Dear Valued Customer

Congratulations on your purchase of the Hohmann “Platine Noiree” Signature series loudspeakers. The newly released Platine Noiree 7.1 home theater speakers are designed to provide Audiophiles with years of high-fidelity music enjoyment. The Platine Noiree group is made of two (2) tower speakers, one (1) center speaker, two (2) dipole speakers and two (2) monitor speakers - all magnetically shielded.

Handcrafted from 1" high density fiber boards, each cabinet is internally braced and reinforced using premium grade solid wood and epoxy mix. Multi-stage finishing begins with extensive priming and sanding of the cabinet surface. Followed by several layers of black and silver lacquer, with fine sanding in between. All covered by a smooth 1/8" clear lacquer coat. The extensively polished cabinet possesses smooth and super refined finish that resets the standard of elegance. The Platine Noiree speakers are perfectly balanced and matched for the optimum experience in home theater, they are designed to dramatically enhance your enjoyment of music and films at home, by adding power and impact to images and sound effects.

Earthquake Sound Corporation is a subsidiary of the Hohmann International Group - manufacturers of fine mobile and home audio products. Earthquake was founded in 1984, by Joseph Y. Sahyoun - a brilliant engineer and a well-respected leader in developing new technologies. Mr. Sahyoun states: "unlike many new comers to the business, this is not a retailer dream of making it big, or a corporate investment driven venture"; Earthquake is a product of "need and not greed". Earthquake is an Engineering driven company, recognized by CEMA - Consumer Electronics Manufacturing Association - as a leader in "design & engineering" of mobile and home audio products.

Rave reviews: Earthquake products (mobile & home) enjoy rave reviews from the industry leading publications. Car Audio & Electronics, Mobile Electronics, Home Theater Magazine, Widescreen Review, Stereophile Guide, Digital Home Entertainment and many other notable magazines had nothing but praise when testing Earthquake products.

Awards: the prestigious Consumer Electronics Manufacturers Association CEMA bestowed several Design and Engineering Excellence awards on the Nova products. This was no accident, it is the natural result of years of accumulated R&D in the mobile audio arena; a massive knowledge of audio and electronics that was applied to home audio products. Suffice to say, Hohmann International and its subsidiaries have accumulated over 20 awards in Design & Engineering Excellence.

Patented inventions: Hohmann International and its subsidiaries (Nova, Earthquake Sound) are proprietors of multiple advanced patents. They lead the way in designing the only Symmetrically Loaded Passive Radiator, used in mobile and home bass production alike. The Optically Coupled Distortion Limiting circuitry (OCDL) created to eliminate audio amplifier input stage clipping without distorting the audio signal. Plus many other protected patents that can not be disclosed at this time.

This owners manual is designed to better acquaint you with the Platine Noiree speakers system, and to guide you through the phases of system design and application. It is imperative that you read this manual in its entirety. Our technicians and staff are looking forward to answer any questions you might have, please call (1-800-576-7944).

Sincerely,

Joseph J. Sahyoun - President.

CAUTION: the Platine Noiree loudspeakers are capable of generating high sound pressure levels. You should exercise caution when operating these speakers. Long term exposures to high levels of sound pressure will cause permanent damage to your hearing. Sound pressure levels exceeding 85dB can be dangerous with constant exposure, set your audio system to a comfortable loudness level. Earthquake Sound Corporation does not assume liability for damages resulting from the direct use of the Platine Noireé loudspeakers , and urges users to play music in moderate levels.

PN-4521 specifications

The Earthquake Sound PN-4521 is a powerful subwoofer that stands out in the audio industry thanks to its advanced technologies and impressive features. Tailored for home theater enthusiasts and audiophiles alike, this subwoofer delivers exhilarating low-frequency performance, creating an immersive sound experience.

One of the notable features of the PN-4521 is its robust 15-inch woofer. This larger driver size allows for deeper bass response compared to standard subwoofers. When combined with the subwoofer’s high power handling capabilities, the PN-4521 can produce rumbling lows that not only enhance music listening but also elevate the experience of watching movies, making explosions and rumbles come to life.

The PN-4521 employs Earthquake Sound's unique patented technologies, including the Direct Port Technology. This innovation ensures that the subwoofer can efficiently convert power into sound without any distortion. By engineering the cabinet with precision, the design minimizes turbulence, resulting in clear and articulate bass that tightens the overall sound.

Another significant characteristic of the PN-4521 is its adjustable crossover settings, allowing users to tweak the output to their preference. With a wide frequency response range, the subwoofer can seamlessly integrate with various speaker setups, making it a versatile choice for different audio systems. Whether you want to feel the low end in music or need the bass to support your home theater system, the PN-4521 adapts accordingly.

The subwoofer is built with durability in mind. Its sturdy enclosure not only contributes to the quality of sound by reducing unwanted resonances, but also ensures longevity. The attractive finish and thoughtful design allow for easy integration into any room, complementing both aesthetic and acoustic needs.

In terms of connectivity, the PN-4521 offers multiple input options, including speaker level and line-level inputs, making it compatible with a wide range of audio equipment. The user-friendly layout ensures that installation is straightforward, empowering users to make the most out of their audio experience.

Overall, the Earthquake Sound PN-4521 is an excellent choice for those seeking a powerful, reliable, and versatile subwoofer. With its combination of advanced technology, quality construction, and user-friendly features, it promises to deliver an extraordinary sound that will satisfy even the most demanding audiophile.