Garage
Shop

See all parts that fit your 2005 Five Hundred

RE Audio SA 90.4

800W Dynamic Power (340W RMS) Ultra-Compact 4-Channel SA Series Class D Amplifier

RE Audio
Shop all RE Audio
Product videos
highlight-star-icon

• RMS Power: 63W x 4 @ 4 ohm, 85W x 4 @ 2 ohm
• Total Peak Power: 800W
• CEA-2006 Compliant
• Dimensions: 4.72" W x 7.87" L x 1.57" H

Learn more about the sa904

We apologize

This item has been discontinued


Loading...
FD1426B main

Scosche FD1426B

Double DIN Stereo Dash Kit for select 2004-2009 vehicles from Ford, Mercury, Lincoln (Black)

118
-6.69%

$13.95

List price $14.95

70-5520 main

Metra 70-5520 Wiring Harness

Install a new car stereo in select 2003-2016 vehicles from Ford, Mercury, Lincoln

56
99-5807 main

Metra 99-5807 Dash Kit

Install a new Single-DIN or Double-DIN car stereo in select 2005-2009 vehicles from Ford, Mercury

3
-43.76%

$17.99

List price $31.99

FMK540 main

American International FMK540

Single DIN or Double DIN Stereo Dash Kit for select 2004-2016 vehicles from Ford, Lincoln, Mercury

14
-71.82%

$10.99

List price $39.00

iLX-W650 main

Alpine iLX-W650

7" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)

123
-5.72%

$329.95

List price $349.95

DMX129BT main

Kenwood DMX129BT

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth

2
-26.30%

$199.00

List price $270.00

TS-G6930F main

Pioneer TS-G6930F

800W Peak (90W RMS) 6x9" G-Series 3-way 4-ohm Coaxial Car Speakers

14
-25.01%

$59.99

List price $80.00

480BRGB main

Boss Elite 480BRGB

Double DIN Digital Media Receiver with Bluetooth

17

JVC KW-R950BTS

Double DIN CD Receiver with Bluetooth and Built-in Alexa (Sirius XM Ready)

6
-10.58%

$169.00

List price $189.00

Pioneer TS-A6881F

700W Peak (160W RMS) 6x8" A-Series 4-way 4-ohm Coaxial Car Speakers

5
-40.01%

$65.99

List price $110.00

Product Highlights


• RMS Power: 63W x 4 @ 4 ohm, 85W x 4 @ 2 ohm
• Total Peak Power: 800W
• CEA-2006 Compliant
• Dimensions: 4.72" W x 7.87" L x 1.57" H

Description


RE Audio brand icon

Authorized dealer

General Features:

  • SA Series 4-Channel Full Class Car Amplifier
  • RMS Power Rating:
    • 4 ohm: 63 watts x 4 chan.
    • 2 ohm: 85 watts x 4 chan.
    • Bridged, 4 ohm: 151 watts x 2 chan.
  • Max power output: 800 watts
  • 4 or 2 channel operation
  • Speaker-level (high-level) inputs
  • Variable high-pass filter (80 Hz, 24 dB/octave)
  • Variable low-pass filter (80 Hz, 24 dB/octave)
  • Subsonic filter (24 dB at 15 Hz)
  • Frequency Response: 10-40,000 Hz
  • Signal-to-Noise Ratio: 80dB
  • 8 gauge power and ground wiring is required for installation
    • Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier
  • Dimensions: 4.72"W x 7.87"L x 1.57"H
  • Also found as: SA904, SA90.4
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Loading...
REF507CF_2_MET-825601_2 main

2 Infinity REF507CF (INFSPKRF507CFUS) w/ Adapter Plates

390W Peak (130W RMS) 5.25" Reference Series 2-way 3-ohm Component Speaker System with Speaker Adapter Plates

3
-12.14%

$477.88

List price $543.88

BV850ACP main

Boss Elite BV850ACP

6.75" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto with Backup Camera

5
Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

122
-33.36%

$79.96

List price $119.99

Limited time!
46CSC6934 main

Kicker CSC693 (46CSC6934)

900W Peak (300W RMS) 6x9” CS Series 3 Way Coaxial 4-ohm Speakers with Integrated Midrange Speakers

40
-30.02%

$111.96

List price $159.99

DMH-1800NEX main

Pioneer DMH-1800NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready

2
-16.67%

$349.99

List price $420.00

iLX-W650 main

Alpine iLX-W650

7" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)

123
-5.72%

$329.95

List price $349.95

DMH-W4660NEX main

Pioneer DMH-W4660NEX

6.8" Double DIN Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Android Auto (SiriusXM Ready)

2
-20.00%

$599.99

List price $750.00

43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

28
-10.53%

$84.99

List price $94.99

DB652 main

Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

12
-9.16%

$109.00

List price $119.99

Limited time!
Club 622 main

JBL Club 622

360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers

5
-28.58%

$99.95

List price $139.95


Best selling similar products

VADM4v2 small

NVX VADM4 v2 (VADM4v2)

• 80 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(41)

$209.99

List price $239.99

NDA6004 small

NVX NDA6004

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(14)

$159.99

List price $215.99

MFA 4.220 small

Deaf Bonce MFA 4.220

• 220 watts x 4 channel @ 4 ohm
• 330 watts x 4 channel @ 2 ohm
• Bridged: 660 watts x 2 channel @ 4 ohm
• Total RMS Power: 1320 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$289.90

List price $289.90

RD400/4 small

JL Audio RD400/4

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(28)

$379.99

List price $379.99

MFA 4.180 small

Deaf Bonce MFA 4.180

• 180 watts x 4 channel @ 4 ohm
• 270 watts x 4 channel @ 2 ohm
• Bridged: 540 watts x 2 channel @ 4 ohm
• Total RMS Power: 1080 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$259.90

List price $259.90

JD400/4 small

JL Audio JD400/4

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(34)

$299.99

List price $299.99

VAD10004v2 small

NVX VAD10004 v2 (VAD10004v2)

• 150 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(24)

$279.99

List price $335.99

MVPA4 small

NVX MVPA4

• 100 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(70)

$279.99

List price $383.99

AP200/4BT small

JL Audio AP200/4BT

• 40 watts x 4 channel @ 4 ohm
• 50 watts x 4 channel @ 2 ohm
• Bridged: 100 watts x 4 channel @ 4 ohm
• Total RMS Power: 200 watts
• Class D 2 ohm Stable 4-Channel Amplifier

$549.99

List price $659.99

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
63 watts x 4 channel
RMS Power @ 2 ohms
85 watts x 4 channel
Bridged RMS Power
151 watts x 2 channel
Amplifier Specifications
Number of Channels
4-Channel
Total Peak Power Output
800 watts
Maximum Input Gauge Size
8 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
.05%
Speaker Level Inputs
Yes
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Signal-to-Noise Ratio
80 dB
Fuse Rating
40A x 1 
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

SA 90.4

Weight:

5.50lbs

Internal SKU:

sa904

Internal Product ID:

92496

Product and How-to Videos


  • RE Audio New Product Line Overview | CES 2015
  • How To Install an Amplifier: Car Amplifier Basics Part 2

Customer Ratings & Reviews


RE Audio SA 90.4 thumbnail image

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



Durability
5
Value
5
Features
5
Design
4.5
Usability
5

Customer Reviews

Sort by:

Loading...

Great amp! Big power! Stable and efficient!

Hi guys, just a review on this amp for you guys. At first I was skeptical about it as it is a very small amp and the power ratings doesn't seem promising. I went on to purchase with my gut and hope it turns out well. Also the reason I had very limited space in my car.
Self installed it under the passenger seat, fits like a charm. Now comes the testing stage. This amp was installed to power 2 sets of speakers. A Focal Access 165AS and a JBL GTO coaxial speakers. Both speakers rates at 80W RMS where the amp states only 63W RMS x 4 channels. Turned it on, did some settings on the crossover and stereo. Then I start to crank up the volume to 35 on my Pioneer deck. I can say that the highs are clear (not audiophile like the Audisons), the bass was strong and hits hard on the mids as well as the coax at the rear. I pushed the gain up to about 70% and the speakers started to distort, I was in awe. What the heck? The speakers should be able to take more if you match the RMS ratings so I took my eBay bought RMS test kit to check the actual power it shows. At 70% gain on the SA amp, it shows 83W RMS on each channel with +- 3W RMS on every other. I was literally amazed, played it at the same setting for about 30 mins. Touched the amp and it was warm but not hot. You can still lay your fingers on it. Stopped and opened up the amp, double sided PCB and the components that I don't understand but look good though.
All in all, for such prices I would recommend this amp to anyone. Now time to push the gains higher and see what happens, might even test it with a 300W sub and see if it cuts out.

By aeonic on October 29, 2015

13 found this helpful


Dam good amps 90.4-channel and 300.1 mono digital R.E. AMPS

R.E. WONT DISAPPOINT YOU GREAT AMPS SOUND IMPRESSIVE,POWERFUL, CLEAN SOUND....5 stars

By James Heidelberg on November 11, 2016

11 found this helpful




99-9008 small

Metra 99-9008 Dash Kit

Install a new Single-DIN car stereo in select 1998-2010 Beetle

$27.99

List price $31.99

LITEBOX4 small

VIBE Audio LiteBox Stereo 4 (LiteBox4)

1000W Max, SuperCar Series 4-Channel Hybrid Amplifier (Lite Box 4, LITEBS4-V1)

(6)

$149.99

List price $479.99

PSW810E small

Alphasonik PSW810E Open Box

(Open Box) 10" Dual 4 ohm ALPHA 800 Series Subwoofer

$104.99

List price $199.99

AVIC-S2 small

Pioneer AVIC-S2

Portable Smart GPS Navigation with 3.5-inch Touch Panel Display

(2)

$262.99

List price $399.99

99-7320 small

Metra 99-7320 Dash Kit

Install a new Single-DIN car stereo in select 2006-2008 Sonata

(1)

$56.99

List price $27.99

16-PR300.2 small

Memphis 16-PR300.2

600W Max, Power Reference 2-channel Amplifier

(2)

$209.99

List price $349.99

NVX227 small

Jensen NVX227

(NVX-227) Portable GPS Navigation Unit with 3.5" Touchscreen TFT-LCD Monitor

$159.99

List price $499.99

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2005 Ford Five Hundred

1996 Ford Probe

1977 Dodge Monaco

2011 Audi A4

2002 Saab 9-3

2011 BMW X3

2012 Subaru Outback

2011 BMW X6

2002 Ford Explorer

2002 Ford Thunderbird

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.