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  3. Speakers with Sound Deadening

Speakers with Sound Deadening for your 2001 325Ci close

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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.
PRO-X Series (33)
Reference Series (26)
S Series (16)
Cento Series (14)
Mille Pro Series (12)
Primus Series (12)
V Series (12)
XED Series (12)
A Series (11)
Kappa Series (11)
Polk DB+ Series (11)
N-Series (10)
PNW Series (10)
Punch Series (10)
Prime Series (9)
Zeus Series (9)
ZXI Series (9)
Stage Series (8)
X Series (8)
G-Series (TSG) (7)
Power Series (7)
PRO Series (7)
PRO-SM Series (7)
SPL (7)
Status Series (7)
DRVN Series (6)
Elite Series (6)
GX Series (6)
Premium Series (6)
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Terminator Series (6)
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Uno Series (6)
CS Series (5)
Dieci Series (5)
EQ Series (5)
Formula Series (5)
GS Series (5)
R Series (5)
DMD Series (4)
eXcelon Series (4)
HED Series (4)
PRO-GM Series (4)
PRO-ZT Series (4)
Stroker Pro Series (4)
Apocalypse Series (3)
D-Series (3)
HEX Series (3)
Mille Legend Series (3)
NEO Series (3)
Performance Series (3)
Polk Audio MM1 Series (3)
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CVL Series (2)
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MS Series (2)
MSPRO Series (2)
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Diamond Audio H65A with Sound Damping

300W Peak (150W RMS) 6.5" HEX Series 2-Way Component Speaker System + NVX SDSK2 Sound Damping

H65A_SDSK2 big
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Diamond Audio H65A with Sound Damping

300W Peak (150W RMS) 6.5" HEX Series 2-Way Component Speaker System + NVX SDSK2 Sound Damping

• 150 watts Peak Each, 75 watts RMS Each
• 1" Silk Dome Tweeters
• Anodized Aluminum cone material
• Impedance: 4 ohm
• Sensitivity: 88.3 dB

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48
$784.98

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• 150 watts Peak Each, 75 watts RMS Each
• 1" Silk Dome Tweeters
• Anodized Aluminum cone material
• Impedance: 4 ohm
• Sensitivity: 88.3 dB

Hertz MLK1650.3 with Sound Damping

300W Peak (150W RMS) 6.5" Mille Legend Series 2-Way 4 Ohm component speaker system + NVX SDSK2 Sound Damping

MLK16503_SDSK2 big
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Hertz MLK1650.3 with Sound Damping

300W Peak (150W RMS) 6.5" Mille Legend Series 2-Way 4 Ohm component speaker system + NVX SDSK2 Sound Damping

• 150 Watts Max Each, 75 Watts RMS Each
• Pressed-pulp cone with cotton fibers cone material
• Tetolon Tweeter Dome
• 4 Ohm Impedance
• Sensitivity: 92 dB

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49
List price $2133.74
-10% $1,914.98

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• 150 Watts Max Each, 75 Watts RMS Each
• Pressed-pulp cone with cotton fibers cone material
• Tetolon Tweeter Dome
• 4 Ohm Impedance
• Sensitivity: 92 dB

Alpine S2-S69C with Sound Damping

520W Peak (170W RMS) 6x9" S-Series 2-way Component Speaker System + NVX SDSK2 Sound Damping

S2S69C_SDSK2 big
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Alpine S2-S69C with Sound Damping

520W Peak (170W RMS) 6x9" S-Series 2-way Component Speaker System + NVX SDSK2 Sound Damping

• 260 watts Peak Each, 85 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm

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52
List price $308.74
-17% $254.94

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• 260 watts Peak Each, 85 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm

Alpine S2-S80C with Sound Damping

520W Peak (170W RMS) 8" S-Series 2-way Component Speaker System + NVX SDSK2 Sound Damping

S2S80C_SDSK2 big
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Alpine S2-S80C with Sound Damping

520W Peak (170W RMS) 8" S-Series 2-way Component Speaker System + NVX SDSK2 Sound Damping

• 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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48
List price $308.74
-17% $254.94

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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 Kappa 693M (INFSPKKA693MAM) with Sound Damping

720W Peak (240W RMS) Kappa Series 6x9” 3-Way Speakers + NVX SDSK2 Sound Damping

KAPPA693M_SDSK2 big
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Infinity Kappa 693M (INFSPKKA693MAM) with Sound Damping

720W Peak (240W RMS) Kappa Series 6x9” 3-Way Speakers + NVX SDSK2 Sound Damping

• 360 watts Peak Each, 120 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 94 dB

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54
List price $368.69
-31% $254.94

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• 360 watts Peak Each, 120 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 94 dB

Hertz CX 690 with Sound Damping

600W Peak (200W RMS) 6x9" Cento Series 3-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

CX690_SDSK2 big
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Hertz CX 690 with Sound Damping

600W Peak (200W RMS) 6x9" Cento Series 3-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

• 300 watts Peak Each, 100 watts RMS Each
• 1-5/8 PEI (Polyetherimide) Dome Tweeters
• Semi-pressed paper + Mica cone material
• Impedance: 4 ohm
• Sensitivity: 94.5 dB

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51
List price $413.74
-12% $364.98

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• 300 watts Peak Each, 100 watts RMS Each
• 1-5/8 PEI (Polyetherimide) Dome Tweeters
• Semi-pressed paper + Mica cone material
• Impedance: 4 ohm
• Sensitivity: 94.5 dB

DS18 PRO-X8.4BMRGB (Sold Individually) with Sound Damping

550W Peak (275W RMS) 8” PRO-X Series 4-ohm Mid-Range Loudspeaker with RGB LED Bullet + NVX SDBSK2 Premium Sound Damping

PROX84BMRGB_SDBSK2 big
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DS18 PRO-X8.4BMRGB (Sold Individually) with Sound Damping

550W Peak (275W RMS) 8” PRO-X Series 4-ohm Mid-Range Loudspeaker with RGB LED Bullet + NVX SDBSK2 Premium Sound Damping

• 550 watts Peak Each, 275 watts RMS Each
• Translucid ABS Bullet tweeters
• RGB illumination on tweeters
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 96 dB

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48
List price $96.69
-9% $88.44

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• 550 watts Peak Each, 275 watts RMS Each
• Translucid ABS Bullet tweeters
• RGB illumination on tweeters
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 96 dB

Crunch CS65CXS with Sound Damping

600W Peak (300W RMS) 6.5" CS Series 2-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

CS65CXS_SDSK2 big
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Crunch CS65CXS with Sound Damping

600W Peak (300W RMS) 6.5" CS Series 2-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

• 300 watts Peak Each, 150 watts RMS Each
• 1" Neo-Mylar Soft Dome Tweeters
• Cellulose cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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56
List price $51.73
-13% $44.98

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• 300 watts Peak Each, 150 watts RMS Each
• 1" Neo-Mylar Soft Dome Tweeters
• Cellulose cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Hertz X 165 with Installation Accessories

440W Peak (110W RMS) 6.5” Uno Series 2-way Coaxial Speakers + 6.5" Speaker Baffles + Sound Damping, Roller and Panel Removal Kit

X165_ACC_KIT big
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Hertz X 165 with Installation Accessories

440W Peak (110W RMS) 6.5” Uno Series 2-way Coaxial Speakers + 6.5" Speaker Baffles + Sound Damping, Roller and Panel Removal Kit

• 220 watts Peak Each, 55 watts RMS Each
• 3/4" Neodymium Dome Tweeters
• Water Resistance Paper Cone cone material
• Impedance: 4 ohm
• Sensitivity: 93.5 dB

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263
List price $167.71
-28% $121.25

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• 220 watts Peak Each, 55 watts RMS Each
• 3/4" Neodymium Dome Tweeters
• Water Resistance Paper Cone cone material
• Impedance: 4 ohm
• Sensitivity: 93.5 dB

Diamond Audio DMD653 with Sound Damping

200W Peak (100W RMS) 6.5" DMD Series 3-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

DMD653_SDSK2 big
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Diamond Audio DMD653 with Sound Damping

200W Peak (100W RMS) 6.5" DMD Series 3-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

• 100 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

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48
List price $168.73
-6% $157.98

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• 100 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

Hertz ML1650.3 with Sound Damping

600W Peak (300W RMS) 6.5" Mille Legend Series 4 Ohm Woofers + Grille + NVX SDSK2 Sound Damping

ML16503_SDSK2 big
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Hertz ML1650.3 with Sound Damping

600W Peak (300W RMS) 6.5" Mille Legend Series 4 Ohm Woofers + Grille + NVX SDSK2 Sound Damping

• 600 Watts Max, 300 Watts RMS
• Pressed-pulp cone with cotton fibers cone material
• Neodymium Magnet
• 4 Ohm Impedance
• Sensitivity: 93 dB

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48
List price $1078.74
-6% $1,014.98

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• 600 Watts Max, 300 Watts RMS
• Pressed-pulp cone with cotton fibers cone material
• Neodymium Magnet
• 4 Ohm Impedance
• Sensitivity: 93 dB

Hertz MPX 165.3 with Installation Accessories

400W Peak (200W RMS) 6.5" Mille PRO Series 2-way 4-ohm Coaxial Speakers + 6.5" Speaker Baffles + Sound Damping, Roller and Panel Removal Kit

MPX1653_ACC_KIT big
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Hertz MPX 165.3 with Installation Accessories

400W Peak (200W RMS) 6.5" Mille PRO Series 2-way 4-ohm Coaxial Speakers + 6.5" Speaker Baffles + Sound Damping, Roller and Panel Removal Kit

• 200 watts Peak Each, 100 watts RMS Each
• 1" Tetolon Soft Dome Tweeters
• Pressed Pulp Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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338
List price $557.71
-11% $494.05

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• 200 watts Peak Each, 100 watts RMS Each
• 1" Tetolon Soft Dome Tweeters
• Pressed Pulp Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

DS18 PRO-GM8 with Sound Damping

580W Peak (190W RMS) 8" PRO-GM Series 8-ohm Midrange Car Loudspeaker + NVX SDBSK2 Premium Sound Damping

PROGM8_SDBSK2 big
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DS18 PRO-GM8 with Sound Damping

580W Peak (190W RMS) 8" PRO-GM Series 8-ohm Midrange Car Loudspeaker + NVX SDBSK2 Premium Sound Damping

• 580 watts Peak Each, 190 watts RMS Each
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 93 dB

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48
List price $60.73
-25% $45.44

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• 580 watts Peak Each, 190 watts RMS Each
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 93 dB

Hertz MLK165.3 with Sound Damping

300W Peak (150W RMS) 6.5" Mille Legend Series 2-Way 4 Ohm component speaker system + NVX SDSK2 Sound Damping

MLK1653_SDSK2 big
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Hertz MLK165.3 with Sound Damping

300W Peak (150W RMS) 6.5" Mille Legend Series 2-Way 4 Ohm component speaker system + NVX SDSK2 Sound Damping

• 150 Watts Max Each, 75 Watts RMS Each
• Pressed-pulp cone with cotton fibers cone material
• Tetolon Tweeter Dome
• 4 Ohm Impedance
• Sensitivity: 91 dB

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48
List price $1193.74
-11% $1,064.98

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Only 3 Left!

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• 150 Watts Max Each, 75 Watts RMS Each
• Pressed-pulp cone with cotton fibers cone material
• Tetolon Tweeter Dome
• 4 Ohm Impedance
• Sensitivity: 91 dB

Infinity REF507CF with Sound Damping

390W Peak (130W RMS) 5.25" Reference Series 2-way 4-ohm Component Speaker System + NVX SDSK2 Sound Damping

REF507CF_SDSK2 big
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Infinity REF507CF with Sound Damping

390W Peak (130W RMS) 5.25" Reference Series 2-way 4-ohm Component Speaker System + NVX SDSK2 Sound Damping

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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48
List price $268.69
-13% $234.94

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• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

DS18 PRO-FR69NEO with Speaker Installation Kit

Includes: 6.5” Water resistant Cone Mid-Range Loudspeaker , 2 Piece Foam Speaker Ring Kit, Sound Damping Kit, Installer Panel Removal Tool Kit, Rubber Roller

PRO-CF6.2NR, FRING65, SDRLR1, SDSK2, BTK106 big
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DS18 PRO-FR69NEO with Speaker Installation Kit

Includes: 6.5” Water resistant Cone Mid-Range Loudspeaker , 2 Piece Foam Speaker Ring Kit, Sound Damping Kit, Installer Panel Removal Tool Kit, Rubber Roller

• 200W RMS 6.5” PRO-M Series Water resistant Cone Mid-Range Loudspeaker
• 2 Piece Foam Speaker Ring Kit
• 1.38 Square Feet of Sound Damping
• Installer Panel Removal Tool Kit
• Rubber Roller

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Install kits available for most vehicles

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184
List price $288.66
-11% $256.75

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• 200W RMS 6.5” PRO-M Series Water resistant Cone Mid-Range Loudspeaker
• 2 Piece Foam Speaker Ring Kit
• 1.38 Square Feet of Sound Damping
• Installer Panel Removal Tool Kit
• Rubber Roller

Cerwin-Vega CVP65 with Sound Damping

300W Peak (150W RMS) 6.5" PRO Series Full Range Coaxial Car Speaker + NVX SDSK2 Sound Damping

CVP65_SDSK2 big
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Cerwin-Vega CVP65 with Sound Damping

300W Peak (150W RMS) 6.5" PRO Series Full Range Coaxial Car Speaker + NVX SDSK2 Sound Damping

• 300 watts Peak Each, 150 watts RMS Each
• Impedance: 4 ohm
• Sensitivity: 93 dB

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50
List price $72.73
-18% $59.98

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• 300 watts Peak Each, 150 watts RMS Each
• Impedance: 4 ohm
• Sensitivity: 93 dB

Diamond Audio DES525 with Sound Damping

200W Peak (100W RMS) 5.25" Elite Series 2-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

DES525_SDSK2 big
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Diamond Audio DES525 with Sound Damping

200W Peak (100W RMS) 5.25" Elite Series 2-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

• 100 watts Peak Each, 50 watts RMS Each
• 1" Aluminum Dome Tweeters
• Composite Fiber Weave cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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48
$214.98

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• 100 watts Peak Each, 50 watts RMS Each
• 1" Aluminum Dome Tweeters
• Composite Fiber Weave cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

Infinity Kappa 63XF with Sound Damping

510W Peak (170W RMS) 6.5" Kappa Series 2-Way Coaxial Speakers with Silk Dome Tweeters + NVX SDSK2 Sound Damping

KAPPA63XF_SDSK2 big
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Infinity Kappa 63XF with Sound Damping

510W Peak (170W RMS) 6.5" Kappa Series 2-Way Coaxial Speakers with Silk Dome Tweeters + NVX SDSK2 Sound Damping

• 255 watts Peak Each, 85 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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58
List price $318.69
-33% $214.94

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• 255 watts Peak Each, 85 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Diamond Audio MSPRO65 with Sound Damping

MSPRO Series 6.5" Midrange Motorcycle Speakers 400W RMS, Pair + NVX SDSK2 Sound Damping

MSPRO65_SDSK2 big
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Diamond Audio MSPRO65 with Sound Damping

MSPRO Series 6.5" Midrange Motorcycle Speakers 400W RMS, Pair + NVX SDSK2 Sound Damping

• RMS: 400W / Peak: 800W
• Frequency Response: 110Hz - 10kHz
• Sensitivity: 97dB
• Manufactured to IP65 Marine Grade Compliant Specifications
• Shorting Ring Utilized In Motor Structure For Far-Field Performance

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$294.98

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• RMS: 400W / Peak: 800W
• Frequency Response: 110Hz - 10kHz
• Sensitivity: 97dB
• Manufactured to IP65 Marine Grade Compliant Specifications
• Shorting Ring Utilized In Motor Structure For Far-Field Performance

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    2001 BMW 325Ci

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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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