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#149700 - 10/18/06 02:42 PM Using The Radio Shack SPL Meter?
Robot Offline
hobbyist

Registered: 08/24/06
Posts: 24
Hey all,

Before I get my new M60’s, I wanted to make sure I understood how to use this thing properly. The below is instructions were taken from Audioholics:

Quote:

“Place the SPL Meter at the listening position at ear level with the Mic end pointed toward the ceiling. Select “C” weighting, response slow then, turn the dB dial to 70. Activate the internal pink noise generator of your Receiver and select manual test tone. Now adjust each speaker to +75 dB reference. When you are adjusting the surrounds make sure your body is not in a direct path of the speaker and make sure the house is quiet. When doing the calibration, only the test tone should be heard (A/C, ceiling fans, ect. should be turned off). I like to adjust the subwoofer level to + 80dB for wow effect. Your taste may vary.”




What I don’t understand is the +75dB. My receiver (Pioneer ELITE) only goes to +12. What am I missing?

Thanks


Edited by Robot (10/18/06 02:42 PM)
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VP150 / QS8(3) / M60s

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#149701 - 10/18/06 02:43 PM Re: Using The Radio Shack SPL Meter? [Re: Robot]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17751
Loc: NoVA
OK, ignore the volume settings on your receiver. It's talking about the reading of 75 dB on the meter.
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#149702 - 10/18/06 03:08 PM Re: Using The Radio Shack SPL Meter? [Re: Ken.C]
Robot Offline
hobbyist

Registered: 08/24/06
Posts: 24
So where should I set my receiver to test? My reference level is between -10 and -5 on my receiver.
_________________________
VP150 / QS8(3) / M60s

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#149703 - 10/18/06 03:31 PM Re: Using The Radio Shack SPL Meter? [Re: Robot]
WhatFurrer Offline
aficionado

Registered: 12/02/03
Posts: 692
Loc: Round Rock, Texas
Robot,

Set up the meter and then turn the volume up on the reciever so that the left front speaker registers 75 db on the meter...Disregard where the volume control on the reciever is set.

Hope this helps.

WhatFurrer


Edited by WhatFurrer (10/18/06 03:34 PM)
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#149704 - 10/18/06 03:42 PM Re: Using The Radio Shack SPL Meter? [Re: WhatFurrer]
Robot Offline
hobbyist

Registered: 08/24/06
Posts: 24
Thanks, WhatFurrer.

Sory for my ignorance, but it doesn't say "75dB" on the meter (I have the analog version).

It reads from -10 to +6.


Edited by Robot (10/18/06 03:47 PM)
_________________________
VP150 / QS8(3) / M60s

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#149705 - 10/18/06 03:55 PM Re: Using The Radio Shack SPL Meter? [Re: Robot]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17751
Loc: NoVA
Ah. You set the meter to 70 dB (or 80 dB) and read it at +5 (or -5)
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I didn't do it, no one saw me, you can't prove anything.

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#149706 - 10/18/06 04:23 PM Re: Using The Radio Shack SPL Meter? [Re: Ken.C]
Robot Offline
hobbyist

Registered: 08/24/06
Posts: 24
Quote:

Ah. You set the meter to 70 dB (or 80 dB) and read it at +5 (or -5)




Oh, ok. I see.

Thanks!
_________________________
VP150 / QS8(3) / M60s

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#149707 - 10/18/06 05:00 PM Re: Using The Radio Shack SPL Meter? [Re: Robot]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13321
Loc: Iowa
Does your receiver have auto setup with a mic? If so, run that first, that is what I do. Then I go back and check with an SPL meter to make sure that the speakers are the same on the meter. I've heard the starting with the left speaker thing first, but I don't think that matters with the newer receivers.
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M22-OWM22-VP100-Denon2805
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#149708 - 10/18/06 05:45 PM Re: Using The Radio Shack SPL Meter? [Re: SirQuack]
Haoleb Offline
connoisseur

Registered: 09/25/02
Posts: 1488
Loc: Maine
The THX reference level for movies is 85db

I think once you get your meter out and start adjusting the volume to 85db with pink noise you'll find its TOO LOUD!

At least, I did.
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#149709 - 10/18/06 07:23 PM Re: Using The Radio Shack SPL Meter? [Re: SirQuack]
Robot Offline
hobbyist

Registered: 08/24/06
Posts: 24
Quote:

Does your receiver have auto setup with a mic?




It does, but I never agree with it.
_________________________
VP150 / QS8(3) / M60s

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#149710 - 10/18/06 07:25 PM Re: Using The Radio Shack SPL Meter? [Re: Robot]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13321
Loc: Iowa
My Denon setup is very accurate, I don't tweek it much from those settings. I do not use the EQ part of the setup thought, it makes my 60's sound worse. Levels, Delay, etc. it is dead on...
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M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#149711 - 10/18/06 07:35 PM Re: Using The Radio Shack SPL Meter? [Re: Haoleb]
cava Offline
enthusiast

Registered: 08/23/06
Posts: 33
I turn the volume down when its too loud

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#149712 - 10/18/06 11:42 PM Re: Using The Radio Shack SPL Meter? [Re: cava]
BrenR Offline
connoisseur

Registered: 12/10/03
Posts: 3602
Loc: Winnipeg MB Canada
I also suggest pointing the SPL meter toward the screen at ear level (use a tripod). I find it more accurate reflects what you'll hear (unless your audio canals point straight up out of your head) when you're sitting facing the screen.

Bren R.

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#149713 - 10/18/06 11:52 PM Re: Using The Radio Shack SPL Meter? [Re: Robot]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10372
Ro, basically you can rely on MCACC on your Pioneer to accurately set the speaker levels. There's no good reason to expect that a manual setting using the RS meter will be more accurate. That meter isn't a precision instrument(they claim +/-2dB accuracy)and the element of human error can also affect a manual calibration, so if the results differ it shouldn't be assumed that the manual results are more nearly correct.

If you do use the manual setting process, follow the instructions in your receiver's manual. Generally receiver tones are at 75dB and the receiver volume setting is at 0 for the calibration. Then if you desire listening at that "reference level"(usually too loud)you'd have the receiver volume control at 0, where it was for the calibration.
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#149714 - 10/19/06 05:29 PM Re: Using The Radio Shack SPL Meter? [Re: JohnK]
mrnomas Offline
old hand

Registered: 02/16/05
Posts: 86
Loc: Florida
I agree with John. In my experience, the MCACC will accurately set your levels. Just check the speaker size and the sub distance. That will be where it messes up.
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