Can we trust manufactory specs ?

[DanielT]

You did (and me too):

View attachment 516720

They mixed definitely something up.

He he, I wonder what kind of powder the person who wrote that text was sniffing?
That person also didn't report how many lines were the peak.

Maybe they got some virus in their IT system that messed up their website? Please note that this is just speculation on my part, I am not knowledgeable in such matters.
(by the way, my knowledge in Peak Powder Handling is non-existent)

 

[Mnyb]

He he, I wonder what kind of powder the person who wrote that text was sniffing?

Maybe they got some virus in their IT system that messed up their website? Please note that this is just speculation on my part, I am not knowledgeable in such matters.

If one assumes that’s the marketing department that does the official spec sheet , it all falls into place it’s all technobabble to them and finesse some numbers to be bigger ? More is more to quote Yngwie Malmsteen .

The most useless spec’s must be power handling and max spl ? It’s never defined how exactly they come up with those numbers.

I’ll send 200w 20hz to the nearest 6,5” bookshelf two way ….

Here a set of measurements tells more , again.

 

[gasolin75]

 

[gasolin75]

If one assumes that’s the marketing department that does the official spec sheet , it all falls into place it’s all technobabble to them and finesse some numbers to be bigger ? More is more to quote Yngwie Malmsteen .

The most useless spec’s must be power handling and max spl ? It’s never defined how exactly they come up with those numbers.

I’ll send 200w 20hz to the nearest 6,5” bookshelf two way ….

Here a set of measurements tells more , again.

Mine, 96 db but even at, lets say 85 db where im sitting, it's 100 db a few inches from my speaker and it's only one speaker

1 watt = 85 db (or more) 10 watt = 95 db and it can handle 100-120 watt depending on the amount of bass

Like if top speed on a car matters on a avarage long race track or monaco, often handling,sound quality matters more

 

[EJ3]

In audio, manufacturer specs are usually fudged as much as they think they can get away with. Naturally this correlates strongly with the sophistication of the target customer.

When you go shopping for a portable "party speaker" from a brand that doesn't expect reviews that corroborate their claims ever, you'll see silly, physically impossible claims like 5000w output from a 12V 3A battery.

When you go shopping for studio monitors from a brand that outfits world class studios the specs probably line up with reality within a few percent.

In between you'll find uncontextualized claims that are kinda true under certain conditions, like portable speakers that do "120dB". It may be possible to get that SPL if you put it in a small reflective room and play a certain tone or band limited noise, etc.

Manufacturer specs should be considered fiction based on fact (loosely or closely) until 3rd parties have verified their claims at least once or twice.

And sometimes the manufacturer MAY be correct because they used a test with different parameters:

We measured the sensitivity of the M-905 as 87 dB SPL, which was lower than the rated 91 dB but still about average for speakers of its size.
The difference may have been a result of different test conditions since we used a full-range pink-noise signal while Dahlquist’s rating was made at 1,000 Hz.

 

[gasolin75]

Fosi Audio TB10D rated at 2x230W 4 Ohm. guess what, it doesn't come close

Fosi Audio TB10D Amplifier Review

This is a review and detailed measurements of the Fosi Audio TB10D stereo amplifier. It was sent to me by the company and is only sale for US $70 on Amazon including shipping. We have the typical compact desktop aluminum case. Controls feel nice for the class. Tone controls are not centered...

www.audiosciencereview.com

 

[Chr1]

Aye.

The list of amplifiers with daft power claims is definitely a rather long one methinks.

 

[gasolin75]

At least wiim amps has about the power they are rated for, the wiim amp ultra does have 2x100 watt in 8 ohm and close to 2x200 watt in 4 ohm , 185 watt in 4 ohm is close enough for me that it won't make a difference if it had 200 watt within a few watt difference (wiim amp pro has more than 2x60 watt and 2x120 watt)

 

[gasolin75]

Forgot i had picture of the size of the 12.1i's

 

[mhardy6647]

Forgot i had picture of the size of the 12.1i's


View attachment 516896View attachment 516897

I believe you posted this earlier (or maybe it was a different loudspeaker). The nominal diameter of the drivers would be across the frame, not the cone (nor the surround). That hasn't changed for decades.

The cone diameter does figure into certain Thiel-Small parameters - but the driver sizes are based on the frame (basket).

 

[gasolin75]

It was first the 12.2i and now the 12.1i's