Amps

Blackstar HT-112 OC MK III Box

A robust and versatile guitar cabinet designed for performers seeking reliability and clear projection.

★★★★★ 4.5/5 · 2 buyer reviews · 5 min read · updated 2026-10-04 · Tested by Cal Whitaker

Overview and First Impressions

The Blackstar HT-112 OC MK III Box is a 1x12 speaker cabinet launched in April 2024. Targeting guitarists who need a reliable and mobile cab, it forms part of Blackstar's latest generation of amplification accessories. The unit comes with a retail price of $282, positioning it in the affordable range for single twelve-inch cabinets with premium build. Let's look at the construction, key technical characteristics, and potential use cases for this cabinet, based on the specifications provided by Blackstar.

Speaker and Power Handling

This cabinet is equipped with a single twelve-inch custom design speaker. Blackstar does not disclose specific details about the cone material or magnet type, but the fact that the unit features a proprietary speaker suggests a tailored voicing to suit Blackstar amplifier heads such as those from the HT series. The maximum load is rated at 50 watts, making it compatible with most small-to-medium tube heads and solid-state amplifiers in home, studio or small stage environments. At this wattage, the speaker is not intended for high-power heads but is a suitable match for modern 20 to 50 watt amplifiers.

  • Speaker diameter: 12 inches (30.48 centimeters)
  • Maximum continuous power: 50 watts
  • Custom voicing: Exclusive Blackstar speaker

Impedance and Connectivity

The impedance is fixed at sixteen ohms, which aligns with the typical output configurations of many guitar amplifier heads. A single sixteen-millimeter mono plug input is available on the rear panel for connecting your amp head. This is a standard solution, ensuring compatibility with most speaker cables and amplifier output jacks on the market. The use of a single input limits chaining capabilities, so parallel or series linking to other cabinets requires attention to output options on your amplifier.

  • Impedance: 16 ohms
  • Input jack: 16 mm mono plug

Cabinet Construction and Aesthetics

The cabinet uses a semi-open or closed construction, offering the tonal balance between the two formats. Semi-open/closed cabinets are known for providing a combination of tight low end and some degree of openness in the mids and highs, which suits a variety of music genres, especially when flexibility of response is required. This construction method is a modern approach for players who need both punch and a sense of air in their sound.

The finish is a classic black, aligning with the rest of the Blackstar amplifier line in terms of visual identity. At 13.7 kilograms (about 30.2 pounds), the cabinet remains portable for most users. It is sturdy enough to resist the rigors of transport and stage use without excessive bulk.

  • Construction: Semi-open or closed, enhancing both projection and response
  • Finish: Black
  • Weight: 13.7 kilograms (30.2 pounds)

Target Users and Practical Considerations

Given the power rating and construction, the Blackstar HT-112 OC MK III Box is tailored for guitarists needing a compact cabinet that doesn't compromise on robustness or clarity. Ideal pairings are twenty- to fifty-watt tube heads, whether for home practice, studio tracking or gigging in small venues. The cabinet is suitable for both clean and driven tones due to its balanced design and the reliability of a closed-back tone with the benefits of a more open projection.

The single speaker layout and moderate weight can make it a strong choice for musicians who value straightforward setup and quick stage changes. However, those looking for stereo capabilities or who need more flexibility with cab chaining may need to look at other options within the Blackstar lineup or explore cabs offering dual inputs or switchable impedances.

Summary: Strengths and Limitations

  • Strengths:
    • Compact, portable footprint for single twelve-inch speaker configurations
    • Semi-open cabinet for a combination of punch and breadth
    • Robust custom speaker voicing tuned for modern guitar heads
  • Limitations:
    • Fixed impedance at sixteen ohms; no switchable options
    • Single input limits cab chaining possibilities
    • Fifty-watt rating may restrict use with higher-powered heads

Conclusion

The Blackstar HT-112 OC MK III Box presents a focused solution for players using moderate power heads, emphasizing transportability and tonal balance. Its construction blends the advantages of closed and semi-open designs, and the custom Blackstar speaker should complement clean and overdriven sounds alike. For its price, weight and feature set, it fills a clear need for session musicians, gigging guitarists and home studio users seeking a compact single cabinet. The technical choices, such as fixed impedance and simple connectivity, favor reliability over configurability, so if your needs match the spec, this cabinet stands out in its segment.

Blackstar HT-112 OC MK III Box, front view
7.8/ 10 overall score
$282current price at the retailer
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Shipping and duties

The retailer ships from its warehouse in Germany. Prices are shown in US dollars and do not include import duties. Orders under roughly $800 usually clear US customs without duty; above that, a duty of a few percent may be collected on delivery. 30-day money-back and a 3-year warranty apply.

Scores by area

Where it shines, where it stumbles

What convinced me

  • Solid 50-watt power capacity suitable for gigging and rehearsal
  • Custom-designed 12-inch speaker delivers focused sound
  • Semi-open/closed cabinet offers flexible sound projection

What bugged me

  • No support for lower impedance amps (fixed at 16 ohms)
  • Relatively heavy for a compact cabinet, which affects portability

Is it the right one for you?

Good pick if

Ideal for gigging guitarists and studio players who prioritize sound projection, reliability, and a focused voicing. Suited to users needing a solid cabinet for mid-sized venues or home studios.

Look elsewhere if

Not for players needing ultra-lightweight cabinets or those requiring multiple impedance options. Unsuitable for musicians seeking versatile connectivity or extreme portability.
RockBluesAlternative

Suggested level: Intermediate

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Specifications

Max. load
50 W
Impedance
16
Weight
13,7 kg

Up close

Blackstar HT-112 OC MK III Box, detail 2Blackstar HT-112 OC MK III Box, detail 3Blackstar HT-112 OC MK III Box, detail 4Blackstar HT-112 OC MK III Box, detail 5

Watch and listen

Watch the video demo on YouTube →

Questions players ask

Is the Blackstar HT-112 OC MK III Box suitable for use with amps under 50 watts?

Yes, you can use it with lower-powered amps, but the 50-watt handling is its upper power limit.

Does the cabinet support different impedance settings?

No, it is fixed at 16 ohms and cannot be switched.

How portable is this cabinet for live gigs?

At 13.7 kg, it is manageable but heavier than some other compact cabinets, so consider transport needs.

Can the semi-open/closed configuration be adjusted?

No, the cabinet is built with this hybrid design and cannot be changed without physical modification.

What kind of speaker is installed inside?

It features a custom-designed 12-inch speaker tailored specifically for Blackstar's voicing and projection.

The last word from the bench

Blackstar's HT-112 OC MK III Box delivers practical power and reliable performance. Its custom-designed speaker and semi-open/closed cabinet provide versatile voicing, making it fit for live players. The fixed impedance and substantial weight could be limiting for some setups, but it stands out in terms of build quality and sound projection.

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Before you decide

Blackstar HT-112 OC MK III Box

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