Standard SPL Meter for Subwoofer Placement - AVS Forum
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post #1 of 14 Old 04-03-2013, 06:34 AM - Thread Starter
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I want to analyze where I've placed my subwoofer. What is a good, known, inexpensive SPL meter. I've read some posts where people recommend Radio Shack meters. Which one is considered the standard? Is it the 33-2055?
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post #2 of 14 Old 04-03-2013, 07:01 AM
 
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Quote:
Originally Posted by ed3120 View Post

I want to analyze where I've placed my subwoofer. What is a good, known, inexpensive SPL meter. I've read some posts where people recommend Radio Shack meters. Which one is considered the standard? Is it the 33-2055?

I have and have used the Radio Shack sound level meter for many years. The Radio Shack meter I have sitting next to me is the model you suggest; Cat. No. 33-2055. The Radio Shack sound level meter is the forum standard.

Recently, I decided I wanted better and purchased several different sound meters to try out and acquired a sound level meter calibration device so as to verify the accuracy of each of the sound meters being auditioned.

This is the current sound level meter being used.

The difference, the one I suggest meets Type 2 standards and can be used for legal purposes (the Radio Shack model is unrated, type 3), reads <60dB (30dB), has a back lit panel and who's measuring microphone column fits standardized calibration devices. So, should one buy a calibration device, they can at home, easily, accurately and regularly, verify the calibration of their sound level meter. This as opposed to wondering or finding need to send the sound meter in for an expensive calibration check.

The device is spec'd to +/-2dB but calibrates out to -0.1dB.

(My only complaint with this unit, the panel back light turns off after five seconds and this timing can't be altered.)

Calibration device used.

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post #3 of 14 Old 04-03-2013, 08:55 AM
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Quote:
Originally Posted by ed3120 View Post

I want to analyze where I've placed my subwoofer. What is a good, known, inexpensive SPL meter. I've read some posts where people recommend Radio Shack meters. Which one is considered the standard? Is it the 33-2055?
Yes, but a meter by itself doesn't do what you want to. You need software like REW or HolmImpulse to chart in room response. For that purpose this works better:
http://www.parts-express.com/pe/showdetl.cfm?partnumber=390-808

It doesn't measure SPL, but where charting room response is concerned that doesn't matter.

Bill Fitzmaurice Loudspeaker Design

The Laws of Physics aren't swayed by opinion.
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post #4 of 14 Old 04-03-2013, 09:06 AM
 
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Agreeing with the above, to complete the idea, one needs both, a sound level meter to set the initial volume of their subwoofers and a room analyzing program so the user can physically see the acoustics of their room and how their subwoofers are integrating into the room's acoustics.

If you will, it's all part of a "proper" EQ kit; sound level meter, room analyzing program, measuring microphone and a method to EQ the sound system's output.

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post #5 of 14 Old 04-03-2013, 09:36 AM
 
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HolmImpulse.....confused.gif

Vs REW?

And the benefit of HolmImpulse vs REW is? confused.gif

Measuring gear, programs, three subs. EQ systems.......

(I already have everything else, oh heck, let's throw HolmImpulse into the pot)

.....tongue.gif
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post #6 of 14 Old 04-03-2013, 06:46 PM
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I can't find this meter on their site
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post #7 of 14 Old 04-03-2013, 07:18 PM
 
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Originally Posted by 04rex View Post

I can't find this meter on their site

Which meter, the Radio Shack meter or another mentioned meter? I'm guessing here, at this point, it may be discontinued.

When I go to Radio Shack's website and put "Digital Sound Meter" into their search engine, this is the sound level meter link that comes up.



Radio Shack doesn't publish the spec's on this unit and the review, in my opinion, wasn't encouraging.
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post #8 of 14 Old 04-04-2013, 08:20 AM
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I was referring to the 33-2055 that was first mentioned from Radio Shack
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post #9 of 14 Old 04-04-2013, 08:42 AM
 
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Quote:
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I was referring to the 33-2055 that was first mentioned from Radio Shack

Give Radio Shack a call and ask them; what's up with that.
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post #10 of 14 Old 04-04-2013, 09:04 AM
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Quote:
Originally Posted by BeeMan458 View Post

HolmImpulse.....confused.gif

Vs REW?

And the benefit of HolmImpulse vs REW is? confused.gif

Measuring gear, programs, three subs. EQ systems.......

(I already have everything else, oh heck, let's throw HolmImpulse into the pot)

.....tongue.gif

I would suggest actually learning to use what you have before adding another product.
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post #11 of 14 Old 04-04-2013, 09:13 AM
 
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"Troll"

"...the primary intent of provoking readers into an emotional response[2]..."
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post #12 of 14 Old 04-04-2013, 12:16 PM
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Originally Posted by BeeMan458 View Post

"Troll"

"...the primary intent of provoking readers into an emotional response[2]..."

You calling anyone else a troll - how ironic

My suggestion was serious.
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post #13 of 14 Old 08-13-2013, 10:05 AM
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For somebody completely new to this topic: what is the benefit of doing this manually vs. using Audyssey from an AVR?
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post #14 of 14 Old 08-13-2013, 10:40 AM
 
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Quote:
Originally Posted by iron-marshal View Post

For somebody completely new to this topic: what is the benefit of doing this manually vs. using Audyssey from an AVR?

If using Audyssey, saving your sanity.

Audyssey has a boatload of incremental sonic filters in which to custom set playback information and does so in a cost efficient fashion. It's not possible to manually equal what Audyssey has to offer with just a sound meter. One would need a sound board (EQ) with enough slides to equal what Audyssey is capable of and then it would frustratingly take hours vs the minutes it takes using the automatic EQ feature Audyssey provides.

The above is not to say Audyssey is a final solution as there does need to be user interaction and there are different levels of Audyssey; XT32 being the most desirable of the three possible choices.

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