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Old 19th December 2012, 02:26 PM   #1
Joseph1 is offline Joseph1  Sri Lanka
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Arrow True RMS - Sony 5.1 System

Guys I'm ready to buy a newer Home Theatre System for this xmas.
My target is this sony product.

DAV-DZ340K : DVD Home Theatre System : Home Theatre System : Sony Asia Pacific

My question is its subwoofer power is RMS 165W.& its total RMS rated as 1000W :O

Is this true?

My goodness in earlier old days 12" woofer 3 way speaker systems doesn't come with this amount of power...!!!!
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Old 19th December 2012, 03:04 PM   #2
zymurgn is offline zymurgn  United States
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Joseph, that total RMS figure is basically just adding all of the outputs together. From those specs, it doesn't look like you will get more than 167W out of any particular channel. I hope that answers your question.
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Old 19th December 2012, 03:09 PM   #3
Joseph1 is offline Joseph1  Sri Lanka
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Quote:
Originally Posted by zymurgn View Post
Joseph, that total RMS figure is basically just adding all of the outputs together. From those specs, it doesn't look like you will get more than 167W out of any particular channel. I hope that answers your question.
Ya I understood.That 1000W is total including all satellites + subwoofer.

Just concentrate on the subwoofer,167W is really a big sound.I still cannot prove does it sounds that much power??Is that instantaneous peak they talking about!!
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Old 19th December 2012, 08:26 PM   #4
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It is a pity that the people at Sony do not use their knowledge to solve the world's energy problems. The power consumption of the entire system is given with 165 W, and it turns out 1000 W to the speakers plus has reserves to power the DVD, tuner, DSP and control sections.

A bit more revealing: the operation manual

Quote:
POWER OUTPUT: Front L/Front R/Center/Surround L/Surround R: 142 W (per channel at 3 ohms, 1 kHz, 10% THD*, 127 V)
Subwoofer: 140 W (at 3 ohms, 80 Hz, 10% THD*, 127 V)
Quote:
POWER OUTPUT (rated):
Front L/Front R/Center/ Surround L/Surround R: 108 W (per channel at 3 ohms, 1 kHz, 1% THD)
Judging from the other channels the subwoofer amp will have something like 100 W at a decent distortion level. That can mean the 180 mm driver is not very efficient. Or it can mean Sony employs equalisation, as they often do, to make their systems sound nicer.

Decide on the woofer you want to use and its design. Then you can find out how much power you really need.

By the way, bigger woofers are easier to drive, so you are right that a classic 12" woofer would not need that much power. Modern long-stroke woofers with heavy membranes for extremely low frequencies from relatively small enclosures change that however.
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Old 19th December 2012, 10:19 PM   #5
Joseph1 is offline Joseph1  Sri Lanka
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Quote:
Originally Posted by pacificblue View Post
It is a pity that the people at Sony do not use their knowledge to solve the world's energy problems. The power consumption of the entire system is given with 165 W, and it turns out 1000 W to the speakers plus has reserves to power the DVD, tuner, DSP and control sections.

A bit more revealing: the operation manual

POWER OUTPUT: Front L/Front R/Center/Surround L/Surround R: 142 W (per channel at 3 ohms, 1 kHz, 10% THD*, 127 V)
Subwoofer: 140 W (at 3 ohms, 80 Hz, 10% THD*, 127 V)

Quote: POWER OUTPUT (rated):
Front L/Front R/Center/ Surround L/Surround R: 108 W (per channel at 3 ohms, 1 kHz, 1% THD)

Judging from the other channels the subwoofer amp will have something like 100 W at a decent distortion level. That can mean the 180 mm driver is not very efficient. Or it can mean Sony employs equalisation, as they often do, to make their systems sound nicer.

Decide on the woofer you want to use and its design. Then you can find out how much power you really need.

By the way, bigger woofers are easier to drive, so you are right that a classic 12" woofer would not need that much power. Modern long-stroke woofers with heavy membranes for extremely low frequencies from relatively small enclosures change that however.
Your details were really made my mind to buy this product.It means the subwoofer will produced 100W roughly which is quiet enough for home audio.

Thanks for your usefull details.
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Old 22nd December 2012, 02:41 PM   #6
Joseph1 is offline Joseph1  Sri Lanka
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Hi pacificblue I bought a new hi-fi setup & not a 5.1 system.

MHC-GZR777D : Mini Hi-Fi System : Hi-Fi System : Sony Asia Pacific

I have a small question.

My new hi-fi stereo has these spec on the manual.

Power Output (Rated)
105 W + 105 W (at 6 Ohms,1Khz, 1%THD)

RMS output (reference)
210 W + 210 W (per channel at 6 Ohms,1Khz)

What is mean by rated & reference? So whats my maximum RMS power!! Is it 105W X 2 or 210W X 2 ?
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Old 22nd December 2012, 03:09 PM   #7
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Default Watt ?

Quote:
Originally Posted by Joseph1 View Post
Guys I'm ready to buy a newer Home Theatre System for this xmas.
My target is this sony product.

DAV-DZ340K : DVD Home Theatre System : Home Theatre System : Sony Asia Pacific

My question is its subwoofer power is RMS 165W.& its total RMS rated as 1000W :O

Is this true?



My goodness in earlier old days 12" woofer 3 way speaker systems doesn't come with this amount of power...!!!!
There we go again , power is no measure for sound pressure . All those watts don't tell you how loud your system will be , Sony does not give any specs on this system about the speakers sensitivity . Seen the picture of the system , it would be 6 or 8 inch drivers or even less , Watts are not important , you need big drivers to move air and that can be done with a couple of watts , dont let the watts adds fool you and read about watts and the decibel scale .

Cheers ,

Rens
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Old 22nd December 2012, 08:09 PM   #8
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Quote:
Originally Posted by Joseph1 View Post
Power Output (Rated)
105 W + 105 W (at 6 Ohms,1Khz, 1%THD)

RMS output (reference)
210 W + 210 W (per channel at 6 Ohms,1Khz)

What is mean by rated & reference? So whats my maximum RMS power!! Is it 105W X 2 or 210W X 2 ?
Rated is the nominal output they have to show in order to not get into trouble with consumer protection organisations.

Reference is what Sony tries to make customers believe they get instead. It is the output power at arbitrary (high) THD. In this case, where it is double as high as the 1 % THD power they are obviously quoting the square wave power. It is best to ignore that power claim. The important thing is that you are happy with the sound quality and the SPL.

Power has little to do with sound quality, and as doctordata writes, the achievable SPL depends on the speaker sensitivity.
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Old 23rd December 2012, 03:58 AM   #9
Joseph1 is offline Joseph1  Sri Lanka
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Quote:
Originally Posted by doctordata View Post
There we go again , power is no measure for sound pressure . All those watts don't tell you how loud your system will be , Sony does not give any specs on this system about the speakers sensitivity . Seen the picture of the system , it would be 6 or 8 inch drivers or even less , Watts are not important , you need big drivers to move air and that can be done with a couple of watts , dont let the watts adds fool you and read about watts and the decibel scale .

Cheers ,
Quote:
Rated is the nominal output they have to show in order to not get into trouble with consumer protection organisations.

Reference is what Sony tries to make customers believe they get instead. It is the output power at arbitrary (high) THD. In this case, where it is double as high as the 1 % THD power they are obviously quoting the square wave power. It is best to ignore that power claim. The important thing is that you are happy with the sound quality and the SPL.

Power has little to do with sound quality, and as doctordata writes, the achievable SPL depends on the speaker sensitivity.
Rens
Hi guys now I understood.Rated is the nominal output.

Yes this has 6.5" woofers.The sound quality is superb.That is too much for a house.
I noticed sony reduces their BASS level when the volume increases to keep the sound smooth.

It has Groove/Z-groove bass boost function.Without that boost this system acts like a basic amp without any pe-amp part & the volume also reduced very noticeably.
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Old 23rd December 2012, 05:32 AM   #10
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LOL. more like 10W pr ch. consumes 165W and give out 1000W? wonder wich calculation they used to get those numbers. where does the system take the rest of the power from? solar panels?
and i realy want to see the 65mm(2.5") driver that can take above 100W input. the whole thing is a joke.

Last edited by AudioSan; 23rd December 2012 at 05:34 AM.
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