Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
Deep discounts on car installation gear
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Trusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
4-channel car amplifier — 97 watts RMS x 4
Item # 070AX490D | MFR # AX490D
This item is no longer available.
Our take on the Axxera AX490D by Crutchfield's Bob Bihlmayer
Axxera's Mini Series car amplifiers pack a lot of sound into a small space. Their AX490D 4-channel amplifier drives each of your front and rear speakers with 97 watts RMS of smile-inducing power, or it'll drive two subwoofers with 275 watts each in two-channel mode. It packs all that Class D power into a package that's only 1-5/8" high and 4-3/4" wide, allowing it to fit under most car seats or just about any tight spot in your vehicle.
The high- and low-pass crossovers allow you to tailor the AX490D's output to your speakers' response. Its variable bass boost lets you add some thump when it's needed. You'll enjoy the additional control and flexibility, and you'll appreciate the price as well.
What's in the Box:
- 4-Channel Class D amplifier
- One 40-amp ATO fuse (installed)
- Two 8" Speaker-level input harnesses
- Four 5/8" Self-tapping screws
- Owner's manual
- 4-channel car amplifier
- 97 watts RMS x 4 at 4 ohms (132 watts RMS x 4 at 2 ohms)
- 275 watts RMS x 2 bridged at 4 ohms (4-ohm stable bridged)
- peak power: 600 watts
- Class D amp technology
- full MOSFET DC-DC PWM power supply
- variable high- and low-pass crossovers (35-350 Hz, 12dB/octave)
- frequency response: 10-35,000 Hz
- preamp and speaker-level inputs
- fuse rating: 40A x 1
- 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
- dimensions: 11-1/16"W x 1-3/4"H x 4-15/16"D
- warranty: 1 year
- Our 60-day money-back guarantee
Features and Specs
|RMS Power Output (Watts x Channels)||
97 x 4
|Peak Power Output (Watts x Channels)||150 x 4|
|Power at 2 Ohms (Watts x Channels)||132 x 4|
|Bridged Power (Watts x Channels)||275 x 2|
|Minimum Impedance Bridged||4|
|Minimum Impedance Unbridged||2|
|Best Frequency Response||10-35k Hz|
|THD at Rated RMS Power||1%|
|Signal to Noise Ratio||90 dB|
|Low-Pass Crossover Frequency||35-350 Hz|
|Low-Pass Slope (dB/octave)||12 dB/oct|
|High-Pass Crossover Frequency||35-350 Hz|
|High-Pass Slope (dB/octave)||12 dB/oct|
|Bass Boost Frequency||N/A|
|Speaker Level Inputs||Harness|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
Channel Configuration: The Axxera AX490D is a 4-channel amp; essentially two full range 2-channel amps built into one chassis. Both sections are bridgeable, so the it can be configured as a 4-channel, 3-channel, or 2-channel amplifier.
- Power Output:
- 4Ω: 97 watts RMS x 4-channels
- 2Ω: 132 watts RMS x 4-channels
- Bridged: 275 watts RMS x 2-channels into 4Ω
Signal Inputs: In addition to the two pair of RCA inputs, two speaker level input harnesses are included to plug into the two high level input ports on the amp.
Auto Turn-on: When using a speaker level input, the amp will turn on automatically when it senses the input signal.
Level Control (Gain): The input levels are independently adjustable for the front and rear channels. The input range is 0.25 Volts to 6.0 Volts.
Crossover: The amp also has independent crossover controls for the front and rear channels. The crossover slopes are 12 dB/octave:
- Crossover Mode: three position switch; choose flat (full range, crossover is bypassed), high pass, or low pass
- Frequency: set the crossover point when in high pass or low pass mode; rotary dial; 35-350 Hz
Power Input: Two set-screw terminals are provided for connecting the power and ground cables. The terminals accept up to 8-gauge wire. The set screws are tightened/loosened with a Phillips head screw driver (not included).
Speaker Outputs: The four pair of speaker output set-screw terminals will accept up to 8-gauge wire. The set screws are tightened/loosened with a Phillips head screw driver (not included).
Line Input: There are two pair of RCA input jacks.
Speaker Level Input: The amplifier has two high level input jacks, for use with the included speaker level harnesses.
Remote Turn-on: The remote turn-on terminal is a set-screw that will accept up to 8-gauge wire. There is also a remote out terminal, useful for turning on another amplifier. The set screws are tightened/loosened with a Phillips head screw driver (not included).
Fuse: The amp has one 40-amp ATO fuse.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.