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Bookshelf Speakers — PMC twenty5.21i

Description, images, technical data and specifications

PMC twenty5.21i
Image source — © PMC

The PMC twenty5 21i is a bookshelf two-way speaker, the most compact in the series. The case is only 34 cm high, but inside it is an acoustic maze with a length of 1 m 72 cm — a woofer rear radiation loading system known as the ATL new generation transmission line, which PMC uses in all its speakers.

Specifications

  • Model name

    twenty5.21i

  • Frequency Response low +/- 3dB (Hz)

    46

  • Frequency Response high +/- 3dB (Hz)

    25 000

  • Sensitivity (dB at 1 W/1m)

    86.5

  • Impedance (Ohms)

    8

  • Power amplifier requirements (W)

    25 - 150

  • Has internal amplification

    N/A

  • Internal amplification power (W)

    N/A

  • Size (sm)

    34.0 × 16.2 × 28.4

  • Weight (kg)

    6

  • Official link

    https://pmc-speakers.com/home-audio/twenty5i/twenty521i/

PMC ACTIVE twenty5.22i

PMC twenty5.22i

More components

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    The MB2 SE is a modern 3-way bookshelf speaker developed by PMC. The low-frequency spectrum of the signals is reproduced by a 310 mm woofer driver. The woofer operates in a 3-meter-long ATL transmission line.

  • twenty5.22i

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    The PMC twenty 5 i consists of a pair of two-lane and one three-lane floorboards, two two-lane shelving units and a central channel system. The crossovers are assembled on "military" fiberglass boards with pure copper tracks and are designed to provide improved band stitching.

  • ACTIVE twenty5.22i

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    The main advantage is Laminair Vent technology, developed through the study of Formula 1 cars and the past work in this area by Oliver Thomas, head of PMC. Laminair vents ensures smoothed air movement inside the speaker and when it exits through the port in the bottom, and, consequently, higher lowercase quality.

  • ACTIVE twenty5.21i

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    PMC ACTIVE twenty5.21i

    Structurally, the model is a two-way monitor with a section frequency of 1.8 kHz. High frequencies are reproduced by a tweeter with a soft dome with a diameter of 27 mm made of SONOLEX material, which is able to withstand a very high level of input signal due to the use of a cooling ferromagnetic liquid.

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