PMC Twenty5i ACTIVE Upgrade Kit

£1,795.00 inc. VAT

Trade-in available.

Make your twenty5 and twenty5i loudspeakers active with this simple-to-install Twenty5i ACTIVE Upgrade Kit, from PMC.

Existing owners of two-way twenty5 and twenty5i speakers (21, 22, 23 & 24) can now add all the benefits of built-in amplification, with higher resolution, control, and transparency.

Available as a kit, in silver finish, for a pair of loudspeakers.



* Usually ships within 1-3 business days. See exceptions



Twenty5i Active Upgrade Kit

This upgrade kit brings a new active crossover and matched amplification for the speakers’ treble and mid/bass sections, delivering 100W to each driver for greater detail, effortless power, crisp transients, and wider-ranging dynamics. An active loudspeaker system also allows for a more minimal hi-fi set-up now that separate power amplification isn’t required.

Simply connect the speaker using standard RCA interconnects or balanced XLRs to a wide range of one box streamers, players, or preamps, for a system that’s more compact and elegant – not to mention capable of even higher quality.

Easy Installation

This Active twenty5 upgrade pack is an easy-install module, simply replacing the backplate of your speaker with a complete input/crossover/amplification unit that connects to the speaker’s drivers with a single multipin plug.

The job is straightforward, each module taking no more than five minutes to install – or you can ask the team here at Unilet Sound & Vision to do it for you – and the Active twenty5 module has a convenient speaker selector: Simply plug in the jumper bar supplied to select the model you are upgrading.

The meticulously designed analogue crossover in the upgrade module has unique settings for each of the four speaker models, perfectly tuned to guarantee ideal driver integration and an exceptionally pure, natural, and powerful sound. Then you simply connect your signal cable and mains lead to each speaker, and you’re ready to reap the benefits of an active loudspeaker system.

Active Advantages

Active amplification of a loudspeaker allows superior control of the drive units and helps dampen unwanted resonances, improving transient performance and reducing colouration, increasing resolution and detail.

Few speaker manufacturers can design great amplifiers, and few amplifier specialists can design great speakers. PMC have been making the world’s leading Hi-Fi and professional-use speakers for over 30 years, and from the start, their studio speakers – used to create much of the music and movies you love – have been built around their own active crossovers and amplification, ideally matched to their high-precision drive units.

Now that active advantage is available for the PMC twenty5 and PMC twenty5i series domestic speakers, bringing your listening at home ever closer to what was heard when the recording was captured in the studio.


  • Active upgrade for two-way PMC Twenty5 / Twenty5i Loudspeakers
  • 2 x 100 Watts of high-resolution power amplification.
  • Crossover included.
  • Simple installation.
  • Model selector multi-pin plug for easy speaker model settings selection.


  • Frequency Response: 46 Hz – 25 kHz
  • Crossover Frequency: 1.65 kHz
  • Input Connectors: Balanced analogue XLR, unbalanced RCA
  • Amplifiers: HF 100 W rms + LF 100 W rms
  • Gain / Sensitivity:
    • 1 V rms = 96.5 dB SPL @ 1 m (low setting)
    • 1 V rms = 106.5 dB SPL @ 1 m (high setting)
  • Input Impedance: >14 kΩ
  • Mains Power: 90-260 V, IEC C14 Connector.


  • 2 x Active Power Amplification / Crossover Circuit Boards.
  • 2 x Mains Power Cables.
  • 1 x Multipin Model Selector Plug.
  • 1 x Allen Key.
  • 12 x Mounting Bolts.

Full PMC Range Available

Unilet Sound & Vision are official retail partners for PMC Loudspeakers, providing sales, advice and assistance on their entire range of high-quality audio products. Please do get in touch if you would like a demonstration or wish to purchase.

More Information

Additional information



Purchase Options

Home Delivery, Click & Collect, Trade-In Available



The Professional Monitor Company was founded in 1991 by Peter Thomas of the BBC and Adrian Loader of FWO Bauch.

Their combination of knowledge and a life-long passion for music led to the production of PMC’s first product, which was snapped up by BBC Maida Vale Studios and Metropolis Mastering and has remained the world’s reference ever since. PMC are one of the very few companies who have been awarded an Emmy for their contribution to recording excellence., and the company reigns supreme throughout the leading mastering houses, broadcasters and much of the professional world.

PMC believe a good loudspeaker should be able to relay the purest intentions of the artist without colouration – The ideal solution for both studio & home.

PMC | Unilet Sound & Vision


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