Maximise LFE and Bass in Sub woofer less Home Cinema system

anderc02

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Jan 15, 2008
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I am about to recieve a new shiny panasonic DMP BD 85 Blu ray player .Before I commence set up I want to know how do I send LFE /Bass frequencies that would normally be sent to a Sub to my left and right speakers instead and/or my centre speaker ? I am using 5.0 multi channel audio . The Amp is a Sony VA555es
 
I wouldn't know how exactly it works on your receiver but normally all you ahve to do is tell the receiver (somewhere in the sound setup menu) that you are not using a sub (sub 'off' or 'no sub' or similar). It may be part of the initial setup that the receiver may take you through or you may have to go thorugh it manually. The receiver will then send all bass to the front speakers (instead of filtering it out and sending to the LFE out).
 
Not sure if your Sony amp has the same bass management options, but my Denon AV2800 has a menu that allows the LFE channel to be sent to the front speakers for exactly the situation you have. Take a look at the set-up menu and "Bass management" in the Sony.
 
You cant send the LFE to the speakers, its a discrete mono channel that only goes to the sub. In a 5.1 system the entire frequency range is encoded in the 5 normal channels, and the LFE is encoded into the .1 channel. The LFE is 2 or 3 tp 120 hz, but is 10db hot of the normal channels. Without a sub, you still get this content but within the speakers channels and not at the elevated spl level.

If you want to improve the low end bass of the system, your going to need a sub, thats what they do. If you just want to increase the bass you have, you can used tone controls etc, but it will only stress your speakers more. Bass performance in that system would also be highly affected by the choice of speakers. No matter what you do, your system will sound devoid of bass if your only running little sats, but if you have large florr standers you will get a lot of bass from them. Just be careful with the volume controls with films as many have a lot of very low frequency content.
 
moonfly said:
You cant send the LFE to the speakers, its a discrete mono channel that only goes to the sub. In a 5.1 system the entire frequency range is encoded in the 5 normal channels, and the LFE is encoded into the .1 channel. The LFE is 2 or 3 tp 120 hz, but is 10db hot of the normal channels. Without a sub, you still get this content but within the speakers channels and not at the elevated spl level.

If you want to improve the low end bass of the system, your going to need a sub, thats what they do. If you just want to increase the bass you have, you can used tone controls etc, but it will only stress your speakers more. Bass performance in that system would also be highly affected by the choice of speakers. No matter what you do, your system will sound devoid of bass if your only running little sats, but if you have large florr standers you will get a lot of bass from them. Just be careful with the volume controls with films as many have a lot of very low frequency content.

There are some (not many) floorstanders capable of outgunning all but the most esoteric subwoofer setups, for people who run a 2.0 for films is there not another way of getting the "hot" encoded 0.1 channel to run through them? Extening this surely the same could be applied to 5.0? I may WELL be wrong on this.
 
The LFE is a seperate discreet channel, its even encoded seperately on the disc so there isnt really a way around it. Only way with large (and likely very expensive) speakers would be to make the woofer sections active, which if you were running such speakers you would likely have them Bi/tri/amped anyway. You would then send the LFE output to the amp driving the woofer section, assuming the crossovers leant themselves to that setup.

The only way to increase the low end in a 5.0 system would be to increase the sub 120 hz material, either by way of an equalizer or some other form of eq. There will likely be an option for this within your AVR, so it would just be a case of using the available setting to adjust to taste.
 

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