
Monoprice
Monoprice 44516 CSW-12 - 12" 400W Compact Subwoofer
★★★★★
400W
A 12-inch 400-watt powered subwoofer that delivers deep, impactful bass from a surprisingly compact ported enclosure.
$423.96*
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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.
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Overview
Key Features
12" Driver
400W Amplifier
Compact Enclosure
RCA and High-Level Speaker Inputs
Phase Control and Crossover Setting
Specifications
Driver Size
12 inches
Amplifier Power
400 Watts
Enclosure Type
Compact, Ported
Inputs
RCA and High-Level Speaker Inputs
Controls
Phase Control, Crossover Setting
Model
44516 (CSW-12)
Pros & Cons
👍 Pros
- 400-watt built-in amplifier produces powerful, room-filling bass
- 12-inch driver reaches low frequencies that smaller subwoofers cannot match
- Compact ported enclosure saves floor space compared to similarly sized drivers
- Both RCA and high-level speaker inputs provide flexible connection options
- Phase control and crossover adjustment allow precise blending with existing speakers
👎 Cons
- A 12-inch powered sub still has noticeable physical presence despite the compact design
- Weight of the unit may make repositioning it for optimal placement cumbersome
- Ported design can produce port noise at very high volume levels
- No wireless connectivity — requires a physical cable run to the audio source
Frequently Asked Questions
What type of inputs does the CSW-12 accept?
It includes both RCA line-level inputs and high-level speaker inputs, so it can connect to a wide range of receivers, amplifiers, and soundbars.
Does the CSW-12 have a built-in amplifier or does it need an external amp?
It has a built-in 400-watt amplifier, so no external amplification is needed — just connect it to your audio source and a power outlet.
Can I adjust the crossover frequency and phase on this subwoofer?
Yes, the CSW-12 includes a variable crossover control and a phase switch, allowing you to blend its output smoothly with your main speakers.
How large is this subwoofer compared to typical 12-inch models?
Monoprice designed the CSW-12 with a compact ported enclosure that takes up less floor space than many competing 12-inch subwoofers while still delivering deep bass output.