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PMC TWENTY5.21i Bookshelf/Standmount Speakers

by PMC
SKU 75371
Original price £2,575.00 - Original price £2,575.00
Original price
£2,575.00 - £2,575.00
Current price £2,575.00

Color: Oak

PMC TWENTY5.21i Bookshelf/Standmount Speakers: Big Sound in a Compact Package

Don't let the compact size of the PMC TWENTY5.21i fool you; these bookshelf/standmount speakers deliver a big, impactful sound that defies their smaller cabinet. PMC, known for their Advanced Transmission Line (ATL) technology, has once again demonstrated their prowess in audio engineering. The TWENTY5.21i is perfect for small-to-medium listening spaces where space is a premium, yet a desire for detailed bass, ultra-realistic midrange, and delicate highs with maximum musicality prevails. These speakers shine whether placed on stands or bookshelves, offering flexibility in placement and excelling as effects speakers in immersive sound systems.

Enhanced Sound Quality

The PMC TWENTY5.21i is designed to provide greater detail, a more natural sound, and exceptional clarity at any volume level. Despite its smaller cabinet, it delivers deeper bass, thanks to PMC's ATL bass-loading technology. This technology intelligently harnesses the energy generated by the bass unit, surpassing traditional speaker designs based on ported or sealed boxes.

Laminair™ Technology: Engineering Excellence

PMC's Laminair™ aerodynamic vent represents a pinnacle in audio performance, drawing from principles used in high-performance engineering, including Formula 1 and Le Mans. By applying ATL aerodynamic principles, it creates a smoother, laminar airflow at the exit of the transmission line.

ATL designs involve high-speed air movement under pressure. Reducing turbulence and drag at the ATL vent enhances efficiency, eliminates air noise, and provides bass with impeccable timing and an extensive dynamic range. The combination of ATL and Laminair elevates audio quality to unparalleled heights:

  • Faster, Cleaner Bass: Enjoy bass that's not only deeper but also cleaner and faster, enriching your listening experience.
  • Higher Definition Sound: The elimination of turbulence enhances the overall sound definition and detail.
  • Noise-Free Audio: Say goodbye to air noise—only pure, undisturbed music remains.
  • Maximum Output and Dynamics: Experience higher maximum output and bass with supreme timing and dynamics.


Please Note: Stands are not included and can be purchased separately.

This item is available for collection in-store only!

  • Exceptional Sound: These speakers deliver a weighty and crisply defined sound, thanks to PMC's transmission line design, PMC-designed drivers, and a high-quality crossover.
  • PMC-Designed Drivers: Featuring a 133mm bass unit with a natural fibre cone and a 27mm soft dome tweeter, these speakers ensure powerful and accurate bass response and wide high-frequency dispersion.
  • Transmission Line Design: PMC's transmission line design enhances bass performance, minimizes distortion, and extends bass response as low as 35Hz, while high frequencies reach up to 25 kHz.
  • Expert Crossover: The speakers feature a well-designed crossover with a frequency of 1.7kHz, ensuring uncompromised performance and preventing low frequencies from reaching the tweeter.
  • PMC Quality: PMC is known for its premium high-end speakers, and the Prodigy range combines affordability with exceptional sound quality.
  • Amplifier Compatibility: These speakers are forgiving in terms of amplifier compatibility, making them accessible to a wide range of audiophiles.
  • Customization: Optional grilles are available separately, allowing you to customize the appearance of your Prodigy5 Speakers to match your preferences.

Available FinishesWalnut, Diamond Black, Oak
Crossover Frequency1.7kHz
H 340mm (13.4”) x W 162mm (6.4”) x D 284mm (11.2”) incl. binding posts (+9mm grille)
Drive Units
LF PMC 5.5”/140mm long-throw g-weave™ cone with cast alloy chassis

HF PMC/SEAS®, 19mm twenty5i series, SONOMEX™ fabric soft dome, Ferrofluid cooled, with 34mm surround and dispersion grille
Effective ATL™ Length1.72m (5.6ft)
Frequency Response46Hz - 25kHz
Impedance8 Ohm
Input ConnectorsOne pair of 4mm binding posts
Sensitivity86.5dB 1W 1m
Recommended Amp Power25 - 150W
Recommended Drive Unit Torque Settings
HF: 0.6Nm

LF: 0.75Nm
Weight6kg (13.2 lbs each)

Delivery is made by common carrier next working day. Delivery is FREE for orders in-stock and over £100 or £9.99 for orders less than £100 or special delivery items.

Statutory Cancellation Right

You have the statutory right to cancel your order for any reason within 14 days beginning with the day you receive the item (please see clause 2 of our Conditions of Sale for the full instructions on cancellation and further information on your right of cancellation). We only accept cancellations via phone - 0115 975 8613, email - or post - Superfi Returns, DB House, Rani Drive, Nottingham, NG5 1RF, United Kingdom.

Our Voluntary Returns Policy

As well as your statutory cancellation rights described above, you can return most products within 30 days of receipt of the products if the products are complete and are in an unused and undamaged condition. We only accept returns via phone - 0115 975 8613 or post - Superfi Returns, DB House, Rani Drive, Nottingham, NG5 1RF, United Kingdom.

Please note that this returns policy doesn't affect your statutory rights and therefore doesn't affect your right of cancellation as described above.

Please note that you must return each item in the same condition in which you received it. This means that new items must be returned new, unused and complete (including all accessories). Refunds for returned items that are not received in this condition, may be reduced.

Need Help?

Call us on 0115 975 8613

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