iphone SPL read 70 dB , while AVR channel setup to 10dB - AVS Forum
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Old 07-26-2012, 04:30 AM - Thread Starter
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Hi guys,


i want to setup my AVR 158 correctly with Harman speakers HKTS60,

well my room is 7 by 3 meter and im setting betweel 2 walls about 1.5 metter.

i setup each channel 10dB and sound volume to 12dB, my iphone read 70dB! so what is the correct reading should i get?

my main problem when i watch BD-Movies i have issue hearing conversion so i raise the volume suddenly explosion or sound effect will shake the room,

can you give me solution to my issue?

my crossover set yo 120Hz , do i need to configure room distance in the AVR?
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Old 07-26-2012, 06:08 AM
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As noted in the 158 Owner's manual (p. 18), while seated in the main listening position, you want the volume level of each speaker to be adjusted so the SPL meter reads 75db. Either your speakers are very inefficient, or they are simply too small for your large listening area.

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Old 07-26-2012, 07:46 AM
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All readings in db (decibels) are referenced against some standard volume or power level, but without knowing the details of the standard used, they cannot be compared to each other.

The settings of the receiver are rather arbitrary, and have very little to do with the sound level (SPL) in the room.

Just set it up so it sounds right to you, and don't concern yourself with numbers.

I am guessing that 80 Hz may be a better setting for your speakers, but the specs I could find are very sketchy, and don't give enough details to be sure. I would try it.
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Old 07-26-2012, 08:05 AM - Thread Starter
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i hope this small sketch will give u good idea



and this is the speaker home page: http://uk.harmankardon.com/harman-kardon-product-detail-uk/hkts-60.html
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Old 07-26-2012, 11:00 AM
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Your receiver volume and your speaker volume at your listening position are not absolutely related. Nothing is wrong with your setup, if you walk further away from a speaker the SPL will go lower.

Also, do not worry about having all your speakers normalized to some "standard" like 75dB. All that matters is that they are at the same level when each channel is played.
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Old 07-26-2012, 11:48 AM
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Considering the AVR's test tone is put out at 75db ..... seems like a "known" standard.

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Old 07-26-2012, 01:57 PM
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Quote:
Originally Posted by jdsmoothie View Post

Either your speakers are very inefficient, or they are simply too small for your large listening area.

The speakers are sensitivity 83db. Pretty inefficient compared to what most people are using.

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