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BMW X4

BMW X4 (2014–2021)

What the BMW X4 takes: speaker sizes per position, the adapters you need and the installation parts that fit this generation.

Other generations of the X4

Speaker sizes for the BMW X4

Front doors

Dedicated kits for this car

Showing 12 of 18.

Or choose by size

  • 100 mm component · front door
Component speakers that fit

Rear doors

Dedicated kits for this car

Or choose by size

  • 100 mm coaxialcomponent · rear door
Coaxial speakers that fit Component speakers that fit

Under the seat

Dedicated kits for this car

Car Speakers

Dedicated to this car

Check the fit

High-level input not listed

VIBE

Vibe OPTISOUNDBMW84-V3 8" (20cm)

20 cm (8") · 115 W

In stock · Last pieces: 4

€223.63

Car Speakers

Dedicated to this car

Check the fit

High-level input not listed

MB QUART

MB Quart QMB200W 20 cm subwoofer

20 cm (8") · 180 W

In stock · Last pieces: 2

€303.92

  • -12%

Car Speakers

Dedicated to this car

Check the fit

High-level input not listed

VIBE

Vibe BMW Pack Basic/HiFi 20 cm speakers

20 cm (8") · 115 W

Backorder

€811.17 -12%

€711.56

Previous list price: €811.17

Showing 12 of 16.

Speakers made for this car

Packages

See all (2)

Sound deadening for your car

Four ready-made kits, built for your car from CTK materials: less road noise, less rattle, a calmer cabin and a cleaner base for your audio system.

Classic

The sensible start: tames panel rattle and the worst of the road noise.

€356.16 €374.91

Kit price, 5 % off while the kit stays in your cart.

What is in the kit
Doors
The doors carry your speakers and let in road and wind noise; a damped door gives tighter bass and a quieter ride.
Roof
A large, thin panel that drums in rain and carries road noise and heat into the cabin.
Floor
Where most road and tyre noise comes in; treating it lowers the noise level the most.
Trunk and rear deck
Cuts boom and rattle from the rear and from subwoofers, and keeps exhaust noise out.
Get an installation quote

Standard

A clear step up: damping plus thermal insulation and a sound-absorbing layer in the doors.

€684.25 €720.26

Kit price, 5 % off while the kit stays in your cart.

What is in the kit
Doors
The doors carry your speakers and let in road and wind noise; a damped door gives tighter bass and a quieter ride.
Roof
A large, thin panel that drums in rain and carries road noise and heat into the cabin.
Floor
Where most road and tyre noise comes in; treating it lowers the noise level the most.
Trunk and rear deck
Cuts boom and rattle from the rear and from subwoofers, and keeps exhaust noise out.
Get an installation quote

Premium

The complete treatment: thicker damping and a full insulation stack for a noticeably quieter cabin.

€897.10 €944.32

Kit price, 5 % off while the kit stays in your cart.

What is in the kit
Doors
The doors carry your speakers and let in road and wind noise; a damped door gives tighter bass and a quieter ride.
Roof
A large, thin panel that drums in rain and carries road noise and heat into the cabin.
Floor
Where most road and tyre noise comes in; treating it lowers the noise level the most.
Trunk and rear deck
Cuts boom and rattle from the rear and from subwoofers, and keeps exhaust noise out.
Get an installation quote

Electro On order

The top of the range: our most advanced materials for the quietest cabin and the cleanest audio.

€868.39 €914.10

Kit price, 5 % off while the kit stays in your cart.

What is in the kit
Doors
The doors carry your speakers and let in road and wind noise; a damped door gives tighter bass and a quieter ride.
Roof
A large, thin panel that drums in rain and carries road noise and heat into the cabin.
Floor
Where most road and tyre noise comes in; treating it lowers the noise level the most.
Trunk and rear deck
Cuts boom and rattle from the rear and from subwoofers, and keeps exhaust noise out.
Get an installation quote

Firewall: The wall between engine and cabin. It depends on the car, so we advise you personally. Ask us about it

Suggested extras

CTKROLLER L125 Sound Deadening Roller (€13.74)
CTK Roller (€13.06)
CTK AntiCreak 20×6000 mm (€8.51)
CTK Butyl Headlight Cord 6mm (€14.11)
CTK Defender Butyl Mastic Anti-Corrosion (€21.05)

Adapters you may need

Speaker adapter rings made for this car, for the sizes above.

Direct fit: no adapter rings needed for the dedicated kits above.

See all (1)

Wiring harnesses and ISO adapters

See all (1)

Amplifier and cabling

A plain speaker swap keeps the car's own wiring. Cabling is replaced together with an amplifier: pick the cable by the channels and the power per channel.

For an amplifier shown here no speaker-level (high-level) input is listed in its specs. With a factory head unit without RCA outputs you may need a line output converter (high-low). Line output converters (high-low)

Plug & play amplifier harnesses

See all (7)

Plug & play kits with MUSWAY MPK-BMW2D8 Plug&Play adapter for BMW HK sound systems (length 0.8 m)

Plug & play kits with Musway MPK-BMWD8-RAM Plug & Play adapter for BMW RAM sound systems (length 0.9 m)

Plug & play kits with MUSWAY MPK-BMWD8-RAM-HK Plug&Play adapter for BMW HK RAM (length 0.9 m)

Plug & play kits with MUSWAY MPK-BMWM6 Plug & Play adapter for BMW HiFi systems (length 0.5 m)

Plug & play kits with MUSWAY MPK-BMWM6-RAM Plug&Play adapter for BMW RAM sound systems (0.9 m)

Plug & play kits with MATCH PP-BMW 1.9RAM-HK 9-channel upgrade cable harness

Amplifier channelsPower per channel (RMS) Speaker cablePower cable (short / long run)
2 ≤ 75 W 1.5 mm² 10 mm² / 16 mm²
2 ≤ 150 W 2.5 mm² 10 mm² / 16 mm²
2 > 150 W 4 mm² 10 mm² / 16 mm²
4 ≤ 75 W 1.5 mm² 10 mm² / 16 mm²
4 ≤ 150 W 2.5 mm² 16 mm² / 25 mm²
4 > 150 W 4 mm² 16 mm² / 25 mm²
5+ ≤ 75 W 1.5 mm² 10 mm² / 16 mm²
5+ ≤ 150 W 2.5 mm² 16 mm² / 25 mm²
5+ > 150 W 4 mm² 25 mm² / 35 mm²

Short run: up to 5 m from the battery to the amplifier. The power cable follows the total RMS power of the amplifier.

Amplifiers Amplifier wiring kits Power cable Speaker cable

Not your car? Choose another

What our customers say

4.6 out of 5 on Google · 204 reviews All reviews on Google

I found myself in the neighbourhood the other day and stopped by to ask what my options are for an upgraded head unit for an older car I'm restoring. The guys had a free window of time, they recommended a stereo and got to work right away. They knew exactly what they were doing and 45 minutes later I was on my way, listening to my fav music. Top services, definitely recommended!
Visual Abracadabra, View on Google
"Be Loud!" is probably the most recognised and well known "car tuning" brand in Romania, for its remarcable proffesionals and top notch brands/products that they are providing. Integrated audio sistems, power amps, subwoofers, loudspeakers, navigation systems, for both car and boats and what not, you name it! It is the 3rd time I am doing business with the guys, and each time my expectations were more than fulfilled. As said before, top notch proffesionals, offering custom made solutions, for each and every situation, no matter if you are an audiophile or just an "average Joe" like me. They will provide you with the best possible solution! BIG THANK YOU to Sorin, BIG THANK YOU to Marius, wishing you all the best. See you as soon as possible!
Vlad Tudorache, View on Google
It all started with "let's replace a bad original speaker"... a few visits later I became the proud owner of a fully sound proof car with complete ESX speaker system and top of the line ALPINE audio player. In short this is one of the most professional places I have been with my car. Customer service is simply top notch and the engineers working there are people with proven practical experience. In one word: PROFESSIONALS (Vlad - Peugeot 308 T7)
DT-101 186-RUS, View on Google

A selection of Google reviews (4 and 5 stars). The overall rating above counts all reviews.