Package Included

• Phoenix Gold ZDBMW4CS 4” (100mm) 2-Way Component Speaker Kit For BMW
• Stinger RKXSK Expert Sound Proofing Deadening Material 2 Sheet Speaker Kit

ZDBMW4CS

The Phoenix Gold ZDBMW4CS is a 2-way component speaker set designed specifically for BMW vehicles, offering a premium sound upgrade with easy plug-and-play installation. It aims to improve clarity, control, and sound balance by addressing factory system limitations.

The ZDBMW4CS Speaker System Engineered Specifically For BMW Vehicles.

Experience premium sound quality and seamless installation with the Phoenix Gold ZDBMW4CS, a plug-and-play speaker system engineered specifically for BMW vehicles. Designed with sound performance and installation versatility in mind, this kit redefines what a simple upgrade can do.

Engineered for Clarity and Control

The 4” midrange driver features an aluminium cone, chosen for its ability to deliver tight, punchy midbass and clear midrange tone reproduction – perfectly suited to bring vocals and instruments to life with accuracy and fun energy.

The 1” tweeter uses a silk dome to produce soft, smooth high frequencies, offering a refined, natural top end that enhances detail without harshness.

A dedicated 2-way crossover ensures each driver performs at its best, maintaining tonal balance and seamless integration between the midrange, tweeter and vehicle.

Smart Bass Blocker Function

In BMWs with the factory Basic Sound System, the underseat woofers and door speakers share the same signal. This means the small 4″ door speakers are forced to play deep bass tones they weren’t made for — often causing distortion and muddy sound.

The ZDBMW4CS includes an integrated Bass Blocker loop that filters out those low frequencies below 120Hz (-12dB/Oct). By doing this, it stops unwanted bass from reaching the midrange speakers, allowing them to play louder, clearer, and more accurately. The bass is then handled properly by the underseat woofers, giving you a balanced, distortion-free sound.

Precision Engineering Meets Plug & Play Simplicity

The ZDBMW4CS features a dual aluminium mounting bracket system, built for maximum rigidity and zero unwanted vibrations. Its innovative design ensures a perfect fit across multiple BMW configurations, regardless of which of the two OEM brackets your vehicle uses.

Specifications

• Speaker Type: 2-Way Component Set
• Speaker Size: 4” (100mm)
• Frequency Response: 120Hz – 20kHz
• Power Handling (RMS): 60W
• Power Handling (MAX): 120W
• Impedance: 4Ω
• Sensitivity: 86.0dB (1W/1m)
• Voice Coil: 1” (25.5mm)
• Crossover Frequency: 3300Hz (12dB/Oct)
• Unit: Sold as pairs

T/S Parameters

• 3.2 Ohm
• 112 Hz
• 3.634
• 0.793
• 0.653
• 393.054 μM/N
• 1.41 L
• 3.77 N/A
• 52.8 cm²
• 5.07 g

Included in the Box

• 2x 4” Speakers
• 2x 1” Tweeters
• 2x Crossovers
• 4x BMW Mounting Brackets (2 of each)
• 6x Speaker Foam
• 8x Screws
• 1x Manual

Stinger RKXSK Expert Sound Proofing Deadening Material 2 Sheet Speaker Kit

• Expert level sound dampening
• Aluminum outer layer
• Self adhesive
• Easy installation
• Use on all metal panels, doors, roof, floor, firewall & trunk
• Kills panel resonance, squeaks and rattles
• Highest damping vs. weight ratio of any material available
• Improves overall audio frequency response and bass output
• Speaker kit

Expert RoadKill Published Specifications

• Minimum Thickness 0.080in
• Minimum Weight 0.65bs/ft2
• Aluminum Layer- 6 mils

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