Is the 4,000W rating real RMS power?

No. It is a peak/max rating. Continuous RMS output is much lower, so plan your subwoofer and wiring around realistic power, not the headline number.

Will it power a single subwoofer?

Yes. It is a monoblock, so it is made for one subwoofer channel. Match the sub's impedance and RMS rating to the amp's actual continuous output.

Does it fit in a small space?

Yes. The Class-D design is compact, which is its main selling point for behind-seat or small-trunk installs. Check the mounting dimensions against your space before buying.

Do I need to upgrade my electrical system?

For high output, yes. A large amp draws significant current, so a stout power wire, good ground and a healthy battery and alternator matter more than the badge rating.

How does it compare with premium monoblocks?

It costs far less and is smaller, but premium amps typically deliver more honest continuous power and better onboard tuning and protection. Choose it for budget and size, not maximum clean output.

Power Acoustik MICRO1-4000D 1-CH Monoblock 4000W Max Class-D Compact Amplifier

Best price now

$154.99at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

Power Acoustik MICRO1-4000D 1-CH Monoblock 4000W Max Class-D Compact Amplifier

Best price now

$154.99at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $154.99 at Walmart on Nov 9.

Our take on the Power Acoustik MICRO1-4000D 1-CH Monoblock 4000W Max Class-D Compact Amplifier

The Power Acoustik MICRO1-4000D is a compact Class-D monoblock car amplifier rated at 4,000 watts max, built to drive a subwoofer in a small footprint. Class-D operation runs cooler and draws less current than an equivalent Class-AB amp, which is why it suits tight installs behind a seat or in a small trunk. It is a budget-oriented amp, so the max rating is a peak figure, not RMS; expect real continuous output to be well below 4,000 watts. Shoppers comparing it with pricier monoblocks should weigh its small size and low cost against modest clean-power headroom and basic onboard controls.

Best forSubwoofer duty in a compact installBudget builds needing a small footprintDrivers who want Class-D efficiencySpace-limited trunks and behind-seat mounts

Pros

Compact Class-D chassis fits tight spaces
Monoblock design dedicated to a subwoofer
Runs cooler and draws less current than Class-AB
Simple, low-cost way to add bass power

Cons

4,000W is a max rating, not RMS output
Clean continuous power is modest for the badge
Basic controls and protection versus premium amps
Real-world output depends heavily on electrical supply

Power Acoustik MICRO1-4000D 1-CH Monoblock 4000W Max Class-D Compact Amplifier prices at every store

WalmartNew
In stockSold by Deals UnlimitedReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$154.99Free shippingChecked Nov 9
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About the Power Acoustik MICRO1-4000D 1-CH Monoblock 4000W Max Class-D Compact Amplifier

The Power Acoustik MICRO1-4000D is a compact monoblock car amplifier. It has one channel and a Class-D design. It is rated for 4000W max power.

Type: Monoblock car amplifier
Channels: 1
Class: Class-D
Max power: 4000W
Color: Black

Specifications

color: BlackSource
size: 6" x 9"Source

Questions and answers

Is the 4,000W rating real RMS power?: No. It is a peak/max rating. Continuous RMS output is much lower, so plan your subwoofer and wiring around realistic power, not the headline number.
Will it power a single subwoofer?: Yes. It is a monoblock, so it is made for one subwoofer channel. Match the sub's impedance and RMS rating to the amp's actual continuous output.
Does it fit in a small space?: Yes. The Class-D design is compact, which is its main selling point for behind-seat or small-trunk installs. Check the mounting dimensions against your space before buying.
Do I need to upgrade my electrical system?: For high output, yes. A large amp draws significant current, so a stout power wire, good ground and a healthy battery and alternator matter more than the badge rating.
How does it compare with premium monoblocks?: It costs far less and is smaller, but premium amps typically deliver more honest continuous power and better onboard tuning and protection. Choose it for budget and size, not maximum clean output.
Where is the Power Acoustik MICRO1-4000D 1-CH Monoblock 4000W Max Class-D Compact Amplifier cheapest?: At Walmart, for $154.99, as of our latest check.