PMC IB2S
Image source — © PMC
Model name
IB2S
Frequency Response low +/- 3dB (Hz)
25
Frequency Response high +/- 3dB (Hz)
25 000
Sensitivity (dB at 1 W/1m)
89
Impedance (Ohms)
4
Power amplifier requirements (W)
120 - 500
Has internal amplification
N/A
Internal amplification power (W)
N/A
Size (sm)
74.0 × 33.0 × 46.5
Weight (kg)
41
Official link
The PMC BB5 SE bookshelf speaker is equipped with a specially designed proprietary midrange driver, a 15-inch woofer, and one 27mm tweeter with a soft dome made of SONOLEX material.
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.
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.
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.
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.