Monoprice Monolith 10 THX Select Review: Rated 3.6/5

Last updated: October 21, 2026

The Monoprice Monolith 10 THX Select is rated 3.6/5 for sound quality, #127 of 212 Medium Home Subwoofers (30-75 lbs). See all Subwoofers rankings for every top pick.

Monoprice Monolith 10 THX Select · Editor's rating 3.6/5, ranked #127 of 212 Medium Home Subwoofers (30-75 lbs)

Prices on this page were last checked October 29, 2026 at 4:42 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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Brand: Monoprice

#127 Monoprice Monolith 10 THX Select: $699 Discontinued eBay

Newer model: the Monoprice Monolith M-10 V2, ranked lower, rated 3.4/5, released Nov 2021. See every Monoprice Monolith generation.

Pros: A THX certified 10 inch ported subwoofer with a sturdy cabinet and balanced inputs, now discontinued. THX-certified 10-inch ported with 500W amp extends down to 20Hz with no internal resonance or port noise. HDF cabinet construction ensures inert enclosure. Variable phase adjustment and robust built-to-last design.

Cons: The 10-inch gives up a lot of output to the 12 and 15-inch Monolith models, and the plain finish has no gloss black option. THX EQ mode is cleaner than the Extended EQ but gives up some of the very deepest extension. Discontinued.

Notes: Product # 24456

Is the Monoprice Monolith 10 THX Select right for you?

Skip it if

  • you need to move it often (33 kg each).
  • you want to buy it new: it is discontinued.
Released2017 (9 years ago)
AES InputNo
Amplifier Power500W RMS
Aux InputNo
CEA-2010-A Average (40-80Hz)111.5 dB
Cabinet Colorblack
Coaxial InputNo
CountryUnited States
Dimensions18.9”H x 15”W x 19.7”D (480.1 x 381.0 x 500.4 mm)
Drivers10” (254mm) driver
Enclosureported, front
Frequency Response17-20Hz
HDMI InputNo
InputsXLR, RCA, XLR passthrough out
Measurement SourceErinsAudioCorner
Optical InputNo
Output SPL at 15 Hz95.4 dB
Output SPL at 20 Hz102.6 dB
Output SPL at 25 Hz107.7 dB
Output SPL at 31.5 Hz109.0 dB
Output SPL at 40 Hz110.0 dB
Output SPL at 50 Hz112.0 dB
Output SPL at 63 Hz112.0 dB
Output SPL at 80 Hz112.0 dB
Output SPL at 100 Hz112.0 dB
Output SPL at 125 Hz111.0 dB
RCA InputYes
TRS InputNo
USB InputNo
Warranty5
Weight72.5 lbs (32.9 kg)
XLR InputYes

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