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21 Feb

Passive Subwoofer

Passive Subwoofer
Replace active (powered) subwoofer speaker with passive speaker?

I need to replace the speaker in my powered subwoofer (amp is okay). Is there any difference between passive and active (powered) as far as the speaker/driver is concerned?

The short answer to your question is no. However, when replacing any woofer you have to match it's parameters to the original within tolerances. The first consideration is impedance. If the impedance of the replacement driver is too low the amp can be damaged. The next consideration, no less important, is the TS (Thiele / Small) parameters, if these do not match closely the sound quality will suffer, sometimes greatly. It is unlikely that you will be able to find out what the TS parameters are for the original driver so my best advice is to get a replacement driver from the manufacturer.

http://en.wikipedia.org/wiki/Thiele/Small

SAMSUNG PS WZ420 PASSIVE SUBWOOFER FOR SPEAKER SYSTEM BLACK SUB FOR SYSTEM
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KLH Audio Systems 9520 21 Simulated Surround Sound Passive Subwoofer Black 175w
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Paypal   US $20.00
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Paypal   US $59.95
PANASONIC SB HW560 HOME THEATER PASSIVE SUBWOOFER SC PT960 SC PT760 SC PT770
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Paypal   US $20.09
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Paypal   US $16.05
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DBX db SW 2x6 Passive Cabinet SUBWOOFER SPEAKER SYSTEM SPEAKERS are about 6
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Paypal   US $149.95
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iHome iP15W LED Color Changing Stereo System with Passive Subwoofer for iPhone and iPod iHome iP15W LED Color Changing Stereo System with Passive Subwoofer for iPhone and iPod
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Add excitement and color to your music with the iP15. 7 different cabinet colors can be selected, or set to change randomly. Color can also be selected to pulse to the beat of music. Reson8 speaker technology with a passive subwoofer provides great stereo sound...


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The 118S subwoofer features a single 18-inch transducer with a cast aluminum frame that is designed for added strength and reliability. This exceptional subwoofer employs a 3-inch voice coil for sustained high power handling capability--the largest in its class! With a frequency response of 38Hz to 500Hz, the 118S is rated at 1000 watts and can provide ample low-end fullness for a wide variety of SR applications.


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A colorful way to enjoy your favorite tunes, the iHome iH15W is a compact, illuminated cube and iPod speaker dock. Set it to one color to match your mood, or cycle through the colors for a little fun. Give your favorite music a little color...


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This Pyle Red Label passive subwoofer doesn’t just blow your bass out of this world – it’s a conversation piece, too. It looks like a nitrous tank, but contains an 8” high power subwoofer constructed from a high quality poly mica cone! It’s equipped with non-fatiguing butyl rubber surround for a distortion-free sound, and the 2” high temperature aluminum voice coil provides booming lows...


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Fill the room with deep, thrilling bass. The 180 watt SA-W3000 performance line subwoofer is the perfect companion to your surround sound system. Feel the power of 180 amplified watts of pure bass. The SA-W3000 performance line subwoofer makes music come alive and elevates the movie-watching experience to theater-like levels...


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Descended directly from the original Bass Tubes Enclosure, the BT6014 is the perfect solution to the lack of bass in vehicles with challenging space requirements. Don't let it's small size fool you. With a 6-inch, high power handling woofer, it can restore that missing low end in your system, without sacrificing that precious storage space in your trunk...


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OSD Audio Subwoofers - Powered Vs. Passive