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

Unitra

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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.


ZGZ-801


iFi Audio has recently launched the hip-dac 3, a portable DAC/headphone amplifier, garnering attention in the audiophile community. The third-generation device comes in a sleek Titanium Shadow finish, housed in a robust aluminum enclosure. This latest iteration is not just a step up in aesthetics but also in functionality and performance.

#### Compact Design Meets Superior Performance

The hip-dac 3's design is noteworthy for its compactness, easily fitting into pockets or bags, making it an ideal travel companion for music enthusiasts. Its primary function is to replace the subpar DAC and amp circuitry in smartphones, tablets, and computers, thereby significantly enhancing headphone sound quality. Whether at home, office, or on the move, the hip-dac 3 promises to engage listeners with its dynamic and refined sound.

#### Key Technical Enhancements

One of the standout features of the hip-dac 3 is its ability to deliver up to 400mW for 32Ω headphones, ensuring wide compatibility across various headphone types. It also supports high-impedance headphones up to 600Ω. The device's balanced circuit design is a rarity at its price point, effectively reducing signal distortion for a purer sound.

Incorporating high-quality components such as a custom iFi OV op-amp and a low-noise power supply IC from Texas Instruments, the hip-dac 3 also features a high-quality analogue volume pot. This combination results in a significant improvement in sound quality, setting it apart from other portable DAC/amp options.

#### User-Centric Features

The hip-dac 3 is tailored for user convenience with its PowerMatch and iEMatch features. PowerMatch optimizes power delivery to the headphones, ensuring optimal performance regardless of headphone type. The iEMatch feature is particularly beneficial for high-sensitivity headphones, reducing hiss and enhancing detail. Another user-friendly addition is the XBass feature, which boosts bass frequencies without compromising midrange clarity.

#### Advanced Connectivity and Battery Life

The device's USB-C audio input handles audio data up to 32-bit/384kHz and offers asynchronous data transfer for jitter-free sound. The separate USB-C charging port allows for uninterrupted usage while charging. The hip-dac 3 offers two outputs: a 3.5mm socket for single-ended headphones and a 4.4mm balanced output. The device’s battery life lasts for approximately 7-12 hours, depending on usage, and includes essential cables for connectivity.

#### Pricing and Availability

The hip-dac 3 is priced at £199, €199, and US$199, making it an attractive option for those seeking high-quality audio in a portable form. It stands out as a perfect option for music lovers who use corded headphones or earphones and seek a significant upgrade in their audio experience.

#### Community Reception

The hip-dac 3 has received a positive response from users and enthusiasts, particularly for its upgraded features and improved functionality over previous models. The switch to USB-C connectivity has been a major highlight, aligning with modern device standards and user preferences. The community's feedback reflects a strong appreciation for the device's enhanced audio quality, portable convenience, and the thoughtful inclusion of user-centric features.

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Enhanced Bass with the New XBass Feature in iFi's hip-dac 3

Discover 400mW power with the hip-dac 3: iFi Audio's latest innovation for a dynamic, immersive audio experience.

Acustica Applicata is gearing up to make a splash at the Munich High End Show, a big event for audio tech enthusiasts. They're bringing their latest gear including a new tube amplifier called the ALIENO 150-120 LTD. This isn't just any amp; it stands out because it's versatile enough to use two different types of tubes – the 300B and the 2A3. Depending on which tube you pop in, it can kick out either 150 watts or 120 watts per channel. This means you can tweak the sound to suit your taste without fussing around with extra settings or tools.

The ALIENO 150-120 LTD is designed to make life easy. It has a smart dual display that shows which tube type is currently rocking out, ensuring everything's running smoothly under the hood automatically. They're also showcasing a tube phono preamp that goes hand in hand with the amp, aimed at vinyl fans looking to get the best out of their records.

Their booth at the show isn't just about flashy tech; it's set up to demonstrate how well their products work with other high-end equipment. They've teamed up with Cessaro Horn Speakers and Döhmann Audio to create an impressive sound environment, complete with some of the top speakers and turntables on the market.

So, if you're into your audio gear, this setup at the Munich High End Show is something you'd probably want to check out. Acustica Applicata seems to have put a lot of thought into making devices that not only push the boundaries in terms of power and flexibility but also focus on user-friendly features, making high-quality sound accessible to more than just the hardcore audiophiles.

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Acustica Applicata Debuts ALIENO 150-120 LTD at Munich's HiEnd Show

Acustica Applicata is a company that specializes in designing and manufacturing high-end audio equipment.

Acustica Applicata

Explore highlights from the Munich High End Show featuring Acustica Applicata's innovative designs


Nagra, a trailblazer in audio technology, has released the HD Phono, a phono preamplifier that represents the culmination of years of dedicated research and development. Building on the legacy of the Nagra IV-S and the PL-P preamplifier, the HD Phono is an integral part of Nagra's prestigious HD range, complementing the HD PREAMP, HD DAC X, and HD AMP monoblocks.

The HD Phono's design is a marvel of engineering, featuring a two-chassis setup. The phono stage circuitry is housed in a CNC machined aluminum chassis for isolation and stability, while a separate chassis contains a massive supercapacitor external power supply. This design offers the advantages of rapid charge delivery and high current load stability, surpassing traditional battery-based systems.

At the heart of the HD Phono are its dual-mono, pure Class A tube stages, and a remote-controlled cartridge load adjustability feature, allowing for precise matching between the cartridge and phono stage. This level of customization ensures an unparalleled vinyl listening experience. Additionally, the HD Phono employs a new generation of input transformers with Cobalt cores, cryogenically treated to enhance performance.

Technical specifications of the HD Phono include an overall gain of up to 68.5 dB, multiple input options, and cutting-edge filtering capabilities. It supports various de-emphasis curves and cartridge modes, offering an exhaustive range of settings for audiophiles to explore.

Priced at $87,500, the Nagra HD Phono is now shipping worldwide, available through Nagra’s network of retailers. This release is a testament to Nagra's unwavering commitment to pushing the boundaries of vinyl audio reproduction, offering a sound experience that is as refined as it is revolutionary.

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Nagra HD Phono: A Masterpiece in Vinyl Audio Engineering

Nagra HD Phono: The ultimate in vinyl playback, featuring cryogenically treated transformers and a supercapacitor power supply

ZGZ-801

by Unitra

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Interesting articles

Enhanced Bass with the New XBass Feature in iFi's hip-dac 3

Acustica Applicata Debuts ALIENO 150-120 LTD at Munich's HiEnd Show

Nagra HD Phono: A Masterpiece in Vinyl Audio Engineering