Полочная акустика — PMC IB2S

The IB2S is a bookshelf speaker from PMC, built with a demanding 4 ohm nominal impedance and considerable power requirement. PMC's transmission-line-influenced engineering runs throughout this model, which sits at a serious scale for the bookshelf category, closer in ambition to a compact floorstander than a conventional stand-mount design.

Key specs that matter

Rated response is 25 Hz to 25 000 Hz, an unusually deep low-end figure for the bookshelf category. Sensitivity is 89 dB into 4 ohms with a demanding 120-500 W recommended window. At 74.0 x 33.0 x 46.5 cm and 41 kg it is an exceptionally large, heavy bookshelf cabinet, considerably larger than most conventional stand-mount speakers despite its nominal bookshelf classification.

Sound and use context

Expect a full-range, high-headroom presentation with deep bass extension unusual for the bookshelf category, consistent with PMC's transmission-line engineering approach - a serious performer that essentially competes with compact floorstanders on scale and bass authority despite its stand-mount classification.

Pairing

The 4 ohm load and demanding 120-500 W window call for a powerful amplifier with real current delivery, worth confirming against whatever amplifier is already owned or planned for the system before committing to this substantial cabinet.

Alternatives

PMC's twenty5.22i sits at a more modest scale within the brand's bookshelf catalogue for a considerably less demanding amplifier requirement, worth comparing directly if this model's exceptional 41 kg weight and demanding power window exceed what a specific room and system can comfortably provide. PMC extensive dealer network makes arranging a direct comparison against the more accessible twenty5.22i practical, helping clarify exactly how much additional bass scale and headroom this considerably larger and heavier cabinet buys for a specific room. Given the demanding 4 ohm load and substantial power window, a dealer conversation about specific amplifier recommendations is well worth having before committing to a purchase at this level. Overall this remains a serious bookshelf choice within PMC transmission-line engineering catalogue. A rigid, well-positioned stand at seated ear height remains essential given this cabinet exceptional mass. Toe-in adjustment at the listening seat remains a free, worthwhile tweak once placement is finalised.