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LG soundbar NB3530A (300w version) anyone got one?


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Old 24-05-2015, 17:02
Lidtop2013
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Just wanted some opinions if anyone's got this soundbar or a similar LG soundbar?

They are currently selling for £139 in currys which I think is brilliant for a 300w soundbar with wireless sub and bluetooth.

Thanks
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Old 24-05-2015, 18:53
chrisjr
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Hmmm 300W when the power consumption is 40W??? How does that work then? Someone at LG obviously didn't do physics at school.
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Old 24-05-2015, 19:13
grahamlthompson
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Hmmm 300W when the power consumption is 40W??? How does that work then? Someone at LG obviously didn't do physics at school.
By virtue of a little and very common exaggeration. Normally power output is measured as a continuous sustained RMS output which basically enables AC power output to be be directly related to DC power.

Power can also be measured as a peak value that can't be sustained (Peak)

Audio reproduction TBH is not normally required to sustain the quoted power output for long periods. The power supply can store enough energy to deliver short bursts of energy at the sort of power that even very expensive AV kit quote. RMS is the average power, transient power delivery is very much higher.
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Old 24-05-2015, 19:28
chrisjr
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By virtue of a little and very common exaggeration. Normally power output is measured as a continuous sustained RMS output which basically enables AC power output to be be directly related to DC power.

Power can also be measured as a peak value that can't be sustained (Peak)

Audio reproduction TBH is not normally required to sustain the quoted power output for long periods. The power supply can store enough energy to deliver short bursts of energy at the sort of power that even very expensive AV kit quote. RMS is the average power, transient power delivery is very much higher.
Well considering they quote the power output of the soundbar as 80+80W at 1kHz 10% distortion I suspect they are measuring RMS. Similarly the sub is rated 140W at 60Hz 10% distortion, which again suggests RMS.

Interestingly both the soundbar and sub are rated as 40W power consumption.

But as is normal with most kit of this type the power rating is probably a work of fiction anyway.
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Old 24-05-2015, 19:43
Nigel Goodwin
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Well considering they quote the power output of the soundbar as 80+80W at 1kHz 10% distortion I suspect they are measuring RMS. Similarly the sub is rated 140W at 60Hz 10% distortion, which again suggests RMS.

Interestingly both the soundbar and sub are rated as 40W power consumption.

But as is normal with most kit of this type the power rating is probably a work of fiction anyway.
Entirely

You can tell how accurate the power ratings are by how loud they are, which usually isn't very
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Old 24-05-2015, 19:53
grahamlthompson
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Entirely

You can tell how accurate the power ratings are by how loud they are, which usually isn't very
Loudspeaker efficiency plays a massive role. A 15W/channel amp feeding large efficient speakers will be very much louder than a much larger amplifier feeding tiny fully sealed bookshelf speakers.
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Old 24-05-2015, 20:25
Nigel Goodwin
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Loudspeaker efficiency plays a massive role. A 15W/channel amp feeding large efficient speakers will be very much louder than a much larger amplifier feeding tiny fully sealed bookshelf speakers.
Obviously - but when the '300W' amplifier is only 20W (or less), that plays a massive part as well

As I'm sure you know, you need ten times the power to be twice as loud.

Probably more of a problem though is headroom, an underpowered amp soon fails to keep up - and the 10% distortion rating is horrible.
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Old 24-05-2015, 22:39
Lidtop2013
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Loudspeaker efficiency plays a massive role. A 15W/channel amp feeding large efficient speakers will be very much louder than a much larger amplifier feeding tiny fully sealed bookshelf speakers.
Hello mate, I'm in Church Hill, small world isn't it

Been into Apollo2000 store, they've got some seriously nice tv's and av goodness in there now, it's no RicherSounds but they do have some good stuff.
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Old 24-05-2015, 22:48
grahamlthompson
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Obviously - but when the '300W' amplifier is only 20W (or less), that plays a massive part as well

As I'm sure you know, you need ten times the power to be twice as loud.

Probably more of a problem though is headroom, an underpowered amp soon fails to keep up - and the 10% distortion rating is horrible.
I suspect your obviously will not be obvious to 99% of anyone reading this thread ''

Again you post information which fails to identify the difference, the entire point of my post, was that you do not need 10X times the power if you connect any amplifier to a loudspeaker system that has more than 10 x times the gain. Considering the massive difference between a very old fashioned large speaker system and the very large power increases required to drive modern tiny speaker systems, which largely require a separate subwoofer with it's own amplifier to replace the very much higher power output to reproduce low frequency content.

Headroom is clearly also related to the efficiency of the connected speakers,.

I don't disagree with your point, except technically it ignores the real reasons why poor quality kit fails to deliver. Connect one to a decent full range speaker system I guess it would sound a lot better.
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