Helix MS8B-BMW MATCH Subwoofer

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Found these subwoofers in my car when installing a pair of BAV Ghost Subwoofers I just bought for my e90 m3 w/ individual sound system.

These woofers are the 4ohm which is not compatible with the HiFi systems.
Probably why I didn't have any bass.



Here's some tech info I found on the web for them;

Helix MS8B-BMW MATCH woofer 20 cm suitable for: 1er (E 81,82, 87,88), 3 (E 90,91, 92, 93), 5 series (E 60,61), X1(E84), X3(E83), X 5 () E70), X6(E71)

200 mm subwoofer with neodymium magnet for under seat installation in BMW cars, fits in the original mounting positions under the front seats

The ideal solution for those who are not satisfied with the bass in their BMW. This powerful and enormously robust 200 mm subwoofers are equipped with vehicle-specific baskets, so a shoring in the original mounting positions under the front seats is possible without any problems. The MS is not only a significant appreciation in the vehicles that have factory the smaller 16 cm woofer, but also an absolute must, if powerful additional amplifier be installed 8B-BMW.1

• 200 mm under seat subwoofer for BMW vehicles
• guaranteed compatibility with 1 series (E81/82/87/88), 3 series (E90/91/92/93), 5 series (E60/61) and X 1 (E84)
• Easy installation thanks to BMW-specific basket
• Fits in the original mounting positions under the front seats
Very high load capacity - ideal for sound systems, where additional power amplifiers are used •

Power RMS / MAX 100 / 200 w
Frequency range 30 Hz - 140 Hz
Efficiency
90 dB 1W / 1m
4 OHM IMPEDANCE
Diameter
200 mm

[Grant8311]

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