BLAM presents the RELAX BM 100NS, a set of innovative 2-way 4 Inch (100mm) component speakers perfectly designed for BMW and Mini car models. Speaker upgrades can be more difficult on BMWs and Minis as they have very narrow 10cm slots in the doors and very specific subwoofers under the front seats. These speakers are custom made to make the installation process faster and make the sound image more precise and clear.
The BM 100 NS kit is a two-way system. The 25mm soft dome tweeter can be surface mounted, flush mounted or mounted in the original location. Regarding performance, this kit announces 60 Watts RMS, 88 dB and a response of 120 to 20000 Hz.

Technical Features

• 2 x 100 mm BMW special plug & play speakers/ woofers
• 2 x 25 mm soft-dome tweeters
• 2 x 6 dB/octave in-line high-pass filters.
• 100 mm woofer
• Max power 100 W
• Nominal power 50 W
• Frequency response 80 Hz / 30 kHz
• Sensitivity 90.3 dB
• Impedance 2 Ω

Characteristics

Woofer/ Speakers

• Original BLAM glass-fiber reinforced composite salad bowl with BMW Plug & Play double connector
• High-quality fiberglass membrane
• Peripheral butyl surround
• Spider long life ”Conex
• 25 mm voice coil on Kapton former
• Neodymium magnet 24.5 x 6 mm
• Thick magnetic circuit (4 mm)

Technical Specifications

• Component Speaker
• Max power 120 W
• Nominal power 60 W
• Impedance 4 Ω
• Freq. Response 100 Hz - 10 KHz
• Sensitivity (2,83V/1m) 88 dB
• Magnet Neodynium
• Magnet size Ø x h 24,5 x 7 mm 0,965‘’x 0,276‘’
• Total driver displacement 0,08 l 0,003 cf
• Weight of one component 0,236 kg 0,520 lb
• Voice coil Ø 25 mm 0,984“
• Voice coil height 5 mm 0,197“
• Cone Glass fiber

Technical Parameters

• effective Ø (d) 83 mm
• Sd 54,11 cm2
• Xmax 1,00 mm
• Re 3,0 Ω
• Fs 116,99 Hz
• Le 34,23 µH @ 1 kHz
• L2 87,11 µH @10 kHz
• Vas 1,17 L
• Mms 6,52 g
• Cms 0,000284 m/N
• BL 2,87 Tm
• Qts 1,13
• Qes 1,75
• Qms 3,20
• Sensitivity (dB/W/m) 83,2 dB

Are 10cm/ 4 inch speakers good for my vehicle?

4-inch or 10cm speakers are a compact audio solution that delivers impressive sound quality in a small package. Ideal replacements in popular smaller 3-door cars like the Vauxhall Corsa D and select Alfa Romeo, Fiat, and BMW, these lightweight speakers can easily be installed in rear doors, ensuring an unobtrusive fit. Despite their size, they produce powerful and immersive audio, making them perfect for music lovers who seek clarity without the bulk of larger equipment. Whether you're upgrading your vehicle's sound system or simply looking to reduce the size of your car audio set up, 4-inch speakers provide a remarkable audio experience that doesn’t compromise on performance.

What size speakers are in my car? 

If your unsure what speakers fit your car we would recommend using our market-leading Search By Car feature

Dimensions

Note: This item/pack is sold as a pair and contains 2 speakers.