3. Car audio speakers & Subwoofer sound upgrades for the car
  5. QB251A

QB251A

5 reviews

150 Watt

QB251A

5 reviews

Technical Highlights

  • Power: 150 Watts RMS, 300 Watts MAX, Impedance at 45 Hz.
  • Variable low-pass filter: 50–150 Hz, aluminum heatsink.
  • RCA, high-level inputs: automatic turn-on function.
  • More technical details
€176.18
-29% €249.00 €176.18
2% discount with credit card

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ProductQB251A

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1 year extra warranty

Every product purchased from Masori includes an additional year of warranty in the third year after purchase (months 25–36). We cover repair or replacement free of charge for covered warranty claims. Automatic and free – exclusively for Masori customers. Your statutory rights remain unaffected.

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€176.18
€249.00 €176.18

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Discover the QB251A, a 10 inch (25 cm) active enclosure subwoofer from MB Quart, delivering powerful bass with 150 watts RMS and up to 300 watts MAX. Customize the sound with the phase switch and bass boost individually at 45 Hz. The subwoofer features an adjustable low-pass filter from 50 to 150 Hz, an automatic turn-on function, as well as RCA and high-level inputs. The aluminum heatsink enclosure ensures optimal performance, and thanks to the bass level remote control, you can conveniently adjust the sound. With its compact size of 355 x 78 x 270 mm, it can be placed flexibly.

Features

  • 25 cm subwoofer
  • 150 watts RMS
  • 300 watts MAX
  • Phase switch 0° / 180°
  • Bass boost 0-12 dB @ 45 Hz
  • Low-pass filter 50 – 150 Hz @ 12 dB
  • Automatic turn-on function
  • RCA inputs, high-level inputs
  • Aluminum heatsink enclosure
  • Bass level remote control
  • 355 x 78 x 270 mm

datasheet

Open data sheet

Frequently Asked Questions about QB251A

How powerful is the MB Quart QB251A Subwoofer?

The MB Quart QB251A Subwoofer has an RMS power of 150 watts and reaches a maximum power of 300 watts. The high power ensures that the subwoofer delivers powerful and deep bass, providing an immersive sound experience. Especially if you enjoy listening to music loudly, this power gives you the necessary bass strength. Another highlight is the phase switch, which allows you to optimally adjust the sound to your acoustic conditions. With the bass boost, you can increase the bass level at 45 Hz by up to 12 dB to perceive deep frequencies even more intensely. These performance specifications ensure powerful and clear bass.

How does the adjustable low-pass filter work on the QB251A?

The adjustable low-pass filter of the MB Quart QB251A allows you to control the frequency range of the subwoofer between 50 and 150 Hz with a slope of 12 dB. This is helpful for seamlessly integrating the subwoofer into the existing speaker system and optimally distributing the frequency spectrum. By adjusting the filter frequency, you can avoid disruptive frequency overlaps and improve the sound character of your audio system. The low-pass filter ensures that only low frequencies are sent to the subwoofer, resulting in more precise and clearer bass reproduction.

What advantages does the aluminum heat sink housing of the QB251A offer?

The aluminum heat sink housing of the MB Quart QB251A Subwoofer offers several advantages. It serves for efficient heat dissipation, keeping the operation of the subwoofer stable even at high volume and preventing overheating. This extends the lifespan of the device while ensuring consistent performance. Additionally, the robust aluminum housing improves acoustic properties by reducing cabinet vibrations, thereby enhancing clarity and precision of the sound. Aluminum as a material also provides an elegant, sleek appearance, giving the subwoofer a modern look that seamlessly integrates into various CI designs.

How can the phase switch on the QB251A be used?

The phase switch of the MB Quart QB251A allows you to adjust the phase of the Subwoofer between 0° and 180°. This feature is crucial for perfectly matching the Subwoofer to your existing speakers and compensating for sound differences under varying room and positioning conditions. Phase adjustment ensures coherent bass reproduction, which is especially important in complex speaker setups. It is worth experimenting with the phase switch while listening to music at different volumes to find the ideal sound setting for your setup.

What inputs are available on the QB251A?

The MB Quart QB251A is equipped with RCA and high-level inputs, allowing for flexible integration into various audio systems. The RCA inputs are ideal for use with modern car radios or home audio systems with corresponding outputs. The high-level inputs are particularly useful when your audio system does not have dedicated Subwoofer outputs and you want to tap the signal directly from speaker outputs. This versatility in connections helps you easily integrate the Subwoofer into almost any audio setup, regardless of the existing hardware.

How does the automatic power-on function of the QB251A work?

The MB Quart QB251A features a convenient automatic power-on function that activates the Subwoofer as soon as a signal is detected at the inputs. This function helps to increase user comfort and optimize power consumption, as the Subwoofer does not need to be manually turned on and off constantly. The system automatically goes into standby mode when no signal is detected for an extended period, saving additional energy. This automation reduces the risk of accidentally leaving the Subwoofer on, providing extra convenience for the user.

What placement options does the MB Quart QB251A offer due to its dimensions?

With compact dimensions of 355 x 78 x 270 mm, the MB Quart QB251A can be flexibly placed in various positions, even in vehicles with limited space. Its low height of 78 mm makes it particularly suitable for placement under seats or in other tight spaces, which also contributes to sound distribution. Thanks to its well-thought-out design, you can easily install the Subwoofer in the trunk or on the back seat without taking up much space. This flexibility is further enhanced by its solid construction, which reduces vibrations.

How does the Bass Boost affect the sound of the QB251A?

The Bass Boost of the MB Quart QB251A allows for an increase in bass level by 0 to 12 dB at a frequency of 45 Hz. This feature is ideal for emphasizing the depth and energy of the bass and adjusting it according to personal preferences. With the specific frequency boost, you get a precise and powerful low-frequency range, which is particularly beneficial for bass-heavy music genres. For many users who desire a stronger bass presence, this adjustable Amplifier offers the opportunity to significantly enhance the sound signature and personalize the listening experience.

What control options does the remote control of the QB251A offer?

The remote control of the MB Quart QB251A allows for convenient control of the bass level directly from your seat. This provides flexibility in adjusting the sound without having to physically go to the Subwoofer, which is especially practical while driving. The ability to quickly and easily adjust the bass level to different music styles or preferences greatly expands the Subwoofer's range of use. This remote-control capability offers added convenience and allows you to adjust the bass level in real-time to achieve the best sound result for any situation.

What advantages does the combination of features in the QB251A offer?

The combination of features in the MB Quart QB251A, such as the phase switch, the Bass Boost function, the adjustable low-pass filter, and the aluminum heat sink housing, gives you the ability to comprehensively tailor the Subwoofer to your acoustic preferences and spatial conditions. The combination of these functions ensures that you can achieve an excellent sound image regardless of your specific needs and placement options. Along with the practical input options and the automatic power-on function, the QB251A ensures that you have a straightforward and highly efficient bass solution for your car or home that delivers outstanding sound at all times.

Manufacturer information/responsible person

Audio Design Loudspeaker Sales GmbH
Am Breilingsweg 3
76709 Kronau
Germany

Authorized Managing Director:
Bruno Dammert

Contact: info@audiodesign.de

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