Unitra ZGB-401 Bookshelf Speaker Set (Linen and American Walnut)

ZGB-401 Bookshelf Speaker Set: Modern Sound with Timeless Design

The ZGB-401 Bookshelf Speaker Set by Unitra offers an exquisite blend of modern sound engineering and timeless craftsmanship, perfectly suited for audiophiles seeking both high-fidelity audio performance and elegant aesthetics. Designed with a bass-reflex construction and carefully selected transducers, this 2-way speaker system delivers rich, dynamic sound across a wide frequency range, ensuring a linear response that faithfully reproduces any musical material.

Refined Bass-Reflex Design for Versatile Acoustics

The ZGB-401 features a bass-reflex enclosure that enhances the lower frequency output, producing deep, accurate bass without distortion. A 6-inch aluminium-ceramic midwoofer handles the low-midrange frequencies, providing excellent rigidity and lightness, which reduces distortion and improves sound precision. The aluminium-magnesium dome tweeter ensures crisp, detailed highs, extending the frequency response up to 23kHz, allowing for an expansive soundstage with impressive clarity.

For environments where a sealed enclosure may perform better, the included bass-reflex port plug allows the system to be converted into a closed-box configuration. This flexibility makes the ZGB-401 adaptable to different room acoustics and placement, offering superb performance whether in small rooms or larger, more open spaces.

Advanced 3rd-Order Crossover for Optimal Sound Balance

The 3rd-order passive crossover in the ZGB-401 ensures that the audio signal is optimally divided between the woofer and tweeter, allowing each to perform at its best. This advanced crossover design eliminates unwanted interference between the drivers, ensuring a balanced and accurate sound profile. With crossover frequencies set at 2.4kHz, the transition between the midrange and high frequencies is seamless, resulting in a smooth and coherent audio experience.

High-quality components, such as air coils and metalized polypropylene capacitors, are used throughout the crossover, ensuring a linear transfer characteristic with minimal distortion. These components prevent harshness in the high frequencies, creating a natural sound that brings out the details in recordings without exaggerating any part of the frequency spectrum.

Superior Build Quality with Dual-Layer MDF and Natural Materials

The double-box design of the ZGB-401 is based on an innovative "box-in-box" structure, which provides superior rigidity and reduces unwanted vibrations. Weighing over 10.5 kg per speaker, the robust build minimises enclosure resonances, enhancing sound quality by allowing the drivers to operate without interference from cabinet vibrations. The dual-layer MDF construction (3/4" total thickness) ensures that the speakers remain solid and stable, even at high volume levels.

The speakers are finished in natural materials, with options for real wood veneer in Black Ash or American Walnut, adding a touch of luxury to their appearance. For an even more classic look, the grilles are available in black acoustic fabric or Polish linen, offering both aesthetic variety and acoustic transparency.

Smooth Impedance and Amplifier Compatibility

The ZGB-401 boasts a smooth impedance characteristic with a nominal impedance of 4 ohms and a minimum of 3.5 ohms, making it compatible with a wide range of amplifiers. This impedance profile ensures that even amplifiers sensitive to load changes can drive the ZGB-401 without strain, offering consistent performance across different systems.

Additionally, the dual binding posts support bi-wiring and bi-amping, providing advanced users the option to customise their setup for even better control over the speaker's frequency response and dynamic range.

Compact Yet Powerful Performance

Measuring 380 x 210 x 280 mm, the ZGB-401 speakers offer a compact form factor without compromising on sound quality. Despite their size, they deliver powerful output with a 60W RMS power rating and a sensitivity of 87 dB, making them ideal for both near-field listening and larger spaces. The frequency response of 60Hz to 23kHz ensures that the speakers can handle a wide range of musical genres, from bass-heavy tracks to delicate high-frequency details.

The ZGB-401 Bookshelf Speaker Set is designed for discerning listeners who value sound precision and aesthetic excellence. Whether paired with a high-end amplifier or used as part of a more modest audio setup, these speakers bring music to life with a natural, immersive sound that transcends their bookshelf size.