Monoprice Monolith 12″ Ported Sub is $640 on Amazon

You don’t have to wait until Amazon Prime Day to get a great deal on a Monoprice Monolith 12″ Ported THX Ultra subwoofer. The regular list price for this powerful subwoofer is $800 plus shipping, or $880 including shipping on Amazon. With this Amazon deal you save a minimum of $160, and up to $240 versus Amazon, bringing the total down to $640.

This Monoprice subwoofer is THX Ultra certified, guaranteeing that it will deliver a bracing home theater experience with deep bass that’s at once loud and free of audible distortions.

Monoprice Monolith 12″ ported THX Ultra subwoofer rear view – Photo from

This sub sports a 500 W amplifier to drive a high-excursion 12″ driver. The ported cabinet features internal bracing and is made of HDF for high stiffness. Supplied plugs allow you to convert it from a ported sub into a sealed sub, depending on your needs.

The Monolith 12″ ported sub is extremely capable, just check out the specs:

Frequency Response (-6dB)

Sealed: 26 Hz – 200 Hz (29 Hz – 200 Hz THX)

Vented (1 port): 19 Hz -200Hz (23 Hz – 200 Hz THX)

Vented (2 ports): 18 Hz -200Hz (20 Hz – 200 Hz THX)

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