandise amount thresholds for shipping prices apply to the cost of items after any special discounts have been applied and exclusive of any tax.

Learn more

Have questions about your product? Chat with us below!

Product Overview

Experience your music in Hi-Res with the versatile R-A90S 6-Channel Amplifier for hair-raising details that puts you in the center of the performance.
6-Channel Amp with 5-Channel Power – With double the power on the last two channels, the R-A90S’s 5th and 6th channels can be bridged to provide up to 500-watts at 4Ω to a subwoofer system such as a pair of S-SB12Vs.
An Amp that Grows with You – When you’re ready to upgrade your Alpine system, use the R-A90S to amplify a 3-way active system with enough mid-bass power to create the up-front bass impact you crave.
Accurate Sound Reproduction – With incredibly low phase shift and hi-resolution frequency response, the R-A90S can reproduce sound with incredible accuracy that stays true to the artist’s intention. 
Tech Specs
  • Dimensions: 12.75" x 10.75" x 2"
  • Hi-Resolution Audio Compliant (40k Hz) 
  • Alpine’s Class D Amplifier Circuit 
  • 75W x 4 + 150W x 2 (4Ω, 14.4V, < 1% THD +N) 
  • 100W x 4 + 250W x 2 (2Ω, 14.4V, < 1% THD +N) 
  • Bridged: 200W x 2 + 500W x 1 (4Ω, 14.4V, < 1% THD +N) 
  • S/N > 85dB (ref. 1W into 4Ω) 
  • THD + N < 0.03% (ref. 10W into 4Ω) 
  • Frequency response: 10-45kHz (0/-3dB)
  • Damping factor > 500
  • CTA-2006

Payment & Security

Payment methods

  • PayPal
  • Venmo

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

ALPINE

R-A90S R-Series 6/5/3 Channel Power Amplifier with Staggered Power SUMMER SALE!!! IN STOCK NOW

$450.00 $599.99

Product Overview

Experience your music in Hi-Res with the versatile R-A90S 6-Channel Amplifier for hair-raising details that puts you in the center of the performance.
6-Channel Amp with 5-Channel Power – With double the power on the last two channels, the R-A90S’s 5th and 6th channels can be bridged to provide up to 500-watts at 4Ω to a subwoofer system such as a pair of S-SB12Vs.
An Amp that Grows with You – When you’re ready to upgrade your Alpine system, use the R-A90S to amplify a 3-way active system with enough mid-bass power to create the up-front bass impact you crave.
Accurate Sound Reproduction – With incredibly low phase shift and hi-resolution frequency response, the R-A90S can reproduce sound with incredible accuracy that stays true to the artist’s intention. 
Tech Specs
  • Dimensions: 12.75" x 10.75" x 2"
  • Hi-Resolution Audio Compliant (40k Hz) 
  • Alpine’s Class D Amplifier Circuit 
  • 75W x 4 + 150W x 2 (4Ω, 14.4V, < 1% THD +N) 
  • 100W x 4 + 250W x 2 (2Ω, 14.4V, < 1% THD +N) 
  • Bridged: 200W x 2 + 500W x 1 (4Ω, 14.4V, < 1% THD +N) 
  • S/N > 85dB (ref. 1W into 4Ω) 
  • THD + N < 0.03% (ref. 10W into 4Ω) 
  • Frequency response: 10-45kHz (0/-3dB)
  • Damping factor > 500
  • CTA-2006
View product
Back to top