Monoprice Monolith K-BAS Bookshelf Speakers



Ships From: United States (US)

Sold By : TX Saint Store
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I am selling my Monoprice Monolith K-BAS Bookshelf Speakers. I am the original owner. Less than one year old.

As far as I know, these speakers provide the lowest bass of any bookshelf speaker at their size and price. You will not need a subwoofer in a small room.

Conservatively rated at 9 out of 10. Excellent condition (but not perfect). There are small blemishes on the bottom of the speakers.

MSRP: $500 per pair

Manufacture Description

Enjoy great bass in a bookshelf space! The Monolith K-BĀS Reference Series Bookshelf Speakers utilize K-BĀS (Kinetic Bass Amplification System) technology to give you low bass extension that no other speaker at this size or in this price range can match. Featuring an impressive soundstage, pinpoint detail, and incredible articulation – all with bass you can feel – these speakers are perfect for apartment dwellers, audiophiles, or anyone that loves great sound!

How K-BĀS Works

A unique cabinet design and a variety of existing speaker port technologies (acoustic suspension, bass reflex, and transmission line) have been combined in a way that simply defies belief! Low frequency sound waves travel through the internal cabinet into a specially designed chamber. This chamber amplifies the driver’s backwave, significantly increasing the kinetic bass energy as the air is accelerated out of the vent. The result is that the frequency response is greatly enhanced and dynamic range is dramatically increased.


  • 2 -way speaker with K-BAS front-ported transmission line
  • Finish – semi-gloss black
  • Polypropylene + Mica 5.25″ woofer
  • Liquid-Cooled 1″ titanium tweeter
  • 87 dB sensitivity
  • 8 ohm impedence
  • Frequency range: 39Hz to 20kHz +/-2.2dB
  • Dimensions: 15.8″H x 7.2″W x 11.8″D

Manufacture web site:

Note: on the manufacture web site, price is per speaker, not per pair.


Buyer pays shipping and Paypal fees.

It will be shipped in the original manufacture’s box and packing foam (2 boxes).

No international shipping.

Shipping to the lower 48 states only.

Use the Fedex shipping calculator to calculate your shipping (choose Fedex Ground).

Weight = 19.5 lbs (per box – there are 2 boxes); 21″H x 17″W x 12″D (per box); shipping from zip code 72401.

Returns only allowed for DOA or damage during shipping. If damaged during shipping, you must inspect the boxes before accepting the packages from Fedex and show the Fedex delivery person the damage and take photos before opening the boxes. Returned speakers must be shipped within 7 days and buyer must pay return shipping.

Bid with confidence – I have 100% feedback rating on eBay (rowbozz) and Audiogon (rowbozz).

Additional information






Monolith K-BAS


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Shipping Details

Shipping from United States (US)