Topic: diff kind of subs

[skylark]

Mga Sir ano po ba mga klase ng Sub i read diff kind ano po ba pag kakaiba ng mga 2

Thank's God Bless to all 

[Speaker Doctor]

What is a subwoofer

Years ago, consumer level home music system loudspeakers had a tweeter for high frequencies, a midrange speaker and a woofer for low frequencies inside one speaker cabinet. Two such cabinets comprised a stereo loudspeaker system usually driven by a receiver or amplifier. Today we have, for the most part,  left the high frequency tweeter and the midrange speakers alone in their cabinet and removed the bass or low frequency speaker and put it in its own cabinet. The technical and acoustical reasons for doing this are a subject for a more advanced audio discussion. Suffice it to say that the very low bass sounds now come from a stand-alone speaker cabinet with large speaker drivers.

Subwoofers are large loudspeakers designed to reproduce only the lowest bass booms and roars in music or movie soundtracks. They are generally composed of a large speaker or "driver" (speaker cone, magnet assembly, and frame) inside a cabinet. Circuitry inside the subwoofer called a "crossover" limits the incoming audio signals allowing the subwoofer to produce only low frequencies.

TYPES OF SUBWOOFERS

There are two basic kinds of subwoofers: Powered and Passive.

Powered subwoofers have a built-in amplifier driving the speaker.

Dolby Digital and DTS systems recommend a
Powered subwoofer.

A powered subwoofer is a box style speaker containing a woofer for bass & an amplifier for the most impressive sounding bass available.

Unlike passive subwoofers, powered subwoofers are self powered & add depth to a system by using their own power rather than power from a receiver. The bigger the woofer the deeper the bass, the more powerful the amplifier, the louder the bass. A powered subwoofer will add bass and power to any system & can be connected to any stereo or surround sound system by using speaker wire or a subwoofer output located on the back of most receivers. Powered subwoofers are recommended in Dolby Digital/DTS Systems if you wish to hear the full effects of Dolby Digital and DTS.


Passive Subwoofers

A passive subwoofer is a box style speaker containing a woofer for bass.

When connected to a receiver, a passive subwoofer like most  traditional speakers, uses the power from a receiver to add bass to a system. The bigger the woofer the deeper the bass. A passive sub can add bass to any system and can be connected to any stereo or surround sound system by using speaker wires. A passive subwoofer may only be connected to a receiver's speaker terminals, it can not be connected to the subwoofer out RCA plug on the back of receivers.

Passive subwoofers have no built-in power source, as they use amplification from your A/V receiver, as your other speakers do. Passive subwoofers are generally not universal. They will only work with the matching satellite speakers.

It's easy to tell the difference: look for a power cord.

 

[av_phile1]

There are also subwoofer types based on the kind of enclusure design used. You have ported, sealed, and band-pass types Check them out here:

http://www.crutchfieldadvisor.com/ISEO-rgbtcspd/learningcenter/car/subwoofers_enclosures.html

And ported types can also come in sub-types using passive radiators, rear or front ported.

Among powered subwoofers,  there are subs using either conventional power amps or digital amps.   They can also come using single driver or multiple drivers.

There's also front-firing, rear-firing , floor-firing and side-firing subwoofers based on the direction of their active drivers.  (though I have yet to see a top-firing one.  )   A google search may yield more information.

[arthurallanj]

I hope this helps: 


http://www.diysubwoofers.org/

[Brian_mico]

There are also subwoofer types based on the kind of enclusure design used. You have ported, sealed, and band-pass types Check them out here:

http://www.crutchfieldadvisor.com/ISEO-rgbtcspd/learningcenter/car/subwoofers_enclosures.html

And ported types can also come in sub-types using passive radiators, rear or front ported.

Among powered subwoofers,  there are subs using either conventional power amps or digital amps.   They can also come using single driver or multiple drivers.

There's also front-firing, rear-firing , floor-firing and side-firing subwoofers based on the direction of their active drivers.  (though I have yet to see a top-firing one.  )   A google search may yield more information.

sir what are the differences of these rear, front,  side and floor firing.. may pagkakaiba ba sa sound quality

[av_phile1]

I haven't done any serious comparison to make any informed assessment of these.   I just leave it to the brand's design and recommendations on what firing position their product would sound best.   From a theoretical point, I don't see any real preference which firing posiiton is best.  Subwoofer frequencies are supposed to be non-directional, so it shouldn't matter from what direction the sub driver is fired.    But based on some design philosphy used, it might matter.  My only concern is with floor-firing subs -  the driver is going against the force of gravity at half the waveform cycle. 

[audibleillusions]

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sir subukan nyo lang as ref

http://www.subwoofers.cc/HomeAud/information/submanual/oldsub_manual.htm#woofer