Subwoofer Autotek A250BP

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subwoofer in a bandpass enclosure, 10\", 250 W RMS, 4 Ω
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Subwoofer Autotek A250BP

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Autotek A250BP is a compact subwoofer in a bandpass enclosure, designed for users who want a pronounced bass upgrade without complicated installation or tuning. Inside the enclosure works a 25 cm subwoofer with a 50 mm voice coil, optimized for higher acoustic pressure in a limited space. The bandpass design delivers a more emphasized and "harder" bass character that remains clearly audible even in a noisier car interior. The cabinet is covered with quality carpet with an embroidered logo and the front is complemented by a transparent panel with blue LED backlighting that highlights the subwoofer with its chrome-plated pole piece. Thanks to its compact dimensions, the A250BP is especially suitable for the luggage compartments of small and mid-size cars, where it offers a pronounced bass effect without the need for a large enclosure volume.

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Main features

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25 cm subwoofer in a compact bandpass enclosure.
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250 W RMS power and up to 500 W peak power.
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50 mm voice coil for better power handling and stable operation.
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Bandpass construction focused on higher acoustic pressure and a pronounced bass effect.
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Quality carpet covering with an embroidered Autotek logo.
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Subwoofer with a chrome-plated pole piece.
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Integrated blue LED lighting for a striking visual effect.
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Compact dimensions suitable even for smaller luggage compartments.
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About the brand

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Autotek is originally a classic American car audio brand that has been on the market since the early 1980s, when it was founded by a group of car enthusiasts. In later years it became part of the Maxxsonics USA group, which incorporated the brand into its broader portfolio and preserved its focus on simple, reliable and affordable audio solutions. Today Autotek offers a basic range of products intended primarily as direct replacements for factory components or for no-fuss audio upgrades without complex modifications.

Catalog number	A250BP
Brand	Autotek
Links	Official web presentation
RMS powerThe RMS power of the subwoofer is constant power. This is also the performance of continuous use of the subwoofer. If you exceed the power for a longer period of time, irreversible damage or subwoofer voice coil burning! You can tell if the subwoofer is overloaded by the vibration of the subwoofer membrane.	250 W
Max. (maximum performancePeak performance , which the subwoofer can play momentarily (approx. 0.5 s), for example when hitting drums in a song. If the maximum power is exceeded, damage can quickly occur or subwoofer voice coil burning!	400 W
The diameter of the subwoofer in the box	10" (250 mm)
ImpedanceImpedance - measurement of electrical resistance. When buying a subwoofer, it is very important that everyone make sure that the impedance is compatible with the amplifier that you are connecting to it. For subwoofers with a double voice coil, we recommend following the information in the advice center! Example: A 2 Ohm subwoofer cannot be connected to an amplifier that is only stable up to 4 Ohms. A 4 Ohm subwoofer can easily be used with an amplifier that is stable up to 2 Ohms. Connecting a 4 Ohm subwoofer to an amplifier that is stable up to 4 Ohms also without problems. The most common subwoofer impedance is 4 Ohm. Example: A 2 Ohm subwoofer cannot be connected to an amplifier that is only stable up to 4 Ohms! A 4 Ohm subwoofer can easily be used with an amplifier that is stable up to 2 Ohms. The most common impedance of subwoofers is 1 x 4 Ohm.	4 Ω
Loudspeaker typeThe closed enclosure is characterized by a simple construction. Closed enclosures are usually smaller than bass-reflex enclosures, and a special damping fleece is used for their damping. A closed baffle has the advantage of preventing an acoustic short between the front and back radiation of the subwoofer diaphragm. The disadvantage is that the closed enclosure raises the natural resonance frequency of the used subwoofer and thereby also increases the lower limit frequency. This is because the back side of the diaphragm is forced to compress and dilute the air inside the enclosure when the subwoofer is radiating in a closed enclosure. This adds to the inherent stiffness of the subwoofer's oscillation system the stiffness of the air in the closed enclosure. This causes an increase in the stiffness of the oscillating system and thus an increase in the resonant frequency of the entire system: subwoofer -> loudspeaker. The increase in resonant frequency for a given subwoofer is greater, the smaller the volume of air in the closed enclosure. The relatively small volume of air in the closed enclosure acts on the subwoofer as an acoustic spring when radiating the back side of the membrane into the enclosed enclosure. USE: Mainly for quality bass listening in the entire band with an emphasis on detail and accurate reproduction in the lower band. Pros and cons: + pure reproduction + small closets + easier tuning - low level of efficiency in deep bass - loudness only at the cost of enormous deflection of the diaphragm - a significant acoustic pressure cannot be expected The bass reflex enclosure is designed in the same way as a closed enclosure, but it also has a so-called bass reflex mouthpiece, or "bass reflex". Needle foam is used to dampen bass reflex enclosures. USE: The ideal use is in cases where the listener wants to achieve a high volume and a good sound pressure level. It is the best compromise between sound quality and performance and is also the most commonly used Pros and cons: + good efficiency in deep bass + a small deflection of the membrane is enough for a large volume - reproduction less accurate than with closed enclosures	Bandpass
Dimensions of the boxEnclosure dimensions are given as height, width and depth, which is often longer at the bottom edge than at the top, due to the bevel of the rear wall.	405 x 340 x 390 / 310 mm