SKU: 49705165402

BLAM RELAX MSA 20 - Extra-Slim Active Underseat Subwoofer

Sale price$123.75 Regular price$137.50
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Ships within 48 hours · Estimated delivery Jul 26 - Jul 31

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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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Mel H.
Lake Worth, US
★★★★★ 5
Quality item and super comfy.
Size: XX-Large, Color: Light Grey Heather
Got this for my son to take on a field trip in case it got lost it wasn’t one of his expensive ones. Oddly enough it’s so comfy it’s now his favorite hoodie and he wears it all the time and keeps it in his backpack. Holds up well to constant washing.
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Reviewed in the United States on May 18, 2026
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Harper
Pawtucket, US
★★★★★ 5
WARM, not thin material
Size: Small, Color: Blue
Hoodie is comfy, warm and soft. Fits true to size, especially for a child who is a bit small for their age. Holds its' integrity in the wash. VERY happy with this purchase and will be buying more colors in the future.
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Reviewed in the United States on May 21, 2026
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SilverFern
Bozeman, US
★★★★★ 5
Good hoodie
Size: Large, Color: Light Brown
Was more brown than I thought. But still liked it. Recommend. True to size.
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Reviewed in the United States on May 13, 2026
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MaddDembinski
Birmingham, US
★★★★★ 5
Runs small
Size: 3T, Color: Black
Runs just a little small. Maybe upsize, but great otherwise!
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Reviewed in the United States on February 28, 2026
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Lorraine
Boise, US
★★★★★ 5
I was delighted with the quality and color
Size: X-Small, Color: Lilac
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Reviewed in the United States on October 26, 2025

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