Monolith Audition B5 Review: Warm, Bass-Forward Bookshelf Sound

Introduction

The Monolith Audition B5 is a compact bookshelf speaker from Monoprice’s premium Monolith line, and it arrives with an appealing promise: a small cabinet that behaves like something much larger. Monolith sits at the top of Monoprice’s audio range, which places the Audition B5 in the good but affordable part of the market rather than the flagship end.

The cabinet is shoebox sized and weighs 7.3 pounds. It carries a 5.25-inch woofer and a small soft dome tweeter set into a waveguide, and it is rated at 4 ohms nominal with a published sensitivity of 84.3 dB. Pricing sits at about $125 per speaker, which works out to roughly $250 for a pair.

What follows is a practical look at how the speaker is built, how it behaves in a room, and whether the asking price makes sense for the sound you actually get.

Who This Product Is For

The Audition B5 suits listeners who want a small speaker with genuine low-end weight for everyday living-room duty: television, casual music listening, and long background sessions where a warm, full presentation matters more than forensic detail. It is a strong candidate for anyone who already owns an amplifier with real current delivery, because the low sensitivity means it needs some power to open up.

It is less suited to listeners chasing a neutral, detail-first monitor sound, and less suited to tight spaces where the speaker cannot sit at ear level with room to breathe behind it. Vertical placement matters more here than with many rivals, and the cabinet needs distance from the wall behind it.

Design and Build Quality

The cabinet is close in size to the Sony SS-CS5, slightly narrower and shorter while sharing a similar depth. The woofer is a 5.25-inch unit with a paper-like cone and a broad surround. The rubber ring that covers the mounting hardware is a familiar signal of a more affordable design tier, and the same approach appears on Polk’s XT series.

The tweeter is a 20 mm soft dome, and it sits behind a well-shaped waveguide that helps the speaker spread sound widely across the room rather than firing it in a narrow beam.

The wrap is a textured wood grain finish, and it is applied carefully here, with seams that are hard to spot. Rubber bumpers on the base keep the cabinet from marking shelves, stands, or a console. Around the back there is a port with a plastic flange, and the binding posts are consistent with the price class. Impedance is marked as 4 ohms nominal.

Sound Quality and Placement

The defining characteristic of the Audition B5 is low-end presence. This is not a bright speaker. Its voicing leans into the lower mid-range, and the result is a presentation that sounds considerably larger than the cabinet suggests, in the spirit of the PSB Imagine XB.

Horizontal dispersion is wide, so imaging and sound stage come together easily without fussy setup. Vertical behaviour is the opposite: the tweeter needs to sit at ear level or slightly above, and once your ears rise above it, mid-range and top-end detail fall away quickly. Choosing the right stand height is not optional if you want that detail back.

Placement distance matters too. Because the low end is so generous, the speaker wants roughly two feet of clearance from the wall behind it. Pushed close to a wall, the sound becomes muffled. Even set up well, a degree of box resonance is audible, and the bass emphasis can mask mid-range detail that would otherwise come through.

What does come through is a top end that sounds natural rather than harsh once the speaker is positioned properly. Published specifications list a frequency response of 61 Hz to 20 kHz and sensitivity of 84.3 dB. That sensitivity figure is the reason the speaker benefits from an amplifier with headroom, and a capable integrated amp drove it without strain.

Main Strengths

The first strength is scale. Very few speakers this size deliver the weight and body that the Audition B5 manages in the lower registers, and for television and relaxed listening that fullness is genuinely enjoyable.

Imaging and sound stage are the second. The waveguide does its job, and the wide horizontal dispersion means the speaker does not demand a laser-aligned listening position to produce a convincing image.

The third is tonal comfort. The top end is natural and easy to live with across long sessions, which pairs well with the warm overall balance. Build quality also deserves credit at this level, particularly the neatly applied wrap and the rubber feet that protect whatever surface you set the speaker on.

Things to Consider Before Buying

Efficiency is the biggest practical consideration. At 84.3 dB and 4 ohms nominal, the Audition B5 asks more of an amplifier than most small bookshelf speakers, and a low-powered amp will leave it sounding flat and constrained.

Setup sensitivity is the second. The tweeter axis is narrow vertically, so the speaker needs stands that place the tweeter at or slightly above ear level, and it needs about two feet of space behind it. Neither requirement is unusual for a rear-ported design, but both are more consequential here than on many rivals.

Third, the low-end emphasis comes with a cost. Boomy bass and some cabinet resonance can blur mid-range detail, and the speaker never sounds truly neutral. Listeners who want precision should weigh that against the extra weight on offer.

Finally, there is the price relative to the build. At roughly $250 a pair, the Audition B5 competes with well-regarded options such as the ELAC B5.2 and the Polk ES15, the latter often discounted. Judged purely on cabinet and driver construction, the asking price sits above what the parts suggest, which makes a sale price far more attractive than list.

Buying Advice

The Audition B5 makes sense for a specific buyer: someone with a capable amplifier, stands at the right height, and enough space to keep the speakers clear of the wall, who wants a small speaker with real bass weight for television and relaxed listening. In that setup it is an enjoyable, easy-going speaker.

Buyers who want neutrality, sharp mid-range detail, or the best possible finish for the money should compare carefully at the same pair price. The ELAC B5.2 and the Polk ES15 occupy the same bracket, and the Polk in particular has the edge on finish. Anyone shopping the Audition B5 should also watch for discounts, because the value case improves considerably below list price.

If a matching center channel is part of the plan, the Monolith center shares the same character: slightly chesty with vocals, but it never sounds strained once it is aimed correctly toward the listening position.

Conclusion

The Monolith Audition B5 is a warm, bass-forward compact speaker that sounds bigger than it looks and rewards careful setup. Its strengths are real: generous low end, dependable imaging, a natural top end, and a neatly finished cabinet. Its compromises are equally real: low sensitivity, a narrow vertical sweet spot, a need for breathing room behind the cabinet, and a price that sits above what the build suggests.

For the right room and the right amplifier, it is a satisfying small speaker that makes everyday listening easy. For buyers who want maximum refinement per dollar, the alternatives in the same bracket deserve a serious look before you commit.