Monoprice
Monoprice 142851 Monolith M-15 V2 15" THX Subwoofer
★★★★★
1000W
Experience Immersive Bass: Monolith M-15 V2 Powered SubwooferThe Monolith M-15 V2 sets a new standard for deep, impactful bass in home theater systems. THX Certified Ultra, this 15-inch powered subwoofer delivers low distortion and high power output down to well under 20Hz. Its redesigned cabinet...
$1,599.99*
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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
Experience Immersive Bass: Monolith M-15 V2 Powered Subwoofer
The Monolith M-15 V2 sets a new standard for deep, impactful bass in home theater systems. THX Certified Ultra, this 15-inch powered subwoofer delivers low distortion and high power output down to well under 20Hz. Its redesigned cabinet features a sleek look and is built with HDF material, ensuring a sonically inert enclosure for pure, unadulterated bass.
Specifications
- Brand: Monoprice
- Model: 142851
- Woofer Size: 15-inch
- Amplifier Power: 1000 Watts RMS (1800 Watts Peak)
- Certification: THX Certified Ultra
- Cabinet Material: HDF (High Density Fiberboard)
- Inputs: RCA and XLR
- Finish: Black Ash
- Features: Low Distortion, High Power Output, Vented HDF Cabinet, RCA and XLR Inputs
Key Features
THX Certified Ultra: THX engineers completed hundreds of different scientific tests to ensure the highest audio performance possible. The tests ensure the speaker can reach the high volumes necessary to achieve THX Reference Level without creating audible distortion or artifacts. THX Certified Ultra products are for large sized rooms, up to 3,000 cubic feet in size, with a 10 12 foot viewing distance from the screen.
15" Woofer: The Monolith 15" driver was developed from the ground up, with a design focus on achieving output, accuracy, dynamics, and linearity, while minimizing distortion. Enclosed in a cabinet made from HDF material, massive internal bracing, and outfitted with three ports that can utilize foam plugs to run the subwoofer in a sealed mode.
1000 Watt Amplifier: The 1000W RMS amplifier is built around a Texas Instruments 48‑bit data path (with 28‑bit filter coefficients) and DSP engine. Each amplifier's transfer function, power output limiting, and thermal protection are monitored to the millisecond and are customized for each individual driver. The high efficiency Class D amplifier modules are based on a proven topology that has been continuously refined over the past 6 years. The amplifier has vast reserves of power for highly
Cabinet and Internal Bracing: HDF (High Density Fiberboard), not MDF, was utilized resulting in a sonically inert cabinet. Internal bracing has been strategically placed to increase overall cabinet strength and limit unwanted panel vibrations that would cause discoloration and distortion. The strong cabinet and bracing combine to ensure you hear massive amounts of bass, not cabinet resonances.
All Amp'd Up: The Monolith subwoofer amplifier has an extraordinarily high power output of 1000 watts RMS (1800 watts peak), which can deliver massive amounts of power when needed. Each Class D amplifier is built around a Texas Instruments 48 bit data path (with 28 bit filter coefficients) DSP engine, allowing virtually unlimited design flexibility with the assurance of no signal degradation.
Specifications
Woofer Size
15"
Amplifier Power
1000W RMS (1800W Peak)
Amplifier Type
Class D
DSP Engine
Texas Instruments 48-bit data path (28-bit filter coefficients)
Cabinet Material
HDF (High Density Fiberboard)
Ports
Three (with foam plug capability)
Certification
THX Certified Ultra
Room Size Recommendation
Up to 3,000 cubic feet
Viewing Distance Recommendation
10-12 feet
Pros & Cons
👍 Pros
- THX Certified Ultra, guaranteeing the highest audio performance for large rooms up to 3,000 cubic feet.
- Features a 15" woofer developed from the ground up for exceptional output, accuracy, dynamics, and linearity with minimal distortion.
- Equipped with a powerful 1000 Watt RMS (1800 watts peak) amplifier for massive power delivery when needed.
- The cabinet is constructed from HDF (High Density Fiberboard) with massive internal bracing, ensuring a sonically inert enclosure.
- Allows for flexible operation in either ported or sealed mode by utilizing foam plugs for the three ports.
👎 Cons
- Its large 15" woofer and robust cabinet construction likely result in a significant physical footprint, requiring considerable space.
- The THX Certified Ultra designation indicates it's designed for large rooms, potentially overpowering smaller listening spaces.
- The powerful 1000W amplifier, while a pro, may contribute to a higher power consumption compared to less powerful subwoofers.
- The need to utilize foam plugs for sealed mode operation adds a manual step for users who want to switch modes.
- Specific frequency response details are not provided, which could be a key consideration for audio enthusiasts.
Frequently Asked Questions
What does THX Certified Ultra mean for this subwoofer?
THX Certified Ultra signifies that this subwoofer has passed rigorous scientific tests by THX engineers to ensure the highest audio performance, making it suitable for large rooms up to 3,000 cubic feet with a 10-12 foot viewing distance.
What is the size of the woofer in the Monolith M-15 V2 subwoofer?
The Monolith M-15 V2 features a large 15" woofer, which was developed for achieving high output, accuracy, dynamics, and linearity with minimal distortion.
How powerful is the amplifier in this subwoofer?
It is equipped with a 1000 Watt RMS amplifier, capable of delivering up to 1800 watts peak power, ensuring vast reserves for demanding audio.
What material is the cabinet made from, and how does it contribute to sound quality?
The cabinet is constructed from HDF (High Density Fiberboard), not MDF, combined with massive internal bracing to create a sonically inert enclosure, preventing unwanted panel vibrations and distortion.
Can this subwoofer operate in different modes?
Yes, the subwoofer is outfitted with three ports that can utilize foam plugs to run the subwoofer in a sealed mode, offering flexibility in sound delivery.
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