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ELAC Line 300 BS312.2 4.5" specifications and in-depth review

ELAC Line 300 BS312.2 4.5"

Manufacturer: ELAC

The ELAC Line 300 BS312.2 is a compact bookshelf speaker designed for passive operation in home audio setups. Built around a 2-way driver layout, it houses a 4.5″ woofer within a bass reflex enclosure that measures 123 mm wide, 282 mm tall, and 208 mm deep. Each unit weighs 7.2 kg, and the speaker comes backed by a 3-year warranty.

On the technical side, the BS312.2 covers a wide frequency range, reaching down to 42 Hz at the low end and extending up to 50,000 Hz at the top. It operates at a nominal impedance of 4 Ω and is rated to handle up to 150 W of peak input power, placing it in a range suitable for a variety of amplifier pairings in a home listening environment.

Pros
  • Exceptionally wide frequency response extending up to 50,000 Hz, well beyond the standard audible range
  • Handles up to 150 W of peak input power, allowing use with a broad range of amplifiers
  • Bass reflex enclosure design supports lower frequency reproduction, with the lowest frequency reaching down to 42 Hz
  • Compact bookshelf form factor fits easily into most room setups without requiring dedicated floor space
  • Comes with a 3-year warranty, offering a reasonable period of manufacturer coverage
Cons
  • 4 Ω nominal impedance may not be compatible with all amplifiers without careful matching
  • The 4.5″ woofer is relatively small, which can limit bass output at higher volumes
  • Not wall-mountable, restricting placement flexibility to surfaces such as shelves or stands
  • At 7.2 kg per unit, the speakers are fairly heavy for their size, which can complicate placement and repositioning
Who is this for?

These speakers are a natural fit for listeners setting up a dedicated bookshelf or desktop listening environment where space is limited but audio range matters. The wide frequency response extending to 50,000 Hz makes them well-suited for those who value extended high-frequency detail, while the bass reflex enclosure reaching down to 42 Hz provides a reasonable low-end foundation for a speaker of this size. Users pairing them with a capable amplifier that handles 4 Ω loads comfortably will get the most out of their 150 W peak power handling in a typical home audio setup.

Who is this NOT for?

These speakers are not a good match for users who need flexible wall-mounted placement, as this configuration is not supported. Their 4 Ω nominal impedance can also be problematic for listeners using entry-level receivers or amplifiers not rated for low-impedance loads. Additionally, those looking for deep, room-filling bass from the speaker alone may find the 4.5″ woofer limiting, particularly in larger listening rooms where a bigger driver or a dedicated subwoofer would be more appropriate.

General info:

Speaker type Passive
Driver layout 2-way
Form factor Bookshelf
Enclosure type Bass reflex (ported)
Weight 7.2 & 7.2 kg
are wall-mountable ✕
volume 7214.688 cm³
width 123 mm
height 282 mm
thickness 208 mm
warranty period 3 years

The ELAC Line 300 BS312.2 is a passive, 2-way bookshelf speaker built around a bass reflex (ported) enclosure, giving it a compact yet structured physical profile. It measures 123 mm wide, 282 mm tall, and 208 mm deep, with an internal volume of 7,214.688 cm³. Each unit weighs 7.2 kg, and the speaker is not wall-mountable. It carries a 3-year warranty.

Specifications:

Main driver/woofer size 4.5"
lowest frequency 42 Hz
highest frequency 50000 Hz
Nominal impedence 4 Ω
Maximum power (peak) 150 W

The speaker is built around a 4.5″ main woofer and covers a frequency range from 42 Hz at the low end up to 50,000 Hz at the top. It operates at a nominal impedance of 4 Ω and can handle a peak input power of 150 W.

Features:

Final Verdict

The ELAC Line 300 BS312.2 is a compact passive bookshelf speaker that makes a coherent case for itself through a combination of a remarkably wide frequency response stretching to 50,000 Hz and a bass reflex design that extends usable low-end reproduction down to 42 Hz — a solid range for a speaker of its physical dimensions. Its 150 W peak power handling and 3-year warranty add practical reassurance, though prospective users should ensure their amplifier is rated for a 4 Ω load and understand that the 4.5″ woofer has inherent physical limits in larger spaces. For listeners building a considered bookshelf or near-field home audio setup with a compatible amplifier, the BS312.2 represents a technically well-specified option within its form factor.