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Monoprice
Monoprice Monolith B5 Bookshelf Speaker

Monoprice Monolith B5 Bookshelf Speaker

4.1(18 ratings)

Best price now

$149.99at raptorsupplies.comChecked 10 h ago

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $149.99 at raptorsupplies.com (checked Nov 10, 2026).
  • Checked at 4 stores.

Our take on the Monoprice Monolith B5 Bookshelf Speaker

The Monolith B5 is a compact two-way bookshelf speaker with two 5.25-inch woofers and a 20mm silk dome tweeter in an MDF cabinet. Its 4-ohm load and 84.3dB sensitivity mean it needs a capable amplifier, but the full crossover and dual woofers give it more low-end weight than most small bookshelf speakers. It suits stereo listening and 5.1 movie setups where space is tight. Against rivals like the ELAC Debut and KEF Q150, it trades a little refinement for output and cabinet solidity, and owners rate it well for the money.

Best forSmall rooms and desktop stereo setupsBudget 5.1 home theater surrounds or frontsBuyers with a strong 4-ohm-capable ampListeners who want bass from a compact cabinet
Pros
  • Two woofers give fuller bass than most rivals this size
  • Silk dome tweeter stays smooth and non-fatiguing
  • Solid MDF cabinet with detachable grilles
  • 5-way binding posts accept bare wire, spades or banana plugs
  • Wall-mount brackets and speaker wire included
Cons
  • 4-ohm, 84.3dB load demands a beefy amplifier
  • 61Hz low end still leaves deep bass to a subwoofer
  • Modest 18-rating sample, so reception is thin
  • Plain looks next to premium bookshelf rivals

Monoprice Monolith B5 Bookshelf Speaker prices at every store

  • raptorsupplies.comNew

    In stock

    $149.99Checked 10 h ago
    Visit raptorsupplies.com
  • Monoprice.comNew

    In stock

    $157.62Checked 10 h ago
    Visit Monoprice.com
  • Neobits.comNew

    In stock

    $219.49Checked 10 h ago
    Visit Neobits.com
  • TargetNew

    Out of stock

    $167.31Checked 10 h ago
    Visit Target

Monoprice Monolith B5 Bookshelf Speaker price history

Lowest price we've seen: $149.99 on Nov 10 at raptorsupplies.com. Tracked across 4 stores since Nov 10.

What reviewers say

  • 4.1 / 518 ratings

Owners with 18 ratings average 4.1 out of 5 and mostly praise the sound for the money, especially the bass from such a small cabinet. Complaints center on the power needed to drive them and a slightly forward treble at high volume.

What people mention
  • BassPraisedOwners say the twin woofers deliver more low end than expected from a cabinet this small.
  • Amplifier powerCriticisedThe 4-ohm load and low sensitivity mean weak amps struggle and the speakers sound thin.
  • TrebleMixedThe silk dome is smooth at normal levels but some find it forward when pushed loud.
  • BuildPraisedBuyers describe the MDF cabinet as heavy and well finished for the price.
  • ValuePraisedReviewers repeatedly call them a strong alternative to pricier name-brand bookshelf speakers.

Specifications

Bluetooth
No
Connectivity Technology
Wired
Ports And Interfaces
5-way binding posts
Wi-Fi
No
Frequency Response
61Hz ~ 20kHz
Crossover Frequency
2.5 kHz
Amplifier Power
50 ~ 150 watts

Questions and answers

Do the Monolith B5 speakers need a subwoofer?
For movies, yes. They reach down to 61Hz, so a subwoofer fills in the deep bass and LFE channel. For music in a small room, many owners run them alone.
What amplifier works with 4-ohm, 84.3dB speakers?
Look for an amp rated for 4-ohm loads with at least 50 to 100 watts per channel. Receivers with weak 4-ohm ratings may shut down or sound strained.
Can I use them in a 5.1 setup?
Yes. They work as front or surround speakers in a 5.1 system, and the included wall brackets help with surround placement.
What comes in the box?
A pair of speakers, detachable grilles, wall-mount brackets and speaker wire. Speaker cable and an amplifier are not included.
How do they compare with the ELAC Debut B5.2?
The Monolith plays louder with more bass from its dual woofers, while the ELAC is easier to drive and more neutral. The Monolith suits home theater; the ELAC suits critical stereo listening.
Are they magnetically shielded?
Monoprice does not list magnetic shielding. Keep them a few inches from CRT TVs and sensitive gear.
Where is the Monoprice Monolith B5 Bookshelf Speaker cheapest?
At raptorsupplies.com, for $149.99, as of our latest check.
What do buyers say about the Monoprice Monolith B5 Bookshelf Speaker?
Rated 4.1 out of 5 from 18 ratings.
Where can I buy the Monoprice Monolith B5 Bookshelf Speaker?
4 stores we checked sell it, including raptorsupplies.com, Monoprice.com, Target, Neobits.com.

Stores we've priced the Monoprice Monolith B5 Bookshelf Speaker at

  • Monoprice.com deals and prices
  • Neobits.com deals and prices
  • Target deals and prices

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Speaker Placement
Bookshelf
Audio Configuration
5.1 home theater setup
Audio Highlights
Full crossover electronics
Audio Channels
Stereo
Driver Size
20mm (silk dome tweeter)
Driver Type
Woofer, Silk dome tweeter
Number Of Drivers
Two woofers, Single tweeter
Design Highlights
Detachable grilles
Material
MDF cabinet
Weight
9.5 lb
Depth
6.3 in (160 mm)
Height
13.6 in (345 mm)
Width
7.1 in (180 mm)
Nominal Impedance
4 ohms
Sensitivity
84.3dB (2.83V@1m)
System Components
Wall-mount brackets, Grilles, Speaker wires