Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
What are hifi reviews useful for? (1) Identifying products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've heard (this means they probably are legitimately great). (3) Identifying a product's attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we often discount what reviewers say because they heap praise on most products—and are often apprehensive about publishing strong criticism or comparisons between products. Further, they seldom have more than a few products on-hand, often relying on their memories to compare past products. Always listen for yourself.
All
QB1-A
reviews
Video Review
Manufacturer details
Features
Specifications
- Frequency Response: 20Hz-25kHz
- Sensitivity: Adjustable +4 to +20dBu
- Effective ATL™ Length: 2.7m (8.9ft)
- Impedance: Input Impedance 20k Bal
- Peak SPL: 132dB @1metre
- Drive Units: LF 4 x PMC carbon fibre/Nomex 250mm/10" piston driver, MF PMC hand-built 75mm soft dome driver, HF PMC 34mm soft dome tweeter with acoustic radiator
- Crossover Frequency: 380Hz & 3.8kHz
- Input Connectors: I/O - Balanced analogue input, digital AES3 input - Digital Input - AES3, 96kHz 24bit
- Amplifier Power per Channel: LF 2 x 2400Wrms, MF 1 x 550Wrms, HF 1 x 275Wrms
- Dimensions: H 820mm (32.2") W 1092mm (42.9") D 523mm (20.6") (max depth)
- Weight: 150kg (330lbs)
Description
Introducing the QB1-A,: PMC's newest large-scale studio monitor design, and a bold statement of the state of the art, the result of extensive customer research and innovative driver performance analyses based on opto-acoustic laser interferometry.
Introducing the QB1-A,: PMC's newest large-scale studio monitor design, and a bold statement of the state of the art, the result of extensive customer research and innovative driver performance analyses based on opto-acoustic laser interferometry. This is a Class-D active ATL™ speaker with analogue and digital inputs, featuring exceptional electro-mechanical engineering finessed by DSP control, and immense headroom (4825W per channel) wedded to pinpoint dynamics for unparalleled speed, depth, accuracy and power.
With a maximum SPL of 132dB at one metre and a quartet of 10-inch carbon fibre/Nomex® piston bass drivers, the QB1-A can certainly produce level — but not at the expense of accuracy or increased distortion. The cutting-edge on-board DSP provides driver unit optimisation, EQ and sophisticated crossover networks, while the wired RJ45 desktop control provides user-friendly access to user EQ settings via its backlit display and jog wheel, with the ability to store up to four user setup presets.
Even the physical dimensions have been carefully considered: at 1092 x 820 x 520 millimetres (WHD), the QB1-A will retrofit into almost all existing studio soffits. Thanks to its ATL™ design, free-standing use has no impact on its effortlessly smooth bass response. Whether soffit-mounted or not, the QB1-A delivers the transparency, resolution, extended frequency response and wide...
With a maximum SPL of 132dB at one metre and a quartet of 10-inch carbon fibre/Nomex® piston bass drivers, the QB1-A can certainly produce level — but not at the expense of accuracy or increased distortion. The cutting-edge on-board DSP provides driver unit optimisation, EQ and sophisticated crossover networks, while the wired RJ45 desktop control provides user-friendly access to user EQ settings via its backlit display and jog wheel, with the ability to store up to four user setup presets.
Even the physical dimensions have been carefully considered: at 1092 x 820 x 520 millimetres (WHD), the QB1-A will retrofit into almost all existing studio soffits. Thanks to its ATL™ design, free-standing use has no impact on its effortlessly smooth bass response. Whether soffit-mounted or not, the QB1-A delivers the transparency, resolution, extended frequency response and wide...
Release Timeline
Manufacturer Site
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- PMC leverages its professional studio monitor expertise to create hifi speakers, resulting in accurate and detailed sound reproduction at home.
- The brand utilizes Advanced Transmission Line (ATL) technology in their speaker designs, producing tight, extended, and well-balanced bass.
- They pay significant attention to minimizing cabinet vibrations through decoupled designs, mass damping, and plinth stands to improve imaging and overall clarity.
Select products
Select product comparisons
Prodigy5:
- Positioning: A compact floor-standing speaker designed for versatility in various room sizes.
- Description: Offers a dynamic sound experience with its Advanced Transmission Line and twin Laminair vents, making it ideal for small to medium rooms. Compared to the larger models like the twenty5.26i, it provides a more affordable option without compromising on the clarity and depth of sound. Its compact design makes it suitable for those with limited space and a moderate budget, while still delivering a powerful audio performance.
Active twenty5.24i:
- Positioning:The largest two-way speaker in the active twenty5i series, designed for high-resolution audio.
- Description: This model combines active technology with PMC's ATL to deliver precise and dynamic sound, perfect for larger rooms. Unlike the passive models such as the Prodigy5, the active design allows for optimized internal amplification, providing a more integrated and space-efficient solution.
Prophecy9:
- Positioning: The flagship model of the Prophecy series, offering state-of-the-art performance.
- Description: Featuring PMC's LaminairX technology, delivers an expansive soundstage and deep bass, ideal for large rooms and high-end audio setups. It surpasses models like the twenty5.26i in terms of technological sophistication and sound dynamics.
Fenestria:
- Positioning: The top-of-the-range model in the Fact series, designed for the ultimate listening experience.
- Description: With vibration-cancelling design and advanced materials, offers exceptional sound purity. It stands out from other models like the Prophecy9 with its innovative cabinet and driver technologies, providing an immersive audio experience.
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Avg. Product Price
$100,001+
Used For Sale
65
Available (Scroll Down)
Brand Popularity
58
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
57
Founding Year
1991
Our take on the brand
PMC is a hifi speaker brand known for its Advanced Transmission Line (ATL) technology, which enhances bass response and reduces distortion, and its LaminairX technology in the Prophecy series, which reduces turbulence and harmonic distortion by up to 3dB. Their active speakers are preferred by music and audio professionals for their tonal accuracy and dynamic range, with user reviews particularly praising their accurate midrange and detailed sound compared to brands like Dynaudio and B&W.
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