MB Quart has long been recognized as a leading manufacturer of premium full-range speakers. Since mid-1960’s the MB Quart team has been innovating subwoofer designs for home and other custom applications for serious music critics. In the 1960’s these types of speakers were more often referred to as “transducers”. It is only natural that subwoofers from MB Quart are at the top of the industry in sound quality and technology for mobile audio applications.
The product development and engineering teams at MB Quart have worked overtime to design a line of subwoofers that are worthy of the MB Quart brand and a perfect match to the speaker lines offered in the MB Quart family.
MB Quart subwoofers are built from the inside out to deliver deep, musical bass.
In this exploded view of the top of the line Premium subwoofer, you can see that throughout the line, the subwoofers share technology to improve sound quality and power handling.
The cornerstone for the new subwoofer line is the use of an extra deep drawn high-density steel frame. This unique stamping process provides all of the appearance and performance benefits of cast baskets but without the cost and weight. This allows the designers to invest in other areas of the subwoofer like the cone and motor structure. You will agree these new baskets are work of engineering art!
Cone technology has also improved in the last 50 years. MB Quart mobile audio woofers now offer a clear distinction in technology between the three different series of subwoofers. Premium subwoofers are constructed from a unique red woven glass fiber composite. The lightweight skeleton cone structure is mated to a black inverted woven fiber cone strengthening dust cap. The Reference subwoofers utilize a similar design but with a more cost-effective thermal formed polypropylene in place of the glass fiber. The entry level Onyx subwoofer cones are constructed from durable injection molded polypropylene.
The suspension of the subwoofer controls the linear motion and provides the restorative force of the subwoofer. The Premium and Reference subwoofers use an ultra-violet treated butyl rubber surround with a dual balanced wave spider system. The Onyx subwoofers use a rubber surround with a single spider design. These two suspension elements combine to provide MB Quart subwoofers with incredible control under any load, small or large.
MB Quart Premium Subwoofer
The Premium Subwoofer from MB Quart is the most technologically advanced bass transducers the company has ever designed in its 50+ year history. The demands of mobile audio subwoofer systems are more strenuous than any musical application today. The Sound Pressure Levels that can be developed inside the vehicle can approach those of live concerts, that is big sound for a subwoofer! Therefore, the Premium Series is designed to make very deep, musical bass and handle the power from the biggest amplifiers available.
Deep, Musical Bass
The Premium Subwoofer is built on a heavy duty Deep Drawn Stamped Steel basket for increased rigidity. This foundation allows the engineers to develop features like a two tone woven glass fiber cone and dust cap with a 2.5” high temp aluminum voice coil. The voice coil former is secured to dual mirror image treated spiders for very linear excursion in the voice coil gap. Premium is the finest Subwoofer MB Quart has ever designed! Now, your system can finally be complete.
FUSED IMPEDANCE SELECTOR
For additional flexibility in system design the Premium Subwoofer features a Selectable Parallel/Series Impedance terminal that allows the subwoofer to be either 2 or 8 Ohms.
MB Quart Reference Subwoofers are the most versatile of the entire MB Quart line. First, there are two profiles; The standard depth subwoofers and the low profile (LP) models. The LP models are designed for installations where there is a challenge to fit a subwoofer into a shallow space.
The 12” only needs 3” mounting depth from the edge of the flange and this is for a 600 watt MAXX subwoofer. The standard depth Reference subwoofers utilize a 2” high-temp aluminum voice coil with dual mirror image treated spiders, a thermal formed polypropylene cone and butyl rubber surround. Regardless of your installation needs, either of the Reference profiles will deliver musical bass frequency with maximum power to drive your music.
Like the Onyx line of speakers, the Onyx line of Subwoofers from MB Quart are the perfect first step into the High End sound of MB Quart. The Onyx subwoofers feature a thermal formed polypropylene cone and 1.5” aluminum voice coil for strong musical bass. They also feature the same deep drawn heavy gauge stamped steel basket as Reference along with treated red spiders and spring loaded wiring terminals to make installation easy. Match the Onyx subwoofers with Onyx speakers and power them with any of the MB Quart Onyx amplifiers.
MB Quart Speaker Technology
Installation of high-end audio components in a car typically requires compromise due to the inconsistent nature of the environment. One issue in particular is tweeter placement. The ongoing struggle to find the correct balance between on-axis and off-axis placement greatly defines the system’s ability to offer proper staging and imaging.
The engineers at MB Quart recognized this issue and worked tirelessly on a solution that would offer predictable high-end performance in nearly any mounting location. The result is the artfully crafted WideSphere™ tweeter by MB Quart. Every WideSphere™ tweeter is designed to provide equal performance in both on-axis and off-axis configurations. In fact, the tweeter level and frequency response variations between on and off axis are only noticeable on the most expensive laboratory test equipment. The resulting benefit is a wide and deep sound stage with proper imaging placing you front row center of every selection you listen to.
MB Quart WideSphere™ Tweeters
Knowing the difference between WideSphere™ tweeters will help you understand the different levels of MB Quart car audio speakers.
Q-Series is a 40mm Teteron Silk Composite WideSphere™. The Q tweeter combines the exceptional dispersion and bandwidth technology of WideSphere™. with the smooth response of a Teteron treated silk dome.
Premium Tweeter is a 40mm Titanium WideSphere™. Titanium WideSphere™. construction provides exceptional dispersion and a wide bandwidth. With a 40mm inverted dome the Premium is able to offer exceptional frequency response well beyond the limits of human hearing.
Reference Tweeter is 30mm Titanium WideSphere™. 30mm Titanium WideSphere™. inverted dome provides exceptional dispersion and a wide bandwidth with a bit more frequency extension than the Onyx tweeter.
Onyx Tweeter is a 25mm Silk Dome. Treated silk provides the sound quality of a silk dome with the frequency response of metal composite materials. It’s light weight works great in lower power applications.
MB Quart Car Audio Speakers Technologies
For years, speakers were constructed of the most crude and basic materials available. The steel, foam and paper designs got the job done but advancements in technology required speakers that could expose the benefits of the improved electronics they were hooked up to. Early on, the MB Quart team recognized a need to develop better components in order to improve overall system performance.
The first major breakthrough was the use of an ABS composite speaker basket. MB Quart paved the way with this groundbreaking innovation. The ABS basket proved to be more durable than the metal materials used previously but the real benefit was the substantial increase in midbass frequencies produced from small drivers. The increased midbass provided a richer more full sound that brought the bass forward, substantially improving the systems sound stage. Since its original introduction, MB Quart has greatly improved the ABS basket designs through the addition of short strand fiberglass and nylon that further increase the rigidity of these innovative speaker baskets.
Speaker surrounds were also a concern as the standard foam materials readily available in the era quickly dried out and deteriorated. MB Quart tried several new materials before settling on a butyl rubber compound, another innovation from our engineers. This material proved to be more stable than foam and complemented the ABS basket nicely. Additional improvements over the years included a UV treatment to further increase reliability.
Speaker cone technology proved to be much more difficult as paper cones provided exceptional sound quality especially when mated to the new composite baskets and butyl rubber surrounds. It took years to come up with the right material but the MB Quart engineering team finally found a proprietary blend of Polypropylene that offered the low weight benefits of paper but the rigidity of plastics. Additionally, the cone could be easily molded into any shape. This led the engineering team to experiment with many cone geometries. The curvilinear shape they settled on provided excellent off-axis performance gains without sacrificing low frequency performance. Q has a nomex PMI Composite.
VOICE COILS and MAGNETS
The innovation didn’t stop there. Voice coil construction and magnet density were all addressed to ensure that every MB Quart speaker offers predictable long-term performance. Most importantly, these speakers fit! Every MB Quart speaker is designed for OEM replacement in almost every car on the road today.
Q Series: Cast aluminum basket and curvilinear composite cone. Durable cast basket mated to high quality composite curvilinear cone for improved frequency response and deep midbass. Premium gets ABS basket and composite cone. Durable ABS composite basket mated to composite curvilinear cone for improved frequency response, deep midbass impact. Reference gets ABS basket and IMPP cone. Durable ABS composite basket mated to injection-molded curvilinear cone for improved response and wide frequency range. Onyx gets ABS basket and thermal formed PP cone. Durable ABS composite basket mated to thermal formed cone for improved frequency response.
Q Series Components
When only the best will do, MB Quart offers the world renowned ‘Q’ Speakers. The QS216 offers the highest standard sound experience through innovative materials and superior workmanship that has no equal in the industry. The mid-bass woofer is made from Nomex PMI composite material designed to be both light in weight and rigid. This unique combination allows for a flat linear response and incredible low frequency reproduction with high sensitivity.
The QS216 touts a 40mm WideSphere™ Teteron silk dome tweeter allowing flawless reproduction of sound and improved durability. The high definition crossovers offer advanced “Q Control” for the tweeter and midrange with variable points of attenuation. To complete the package of superior performance, the Q crossovers feature MB Quart Balanced Temperature Control Technology. This technology ensures the highest quality sound, even throughout lengthy periods of high power listening.
Premium is the best choice when considering the finest in top of the line speakers for your system. The Premium components and coaxials feature the 40mm Titanium WideSphere™ tweeter and utilize a composite basket for reduced vibration and resonance especially at critical mid-range and mid bass vocal frequencies. The Premium series also rely on the same cone, surround and voice coil technology that makes MB Quart speakers the standard for critical listening. The midrange component employs a phase plug at the center of the cone to prevent higher midrange frequencies from canceling each other out. This is a critical element for any serious audiophile!
The crossovers in the Premium components are hand-picked to achieve seamless transition at 2900Hz from midrange frequencies to the higher frequencies handled by the tweeter. Premium crossovers also feature variable tweeter attenuation which something not found in Reference and ONYX. Additionally, the crossover housing is designed for easy installation and simply hides away behind the vehicle’s interior panels.
The Reference speakers from MB Quart are the most popular in the line! Using the 30mm inverted dome Titanium WideSphere™ and the top quality resonant basket and cone from Premium, the Reference line of speakers are a perfect choice for both components and drop in 2 way coaxials. Reference subwoofers are perfectly matched to deliver deep bass to a full system when incorporated with Reference speakers.
The Onyx line is the perfect entry into high end speakers! The MB Quart heritage was built on making great speakers, the Onyx line is no exception. The Onyx speakers utilize a 25mm Silk Dome tweeter. The treated silk provides the sound quality of a silk dome with the frequency response of metal composite materials. It is light weight and works great in lower power applications. The speakers are perfectly paired with amplifiers and subwoofers in the Onyx line. Your ears will certainly be pleased.
You have heard the cliche only as strong as your weakest link. With that simple statement, MB Quart engineers have focused on an important element in a car audio amplifier; the Pre Amplifier.
Q-Stasis Pre Amplifier Stage – Q-Stasis circuitry rejects noise and assures that clean signal is introduced into the amplifier circuitry. The signal that comes into the amplifier from the source unit can vary widely and depending on the length of the RCA cable, there is a nearly certain chance of noise being injected into that signal wire. Signal from a head unit can typically be as low as 0.2 volts and as high as 8 volts. It is critical that an amplifier be able to balance this input signal without allowing noise into the circuit. This means that MB Quart amplifiers featuring Q-Stasis are very clean and musical from the input stage to the output stage.
As shown above, the Q-Stasis circuit acts as a noise elimination circuit to keep the signal line very clean and musical.
Class Q1 and MYKRO
Most enthusiasts are familiar with the high efficiency of digital amplifiers. Digital amplifiers are popular because they can make large amounts of output wattage with minimal current draw (from the battery). MB Quart offers two styles; Class Q1 mono amplifiers featured throughout the line and the new MYKRO full range Class D.
Imagine the smoothness of water. This is the smooth sounding imagery that MB Quart engineers have achieved with FLUID-FETS. All MB Quart amplifiers use a MOSFET circuitry that removes the harshness of the MOSFET circuit maximizing power efficiency while improving sound quality.
The finest amplifiers for home audio are Class A. Small power, while pure, a 25 watt Class A amplifier for the home can easily cost $5,000. Most car audio amplifiers are designed as Class A/B. This is great for mobile audio because it can produce good power for a lot less money. The MB Quart engineers use Class SQ. Similar to a Class A/B design, but, the Class SQ is specifically designed for the sound quality demands of the MB Quart enthusiast by adding just a small amount of biased current through all output transistors at all times. This means that the circuit is always on or passing current and dramatically reduces crosstalk noise and distortions.
Q-Curve Electronic Crossover Control
MB Quart engineers are constantly working towards improving the listening experience. The new RA Reference Series amplifiers feature an improved crossover filter variation called Q-Curve.
Q-Curve is a variation of the Butterworth Filter principles and allows for a smooth rollover without any ripple. Similar to Butterworth, Q-Curve is flat in the pass-band and rolls off towards zero in the stop-band. Where Q-Curve varies from a traditional Butterworth design is in the control of the roll off and the selected frequencies. When referencing the High Pass filter on the amplifier, MB Quart has provided a -12dB per octave roll off at the lower frequencies and -6dB roll off as you move towards the higher frequencies on the potentiometer. This allows for a more linear phase response in the pass-band and a favorable roll-off to the stop-band when comparing the frequency of the adjustment to the size of the speaker being filtered.
MB Quart offers four lines of amplifiers to assure that system design, power requirements and installation flexibility options will match up perfectly to your system.
The MB Quart engineers designed the Reference line of amplifiers for one reason. “Give enthusiasts the best sound amplifier available for a critical listening audio system.” With a mix of sound quality technologies, MB Quart amplifiers are about making music, not just sound pressure levels. The MB Quart Reference amplifiers feature Q-Stasis pre-amplifier sections to keep incoming noise from source units at nearly immeasurable levels and Class SQ designs with FLUID-FET output devices to mimic the sound quality of the highest end home amplifiers. There is no doubt that these CEA compliant amplifiers have the high end sound and power you demand.
The mono amplifiers in the Reference line feature our proprietary Class Q1 technology. Similar to the topology used in high efficiency Class D amplifiers, the Class Q1 focuses on keeping distortions low and musical signal as the priority. The end result is an amplifier with the efficiency of Class D but sonic accuracy and clarity found in Class A/B.
For installation, the best feature of Reference might be the top mounted controls. All amplifier and equalization controls are accessible by removing the small panel on the top of the amplifiers. If your goal is to have the best sounding musical system possible, Reference amplifiers will be the foundation to the perfect system. Goal achieved!
Brand new from the MB Quart engineers is the Reference MYKRO, a full range Class D line of amplifiers. MYKRO amps feature the same musical technologies of Q-Stasis pre-amplifier section for reduced input noise and FLUID-FETS output devices along with specific technology that allows us to develop a compact size that is highly efficient with very low heat output. These characteristics make the MYKRO Full Range Class D designs perfect for systems that require big power in a smaller space. MYKRO is CEA compliant and available in 1, 4 and 5 channel configurations
Onyx is the perfect first step for building a high end audio system. The technology driving the Onyx line is the MB Quart standard. Low noise input section with the pre-amplifier utilizing Q-Stasis and FLUID-FET output devices to make big power while remaining very musical. The Onyx amplifiers feature both Class SQ circuitry and Class Q1 for big power digital output mono amplifiers. Onyx amplifiers are available in 2, 4, 5 channel models plus several mono amplifiers to perfectly design your audio system.
MB Quart was founded on the banks of the Neckar river in Germany in 1962. While music production has always been at the heart and soul of MB Quart, getting great music into our water craft has always been an enormous part of the fun.
Nautic Marine Amplifiers
Nautic amplifiers are not automotive amplifiers. While they will work just fine in a car or truck, they are purposely built to very strict standards set forth by both the American Boat and Yacht Council (ABYC) marine electronics standards and the American Society for Testing and Materials (ASTM).
Nautic Amplifier Technology
The marine environment, whether sea, brackish or fresh water is a brutal place for amplifiers, speakers and subwoofers. The MB Quart Nautic series is the perfect choice for your boat, wave runner or river float. Besides being designed for the harsh marine environment, the MB Quart Nautic line of amplifiers is packed with musical technology. Low noise input sections in the pre-amplifier utilizing Q-Stasis Pre Amplifier circuitry and FLUID-FET output devices to make big power while remaining very musical set Nautic apart at any Marina. All Nautic amplifiers feature Class SQ circuitry which assures great sounding music while making plenty of power. Specific for marine installations the Nautic amplifiers are available in 2, 4, 5 and a 6 channel configurations so you can drive speakers on the deck or in the cabin and have plenty of power for subwoofer channels. It is possible to have “better” sound on the water, the solution is Nautic from MB Quart.
MB Quart Nautic Marine Speakers
The tweeters use a .75” or 1” titanium dome tweeter, which is the MB Quart sound and the 10” low profile subwoofer only needs 3” of mounting depth. The voice coil assemblies are sealed against the elements and even the spiders are resin coated to resist the elements. Speakers are available in 6.5” round or 6x9” coaxial and the subwoofers are available in 10” standard depth or shallow. Nautic speakers and subwoofers will deliver years of music summer after summer.
MB Quart Nautic Marine Subwoofers
Nautic speakers and subwoofers are ready to “Hit It!” Every component in the Nautic speakers and subwoofers has been rigidly tested to resist the environment of fresh and salt water, including air which can lead to rust. The crossovers utilize special protective sealing lacquer and gold plated terminals to resist corrosion. From the UV resistant fiber reinforced ABS basket and grills to the V4A certified stainless steel mounting screws. Nautic components are shielded to prevent anything getting in, so only music can get out.
MB Quart Nautic GMR-1 Marine and Powersports source unit
The MB Quart Nautic GMR-1 Marine and Powersports source unit is the perfect source unit for any vehicle that will be exposed to the elements. The GMR-1 has been extensively tested to be waterproof, dust proof and UV stable. Eliminating moving parts like a CD drive further increases durability while decreasing size and substantially. MB Quart’s Bluetooth Connect allows you to stream music from your favorite handheld device via Bluetooth™ opening up a world of entertainment options.
The GMR-1 source unit is great for applications where limited space is available in an outdoor vehicle such as a boat or All-Terrain Vehicle (ATV). Even though it is only the size of an aftermarket gauge, it can still power up to 4 speakers with 40 watts per channel, totaling 160 watts.
The GMR-1 Bluetooth™ Source Unit has no CD player. Instead it has an AM/FM radio and RCA Aux audio inputs on the rear which can be used to play the audio from iPods, portable satellite radios, etc. It also will play your digital MP3 or WMA files when you connect your MP3 player or Flash drive to the rear USB port (MP3 players will also be recharged).
Marine and Powersports Bluetooth Source Unit Features:
MB Quart Bluetooth™ Connect Features: