SKU: 49705165402

BLAM RELAX MSA 20 - Extra-Slim Active Underseat Subwoofer

Sale price$123.75 Regular price$137.50
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Description

BLAM RELAX MSA 20 - Extra-Slim Active Underseat SubwooferThe RELAX MSA20 20 cm extra slim subwoofer with integrated 240 W amplifier from BLAM makes it easy to improve the quality of your original audio installation by adding bass without reducing too much space in the vehicle. At a height of only 65mm (66mm with Grill) the MSA20 slim design allows for easy installation in multiple locations throughout the vehicle. It fits perfectly under the seats of a van or SUV, or even on the rear bulkhead of a

The RELAX MSA20 20 cm extra-slim subwoofer with integrated 240 W amplifier from BLAM makes it easy to improve the quality of your original audio installation by adding bass without reducing too much space in the vehicle. At a height of only 65mm (66mm with Grill) the MSA20 slim design allows for easy installation in multiple locations throughout the vehicle. It fits perfectly under the seats of a van or SUV, or even on the rear bulkhead of a convertible or pickup. The sound will be immediately more powerful and enveloping, creating a new listening experience that will transform your simple journeys into moments of pure pleasure. 

What are the benefits of under seat subwoofers?

Under seat subwoofers are a fantastic solution for anyone looking to enhance their vehicle's audio experience without compromising on space. These compact devices are ingeniously designed to fit snugly under your seats, delivering powerful bass without overwhelming your cargo area. This makes them an ideal choice for sedans, SUVs, and trucks alike, where trunk space can often be limited.

One of the greatest advantages of under seat subwoofers is their ability to significantly improve sound quality. They are engineered to produce deep, rich bass that elevates music enjoyment, whether you're a fan of booming hip-hop beats or intricate jazz arrangements. With easy installation options, many drivers can upgrade their sound systems without needing extensive modifications or professional assistance.

Aside from their performance benefits, under seat subwoofers also maintain a clean aesthetic in your vehicle. Unlike traditional subwoofers that can take up considerable space, these sleek units blend effortlessly into your car's interior. The result? You can enjoy vibrant sound quality while preserving the minimalist look of your vehicle without cluttering your trunk with bulky equipment.

In conclusion, if you're looking to boost the bass in your vehicle's sound system while keeping your cargo area versatile and spacious, an under seat subwoofer is an excellent choice. It’s a perfect blend of functionality and design, catering to audiophiles and everyday drivers alike.

Technical Details

  • Complete solution to easily add bass to an original system.
  • 20 cm extra-flat die-cast aluminium subwoofer with integrated 240 W amplifier

Composition

  • Amplifier: Maximum power 240 W / Nominal power 120 W
  • Compatible with most original car radios
  • High level inputs with automatic start-up
  • RCA inputs
  • Frequency response: 50 Hz – 150 Hz
  • Bass boost (45Hz) adjustable from 0 to 12 dB
  • Fixed subsonic filter: 20 Hz
  • LPF (low pass filter): 50 Hz- 150 Hz / 12dB
  • Phase adjustment: 0/180
  • Supply voltage: 10 – 16 VDC
  • Extra-flat 20 cm (8″) subwoofer
  • Moving coil: 2 Ω 50 mm (2”)
  • Wired volume control (5 m cable)
  • Dimensions: W 290 mm x H 210 mm x L 65 mm
  • Weight : 3.9 Kg

Supplied Accessories:

  • Instructions for use
  • Wired remote control
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 49705165402

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Amazon Customer
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Blows Me Away!
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Reviewed in the United States on January 20, 2026
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EE friend
Bozeman, US
★★★★★ 5
A great engineering calculator
Color: Black
I am an electrical engineering professor. it is a struggle to find an inexpensive calculator to recommend to students that can handle complex matrices! There are other engineering calculators that I like much more than the 9750 (such as the hp-prime (my favorite) or the Casio fx-cg50) but this is the least expensive of the calculators I consider "engineering capable". I didn't mention the TI 84 because it handles complex math very poorly, and requires "Euler entry" of polar numbers. The TI-Nspire can do it all, but has way too many menu levels to get anything done. The 9750 doesn't support CAS mode, and the graphing capabilities are tedious, slow, and poor resolution, but as an engineering calculator I rate it highly because of the complex math and matrix capabilities. I like the larger "graphing" screen for showing larger matrices (not for graphing).
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Reviewed in the United States on November 13, 2025
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Dani
Whiting, US
★★★★★ 5
Great value for money, calculus and linear algebra Calculator
Color: White
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Reviewed in the United States on November 25, 2025
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Oumi-Annette Süsstrunk
Waukegan, US
★★★★★ 5
Recommended!
Color: Pink
This calculator model was recommended by the school for math classes, and my daughter has been using it for quite some time now. She's very happy with it and finds it reliable and easy to use. She especially loves that it comes in this color - it's a nice "girly" option that stands out from the usual standard designs.
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Reviewed in the United States on March 20, 2026
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Madeline Ayzenberg
Dallas, US
★★★★★ 4
Good and convenient.
Color: Black
A great calculator. Simple, has all necessary features, works well and quickly. Great for students and adults alike, works for a long time, responds quickly doesn’t lag. Havent needed to charge it yet- great battery life and screen, even has brightness and zoom options! Even spdurabke enough to hold up to all the times it’s been dropped😅 Overall, a great purchase.
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