Poland

Unitra was a Polish manufacturer of consumer electronics, specializing in audio equipment such as radios, tape recorders, and amplifiers.

Unitra

file

The ZGZ-801 is a standout closed-box, high-efficiency speaker system, meticulously crafted to deliver top-notch audio performance in a 75-liter sealed enclosure. This loudspeaker system stands out with its unique closed-cabinet design inspired by the d'Appolito arrangement, creating a visually stunning and acoustically optimized setup. Rigorous attention to design results in a 3-way audio system with dual woofers, tailored to achieve precise and dynamic sound reproduction, particularly noticeable in the responsiveness at lower frequencies.

Constructed with a focus on dynamics and efficiency, the ZGZ-801 ensures compatibility with a range of amplifiers, including tube types, thanks to its gentle impedance characteristics. The advanced passive crossover design incorporates a 3rd order pathway for the tweeter, a midrange, and a 2nd order pathway for the woofer, which utilizes high-quality air coils and metallized polypropylene capacitors. This carefully engineered crossover ensures a seamless blend across the audio spectrum, devoid of any abrupt frequency division.

Further enhancing its acoustic capabilities, the ZGZ-801 uses custom-designed transducers. These include two 8-inch woofers and an 8-inch midrange driver, each made with a rigid aluminum basket and a lightweight cellulose diaphragm, ensuring clarity and control across all sound levels. The midrange driver also features a built-in phase equalizer to handle high power levels while protecting the clarity of vocals and central frequencies.

The speaker’s enclosure boasts a robust "box-in-box" double design, adding significant mass (over 70 kg) to reduce vibration and minimize unwanted resonances. Beyond its technical prowess, the ZGZ-801 exudes elegance with its natural wood veneer finish, available in Black Ash or American Walnut, further complemented by optional black or traditional Polish linen grilles.

In terms of specifications, the ZGZ-801 supports a frequency response of 55 Hz to 20 kHz (±3 dB), with a sensitivity of 91 dB. It has an impedance of 6 Ohms and can handle a power rating of 190 W RMS. Connection options include dual terminals accommodating bi-wiring or bi-amping. Each unit measures 280 × 328 × 1188 mm and weighs approximately 74 kg, representing both its solid construction and careful consideration of acoustic design.


Unitra

History

Interesting articles

Tesla's Audio Downgrade in Model Y, What It Means

From Phonographs to Digital - Exploring Germany's Audio Museum

Analyzing Material Sound Absorption: A Path to Acoustic Harmony