This is topic Meyer Sound stuff has issues reaching rated specs/SPL? in forum Film-Yak at Film-Tech Forum ARCHIVE.


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Posted by Haris Ellahi (Member # 9941) on 10-24-2017, 08:36 AM:
 
I saw the following thread on another forum (it's a 2005 thread) about how Meyer Sound stuff has issues or cannot reach their rated specs/SPL. I have also heard this from other respectable sources. Any thoughts?

http://forums.prosoundweb.com/index.php?topic=78746.0
 

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Posted by Marcel Birgelen (Member # 6801) on 10-24-2017, 04:16 PM:
 
You mean, someone inflated the numbers on the specs sheet? No, that never ever happened before.

I'm not really aware of any big number fudging at Meyer Sound though. I mean, they all polish their numbers in such ways to make it look better. In the end, the proof is in eating the pudding.

Even though, a speaker cannot reach the advertised maximum SPL, it doesn't automatically make it a bad speaker. Does your application really need the maximum SPL for example?
 

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Posted by Randy Stankey (Member # 64) on 10-24-2017, 07:04 PM:
 
Sears used to sell Craftsman lawnmowers rated at 5.0 horsepower. It sounded all well and good but, if you read the fine print, you found out that the 5 horsepower rating was measured as BHP (Brake Horsepower) and not Wheel Horsepower or Shaft Horsepower.

So, in other words, that 5.0 horsepower written on the label means the amount of force needed to take the engine from top speed to a gear grinding, smoke belching, dead stop. You will never get that much power from an engine unless you use a break dynamometer. In real life, you'd be lucky to get 3 horsepower out of that engine.

Many products on the market, today, are rated using various laboratory methods that assume conditions that can never be achieved in real life.

You'd be hard pressed to get the same amount of power out of your speakers unless you tested them under the exact, same laboratory conditions that the manufacturer used when they made them.
 

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Posted by Dave Macaulay (Member # 813) on 10-26-2017, 10:58 AM:
 
"5.0 horsepower written on the label means the amount of force needed to take the engine from top speed to a gear grinding, smoke belching, dead stop"
No.
"Brake Horsepower" is equivalent to shaft horsepower, the "brake" is a device that holds the engine at peak HP RPM at full throttle - absorbing the energy. A brake dynamometer basically. It does not stop the engine.
There are lots of ways to measure engine output, and using the most optimistic one is fairly normal. Cars often rate engine horsepower, what you care about is wheel horsepower after the transmission loss and accessory power has been subtracted.
Greaseball car marketers in the 70's would rate the engines at "SAE Net HP", a direct calculation from displacement - not a measure of actual power. The real horsepower of a hot engine could be double SAE and the government was frowning on overpowered sedans.
 

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Posted by Mark Gulbrandsen (Member # 72) on 10-26-2017, 04:03 PM:
 
I;m surprised, because Meyer is one of the best top notch speaker manufacturers around and also very expensive. They also test their stuff outdoors as well as inside a chamber. Most only test in a chamber when designing transducers and cabinets.

Mark
 

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Posted by Scott Norwood (Member # 30) on 10-26-2017, 08:53 PM:
 
Is this really a problem? If a venue is close to the edge of the capabilities of a particular speaker model, wouldn't one normally just go to the next larger model?

In any case the Meyer speakers are excellent. I have heard them in both a screening room and a large theatre and have zero complaints. I have no idea what they cost or if they are a good value, but the sound quality is top notch.
 

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Posted by Randy Stankey (Member # 64) on 10-27-2017, 02:48 PM:
 

quote: Dave Macaulay

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"Brake Horsepower" is equivalent to shaft horsepower, the "brake" is a device that holds the engine at peak HP RPM at full throttle - absorbing the energy. A brake dynamometer basically. It does not stop the engine.

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