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Power my passive subwoofer?

Subwoofer and amp power requirement...?

  • subwoofer and amp power requirement....? am using car amp in my room.Jbl GT-X646 4 channel..two channel bridged and sub using sony xplode XS-GTX120LT ....my room is 10*10*10..sub placed in corner which getting max output..my problems are boomy sound in corner..if not placed in corner then could not hear bass effect...i like very low effect punch without boomy sound like we hear in rock band concerts..am using it combined with sony MHC-GNZ88d dvd component system..problems with phase is there..i tried the polarity changed to correct the phase..but could easily differentiate the bass is from other source than main speakers...polarity change revert the phase or not?am planning to buy class d sony xplode car amp with 300watts output in 4 amps..does it help? present sub-300 watts rms peak 1100 watts 4 ohms 86db/w/m at drivers seat 92db/w/m 30-400 frequency response.. amp bridged output RMS 150 watts connected with PSU of 200 watts.. i dont need a very high volume ...at low or medium volume level need a decent clear sound i need with good punch.. am plannig 2 buy HDAV 1.3 dx from asus + denon av reciever.. i dnt knw which amp and speakers + sub woofers are the best...am planning 2 connect the av reciever analog out put to sony mhc-gnz88d 5.1 channel..+car amp sony class d XM-GTR3301D with Maximum Output Power: 1100W Rated Output Power: 330W x 1 (at 4 ohms) Channel Configuration: 1ch (Mono) Low Pass Filter: 50-300Hz (Variable), 12dB/oct Frequency Response: 10-300kHz MOSFET Power Supply... which subwoofer is good for healthy ultra deep bass effect? this very low frequency giving boomy sound or not?i connected 0.22 mf capcitor in series to input of amp as high pass so that reduction of boomy sound experienced and tight bass felt..not so strenghty..does the subsonic filter reduce the boomy sound?lots of doubts..i dnt have enough cash to experiment each and find out best..but i need a good set up...please help me the xperts to decide a good system set up...mainly subwoofer...if am placing my subwoofer outdoor also need a good bass punch with deep bass...please tell me the specifications of amp and subwoofer.. thank you..

  • Answer:

    Modern speakers are MUCH less efficient than older ones. Why - because the more efficient they are the more distortion they introduce. By making the suspension stiff and damping hard the range and distortion of the speakers is greatly reduced. To compensate for lower efficiency modern amps produce a lot of watts. The problem you are having with boomy sound is because the room is a bad shape and has a strong resonance peak at 225 Hz (and many others). You will not get great sound in a room that shape. Thats why speakers are not cubic - so the sound inside the speaker cabinet has little resonance. Rock concerts take place in large halls so the resoance peaks are at MUCH lower frequencies. All you can do is heavily damp the room at low frequencies, using heavy drapes spaced off the wall. YOU CANNOT IMPROVE THE ACOUSTICS BY CHANGING THE ELECTRONICS!.

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1% of that much power is adequate for a 10 by 10 foot room. Your neighbors will complain if you put your speaker outdoors. Possibly you need response below 30 hertz. Changing the amplifier or the speaker often makes a big difference. You might try modifying your crossover network, if it is accessible. Some blankets or drapes on the walls may help.You likely need a reverberation device to get concert results is a small room. Neil

Ray;mond

1% of that much power is adequate for a 10 by 10 foot room. Your neighbors will complain if you put your speaker outdoors. Possibly you need response below 30 hertz. Changing the amplifier or the speaker often makes a big difference. You might try modifying your crossover network, if it is accessible. Some blankets or drapes on the walls may help.You likely need a reverberation device to get concert results is a small room. Neil

Ray;mond

Modern speakers are MUCH less efficient than older ones. Why - because the more efficient they are the more distortion they introduce. By making the suspension stiff and damping hard the range and distortion of the speakers is greatly reduced. To compensate for lower efficiency modern amps produce a lot of watts. The problem you are having with boomy sound is because the room is a bad shape and has a strong resonance peak at 225 Hz (and many others). You will not get great sound in a room that shape. Thats why speakers are not cubic - so the sound inside the speaker cabinet has little resonance. Rock concerts take place in large halls so the resoance peaks are at MUCH lower frequencies. All you can do is heavily damp the room at low frequencies, using heavy drapes spaced off the wall. YOU CANNOT IMPROVE THE ACOUSTICS BY CHANGING THE ELECTRONICS!.

John

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