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Deal.ai › Hifonics › 4 Channel Car Amplifiers
Hifonics
Hifonics HCM-400.4D 4-Channel 400W Max Super D-Class Ultra-Compact Car Amplifier

Hifonics HCM-400.4D 4-Channel 400W Max Super D-Class Ultra-Compact Car Amplifier

Best price now

$104.95at WalmartChecked 1 h ago

45% under what the other stores charge

Compared across 11 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $104.95 at Walmart (checked Nov 12, 2026).
  • Checked at 11 stores.

Our take on the Hifonics HCM-400.4D 4-Channel 400W Max Super D-Class Ultra-Compact Car Amplifier

The Hifonics HCM-400.4D is a four-channel car amplifier in the Colossus Mini line, rated at 400 watts max and built on Hifonics' Super D-Class topology. It is small and light, so it fits motorcycles, UTVs and tight car installs where a full-size amp will not go. Power is modest: 4 x 50 watts at 4 ohms, 4 x 100 watts at 2 ohms, or 2 x 200 watts bridged. It has variable high- and low-pass crossovers, speaker-level inputs and a bass control, which is more tuning than most amps this size offer. It suits people powering door speakers or a small sub, not anyone chasing big output.

Best forMotorcycle and UTV audio buildsTight spaces behind a dash or seatPowering four speakers from a factory head unitA small bridged subwoofer setup
Pros
  • Very compact and light at about 3.75 lbs
  • Speaker-level inputs work with factory radios
  • Variable high- and low-pass crossovers plus bass control
  • Bridges to two channels for a sub
  • Mass-loaded aluminum heat sink for cooling
Cons
  • 400 watts is max rating; real output is 50-100 watts per channel
  • Needs an external 40A fuse, not included in the amp
  • Only 4 AWG power terminals, limiting big wiring
  • Super D-Class design is efficiency-focused, not audiophile-grade

Hifonics HCM-400.4D 4-Channel 400W Max Super D-Class Ultra-Compact Car Amplifier prices at every store

  • WalmartNew

    In stockSold by Audiosavings

    $104.95Free shippingChecked 1 h ago
    Visit Walmart
  • SonicElectronix.comNew

    In stock

    $189.99Free shippingChecked 1 h ago
    Visit SonicElectronix.com
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $104.95Free shippingChecked 1 h ago
    Visit Amazon
  • AudiosavingsNew

    Availability unknown

    $104.95Checked 1 h ago
    Visit Audiosavings
  • eBayNew

    Availability unknownSold by audiosavings

    $104.95Checked 1 h ago
    Visit eBay
  • AVLeaderzNew

    Availability unknown

    $189.99Checked 1 h ago
    Visit AVLeaderz
  • Online Car StereoNew

    Availability unknown

    $189.99Checked 1 h ago
    Visit Online Car Stereo
  • Absolute USANew

    Availability unknown

    $219.99Checked 1 h ago
    Visit Absolute USA
  • East Car AudioNew

    Availability unknown

    $289.99Checked 1 h ago
    Visit East Car Audio
  • Fuego Bass ShopNew

    Availability unknown

    $289.99Checked 1 h ago
    Visit Fuego Bass Shop
  • SearsNew

    Availability unknown

    $348.31Checked 1 h ago
    Visit Sears

Also available at

  • WalmartCheck price at Walmart

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Hifonics HCM-400.4D 4-Channel 400W Max Super D-Class Ultra-Compact Car Amplifier price history

Lowest price we've seen: $104.95 on Nov 12 at Walmart. Tracked across 11 stores since Nov 12.

About the Hifonics HCM-400.4D 4-Channel 400W Max Super D-Class Ultra-Compact Car Amplifier

The Hifonics HCM-400.4D Colossus Mini is an ultra-compact four-channel car amplifier rated at 400 watts max. Its small footprint suits motorcycles, UTVs and automotive vehicles. It uses a full-range Super D-Class (Class-D) design, which works with a wide range of drivers, including pro-style speakers.

The amplifier has a mass-loaded extruded aluminum heat sink, so it needs no cooling fan. Ultra-Fi MOSFET output devices and an air core transformer power supply handle the output. Multi-layer circuit boards with surface mount components keep the design clean. Over/under voltage, short circuit and thermal protection circuits are built in.

The four channels run in stereo or in mono bridged mode. Nickel-plated RCA jacks and speaker-level inputs handle the signal connection. A delayed turn-on function helps prevent turn-on and turn-off noises such as hisses and pops. Molded, angled terminals take all power, ground and speaker connections. A bass remote is included. Its LED shows green when the amplifier is on and red when it enters protect mode.

Series
Colossus Mini
Color
Black
Amp class
Super D-Class (full-range Class-D)
Channels
4
Max power
400 watts
Power at 2 ohms
4 x 100 watts
Power at 4 ohms
4 x 50 watts
Bridged power
2 x 200 watts at 4 ohms (mono bridged)
Crossover
Variable electronic, 12 dB per octave
High-pass filter
15 Hz to 1 kHz
Low-pass filter
30 Hz to 2.5 kHz
Tone control
Built-in bass control
Input voltage range
0.2 to 5 V
Frequency response
10 Hz to 25 kHz
Signal-to-noise ratio
Greater than 85 dB
THD
Less than 0.5%
Inputs
Nickel-plated RCA; speaker-level inputs
Power terminal
4 AWG
Speaker terminal
12 AWG
Fusing
External 40A
Protection
Over/under voltage, short circuit, thermal
Cooling
Mass-loaded aluminum heat sink, no fan
Compatibility
Universal vehicles
Dimensions
11.31 x 6.88 x 4.13 in
Item size
9.3 in long x 5.28 in wide x 2.72 in high
Weight
3.75 lbs
Warranty
1 year
Included
Bass remote

Specifications

color
BlackSource

Questions and answers

How much power does the HCM-400.4D really make?
Hifonics rates it 4 x 50 watts at 4 ohms and 4 x 100 watts at 2 ohms, with 2 x 200 watts bridged at 4 ohms. The 400-watt figure is the max total rating.
Will it work with a factory head unit?
Yes. It has speaker-level audio inputs, so it can take signal from a stock radio without a separate line-output converter.
Can I run a subwoofer on it?
Yes, in bridged mode. Bridging two channels gives 200 watts at 4 ohms, enough for a small sub. For a big sub, a dedicated mono amp is a better fit.
What gauge wiring does it take?
Power and ground terminals accept 4 AWG wire, and speaker terminals take 12 AWG. It uses an external 40A fuse.
Does it fit a motorcycle or UTV?
It is built for that. The chassis is about 9.3 by 5.3 by 2.7 inches and weighs 3.75 lbs, small enough for fairings, saddlebags and UTV panels.
What crossover settings does it have?
Variable high-pass from 15Hz to 1kHz and low-pass from 30Hz to 2.5kHz, both 12dB per octave, plus a built-in bass control.
Where is the Hifonics HCM-400.4D 4-Channel 400W Max Super D-Class Ultra-Compact Car Amplifier cheapest?
At Walmart, for $104.95, 45% under what the other stores charge, as of our latest check.
Where can I buy the Hifonics HCM-400.4D 4-Channel 400W Max Super D-Class Ultra-Compact Car Amplifier?
11 stores we checked sell it, including Walmart, Amazon, Audiosavings, eBay, SonicElectronix.com.

Stores we've priced the Hifonics HCM-400.4D 4-Channel 400W Max Super D-Class Ultra-Compact Car Amplifier at

  • Absolute USA deals and prices
  • Audiosavings deals and prices
  • AVLeaderz deals and prices
  • East Car Audio deals and prices
  • Sears deals and prices
  • SonicElectronix.com deals and prices
  • Walmart deals and prices
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