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  1. Home
  2. Car Audio & Electronics
  3. Car Speakers
  4. Car Speaker Packages & Bundles

Car Speaker Packages & Bundles for your 2004 645Ci close

Get a car speaker package that includes multiple sets of speakers and/or speakers with harnesses, adapters or even an amplifier included.

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Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
Design
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
  Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
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JBL Stage3 427F (Stage 3 427F) (2-Pairs, 4-Total)

600Peak (120W RMS) 4" Stage 3 Series 2-Way Coaxial Car Speakers (2-Pairs)

STAGE3427FAM_2 big
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JBL Stage3 427F (Stage 3 427F) (2-Pairs, 4-Total)

600Peak (120W RMS) 4" Stage 3 Series 2-Way Coaxial Car Speakers (2-Pairs)

• 150 watts Peak Each, 30 watts RMS Each
• 3/4" Edge-driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB

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List price $179.90
-22% $139.90

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• 150 watts Peak Each, 30 watts RMS Each
• 3/4" Edge-driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB

Select Increments Versa-Pods (52308) with NSP4

Empty Pair 4" Universal Speaker Pods with Coaxial Car Speakers

SI-52308N big
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Select Increments Versa-Pods (52308) with NSP4

Empty Pair 4" Universal Speaker Pods with Coaxial Car Speakers

• Empty Single 4" Universal Speaker Pods
• Durable ABS plastic enclosure construction
• Versatile use for cars, motorcycles, and extreme terrain vehicles
• with 4" Coaxial Car Speakers

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26
List price $179.94
-8% $164.94

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• Empty Single 4" Universal Speaker Pods
• Durable ABS plastic enclosure construction
• Versatile use for cars, motorcycles, and extreme terrain vehicles
• with 4" Coaxial Car Speakers

JBL Club 422F (2-Pairs, 4-Total)

420W Peak (140W RMS) 4" Club Series 2-Way 3-Ohms Coaxial Car Speakers (2-Pairs)

CLUB422FAM_2 big
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JBL Club 422F (2-Pairs, 4-Total)

420W Peak (140W RMS) 4" Club Series 2-Way 3-Ohms Coaxial Car Speakers (2-Pairs)

• 105 watts Max Each, 35 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB @ 2.83V
• Mounting Height: 0.604"

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List price $259.90
-46% $139.98

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• 105 watts Max Each, 35 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB @ 2.83V
• Mounting Height: 0.604"

Select Increments Versa-Pods (52308k)

Universal-fit speaker pods with 4" Kicker speakers

si-52308k big
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Select Increments Versa-Pods (52308k)

Universal-fit speaker pods with 4" Kicker speakers

• Designed for 4" Speakers
• Universal-fit
• Includes Two Enclosures
• Includes One Pair of Kicker 4" Speakers

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List price $194.94
-5% $184.94

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• Designed for 4" Speakers
• Universal-fit
• Includes Two Enclosures
• Includes One Pair of Kicker 4" Speakers

NVX NSP4 (2-Pairs, 4-Total)

600W Peak (200W RMS) 4" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters (2-Pairs)

NSP4_2 big
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NVX NSP4 (2-Pairs, 4-Total)

600W Peak (200W RMS) 4" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters (2-Pairs)

• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 1.88"

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List price $119.98
-29% $85.48

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• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 1.88"

Polk Audio DB402 Two Pack (DB 402)

Two Pair of 4" 2-way DB+ (Plus) Series Coaxial Car Audio Speakers with Marine/ATV/UTV Certification

DB402 2 Pack big
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Polk Audio DB402 Two Pack (DB 402)

Two Pair of 4" 2-way DB+ (Plus) Series Coaxial Car Audio Speakers with Marine/ATV/UTV Certification

• Two Pair (4 Speakers)
• 135 Watts Max Each, 45 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.79"

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List price $199.98
-10% $180.00

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• Two Pair (4 Speakers)
• 135 Watts Max Each, 45 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 90dB
• Mounting Depth: 1.79"

Alpine S2-S40C 2 Pairs (4 Total)

140W Peak (45W RMS) 4" Next-Generation S-Series 2-way Component Speaker (2-Pairs)

S2S40C_2 big
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Alpine S2-S40C 2 Pairs (4 Total)

140W Peak (45W RMS) 4" Next-Generation S-Series 2-way Component Speaker (2-Pairs)

• 140 watts Peak Each, 45 watts RMS Each
• 3/4" Cloth Soft Dome Tweeters
• Interlaced Carbon-Glass Fiber Composite - IMPP cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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List price $360.00
-17% $299.90

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• 140 watts Peak Each, 45 watts RMS Each
• 3/4" Cloth Soft Dome Tweeters
• Interlaced Carbon-Glass Fiber Composite - IMPP cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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Memphis SRXP82V2 (Pair, 2-Total)

700W Peak (350W RMS) 8" Street Reference Pro Series Mid-Range Speaker with RGB LED Lighting (Pair)

SRXP82V2_2 big
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Memphis SRXP82V2 (Pair, 2-Total)

700W Peak (350W RMS) 8" Street Reference Pro Series Mid-Range Speaker with RGB LED Lighting (Pair)

• 350 watts Peak, 175 watts RMS
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 95 dB

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• 350 watts Peak, 175 watts RMS
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 95 dB

Alpine S2-S40 (2-Pairs, 4-Total)

560W Peak (180W RMS) 4" S-Series 2-way Coaxial Car Speakers (2-Pairs)

S2S40_2 big
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Alpine S2-S40 (2-Pairs, 4-Total)

560W Peak (180W RMS) 4" S-Series 2-way Coaxial Car Speakers (2-Pairs)

• 140 watts Peak Each, 45 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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List price $260.00
-15% $219.90

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• 140 watts Peak Each, 45 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

Alpine S2-S80C (2-Pairs, 4-Total)

1040W Peak (340W RMS) 8" S-Series 2-way Component Speaker System (2-Pairs)

S2S80C_2 big
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Alpine S2-S80C (2-Pairs, 4-Total)

1040W Peak (340W RMS) 8" S-Series 2-way Component Speaker System (2-Pairs)

• 260 watts Peak Each, 85 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 80 dB

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List price $580.00
-17% $479.90

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• 260 watts Peak Each, 85 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 80 dB

Infinity REF407F (2-Pairs, 4-Total)

420W Peak (140W RMS) 4" Reference Series 2-way 3-ohm Coaxial Speakers (2-Pairs)

REF407F_2 big
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Infinity REF407F (2-Pairs, 4-Total)

420W Peak (140W RMS) 4" Reference Series 2-way 3-ohm Coaxial Speakers (2-Pairs)

• 105 watts Peak Each, 35 watts RMS Each
• 1/2" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

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List price $279.90
-21% $219.90

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• 105 watts Peak Each, 35 watts RMS Each
• 1/2" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

NVX VSP4 (2-Pairs, 4-Total)

900W Peak (300W RMS) 4" V-Series 2-Way Coaxial Car Speakers with Silk Dome Tweeters (2-Pairs)

VSP4_2 big
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NVX VSP4 (2-Pairs, 4-Total)

900W Peak (300W RMS) 4" V-Series 2-Way Coaxial Car Speakers with Silk Dome Tweeters (2-Pairs)

• 225 watts Peak Each, 75 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 2.04"

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List price $131.98
-21% $104.48

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• 225 watts Peak Each, 75 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 2.04"

DS18 PRO-X8.4BMPK (2-Pairs, 4-Total)

2200W Peak (1100W RMS) 8” PRO-X Series High Wattage Mid and High Range Package w/Bullet Tweeter (2-Pairs)

PROX84BMPK_2 big
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DS18 PRO-X8.4BMPK (2-Pairs, 4-Total)

2200W Peak (1100W RMS) 8” PRO-X Series High Wattage Mid and High Range Package w/Bullet Tweeter (2-Pairs)

• 550 watts Max Each, 275 watts RMS Each
• 1" Aluminum Bullet Tweeters
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 103 dB
• Mounting Depth: .27"

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$335.90

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• 550 watts Max Each, 275 watts RMS Each
• 1" Aluminum Bullet Tweeters
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 103 dB
• Mounting Depth: .27"

Cerwin-Vega CVP8 (Pair, 2-Total)

700W Peak (340W RMS) 8” PRO Series Full Range Coaxial Car Speaker (Pair)

CVP8_2 big
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Cerwin-Vega CVP8 (Pair, 2-Total)

700W Peak (340W RMS) 8” PRO Series Full Range Coaxial Car Speaker (Pair)

• 350 watts Peak Each, 170 watts RMS Each
• Impedance: 4 ohm
• Sensitivity: 95 dB

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• 350 watts Peak Each, 170 watts RMS Each
• Impedance: 4 ohm
• Sensitivity: 95 dB

JBL CLUB 44F (2-Pairs, 4-Total)

420W Peak (210W RMS) 4" Club Series 3-ohms 2-way Coaxial Car Speakers (2-Pairs)

CLUB44F_2 big
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JBL CLUB 44F (2-Pairs, 4-Total)

420W Peak (210W RMS) 4" Club Series 3-ohms 2-way Coaxial Car Speakers (2-Pairs)

• 105 watts Peak Each, 35 watts RMS Each
• Silk Dome Tweeters
• Injection Molded Polypropylene with UV Protection cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB

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List price $259.90
-23% $199.90

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• 105 watts Peak Each, 35 watts RMS Each
• Silk Dome Tweeters
• Injection Molded Polypropylene with UV Protection cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB

DS18 PRO-X8.4BM with Speaker Installation Kit

Includes: (2) 8” Mid-Range Loudspeaker, 2 Piece Silicone Rubber Speaker Ring Kit, Sound Damping Kit, Installer Panel Removal Tool Kit, Rubber Roller

(2) PRO-X8.4BM, XBAF8, SDRLR1, SDSK2, BTK106 big
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DS18 PRO-X8.4BM with Speaker Installation Kit

Includes: (2) 8” Mid-Range Loudspeaker, 2 Piece Silicone Rubber Speaker Ring Kit, Sound Damping Kit, Installer Panel Removal Tool Kit, Rubber Roller

• 500 watts Peak
• 275 watts RMS
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 96 dB
• Mounting Depth: 3.11"

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List price $224.61
-16% $187.71

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• 500 watts Peak
• 275 watts RMS
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 96 dB
• Mounting Depth: 3.11"

Cerwin Vega CVMPCL8.0 (Pair, 2-Total)

800W Max (400W RMS) 8" Stroker Pro Series Coaxial Car Speaker (Pair)

CVMPCL80_2 big
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Cerwin Vega CVMPCL8.0 (Pair, 2-Total)

800W Max (400W RMS) 8" Stroker Pro Series Coaxial Car Speaker (Pair)

• 400 watts Peak Each, 200 watts RMS Each
• Impedance: 4 ohm
• Sensitivity: 95 dB

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• 400 watts Peak Each, 200 watts RMS Each
• Impedance: 4 ohm
• Sensitivity: 95 dB

4) Rockford Fosgate P1T-S 1" 240 Watt Dome Tweeter Systems

240W Peak (120W RMS) 1" Punch Series Car Tweeters Kit Package

P1T-S 2 Pack big
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4) Rockford Fosgate P1T-S 1" 240 Watt Dome Tweeter Systems

240W Peak (120W RMS) 1" Punch Series Car Tweeters Kit Package

1" Punch Series Car Tweeters Kit • 60 Watts RMS Each • Butyl Rubber Surround • PEI Dome Tweeter • Discreet Dual Clamp Tweeter Mounting • Recessed Tweeter Mount

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$179.98

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1" Punch Series Car Tweeters Kit • 60 Watts RMS Each • Butyl Rubber Surround • PEI Dome Tweeter • Discreet Dual Clamp Tweeter Mounting • Recessed Tweeter Mount

Cerwin Vega XED42 (2-Pairs, 4-Total)

1000W Peak (80W RMS) 4" XED Series 2-Way Coaxial Car Speakers(2-Pairs)

XED42_2 big
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Cerwin Vega XED42 (2-Pairs, 4-Total)

1000W Peak (80W RMS) 4" XED Series 2-Way Coaxial Car Speakers(2-Pairs)

• 250 watts Peak Each, 20 watts RMS Each
• 1" Metallic Dome Tweeters
• Curvilinear polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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• 250 watts Peak Each, 20 watts RMS Each
• 1" Metallic Dome Tweeters
• Curvilinear polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Hertz SV 200L (2-Pairs, 4-Total)

2000W Peak (1000W RMS) 8" SPL Show Series 4-ohm component woofers (2-Pairs)

SV200L_2 big
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Hertz SV 200L (2-Pairs, 4-Total)

2000W Peak (1000W RMS) 8" SPL Show Series 4-ohm component woofers (2-Pairs)

• 500 watts Peak Each, 250 watts RMS Each
• Pulp cotton fiber cone material
• Impedance: 4 ohm
• Sensitivity: 94.5 dB

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• 500 watts Peak Each, 250 watts RMS Each
• Pulp cotton fiber cone material
• Impedance: 4 ohm
• Sensitivity: 94.5 dB

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    All About Car Speaker Packages & Bundles

    Speaker Packages & Bundles

    This speaker packages and bundles category to help you find bonus deals with extra items included to help make your installation of car speakers even easier. You can get adapter mounting brackets, speaker wire, harnesses to eliminate cutting your factory wires

    Most car manufacturers come with stock sound systems that lack power and quality. The most common way people upgrade their car stereos is by installing a new head unit.  This is the in-dash component that allows you to control everything from CDs, AM/FM radio, communication and sometimes vehicle climate control. 

    Amplifiers and subwoofers are necessary to increase the power of the audio system and maintain music fidelity. The amplifier that comes in most head units cannot power upgraded speakers. To get these features while keeping enough energy flowing to the speakers, an amplifier will be needed to ensure each component is getting enough power. Especially if you want to add an aftermarket subwoofer or any specialized speaker. 

     A set of subs increases the base output. Most people associate these with loud music that rattles the bumper – which subwoofers are more than capable of generating. Even so, subs were created to make low frequency sounds that mid-range and factory speakers can’t. You can crank up the bass for a chest thumping experience, or to bring new depth to any musical genre. 

    Replacing the main speakers with excellent tweeters provides the same boost in power and quality for high frequencies.

    Coordinating all the different components necessary to upgrade your car stereo can be tedious. This category is dedicated to packages Sonic Electronix has created to match your desired amplifier and subwoofer, subwoofer and its enclosure, head units and backup cameras, and so on. There are also premium car audio kits that come with a new stereo, subwoofer and speaker box, front speakers, amp, and all the necessary wiring. 

    Sonic Electronix Learning Center: Quick Guide to Car Audio.

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    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
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    Shop your 2004 645Ci
    Why Use a Vehicle Fit Guide?
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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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