Qts too high

High Efficiency Speaker Asylum

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It seems pretty common for drivers to have Qts and Fs higher than advertised, or for the units to change up between production runs. I imagine it is from construction shortcuts / using cheaper magnet materials.
So far the drivers that are on spec:
Peerless midwoofers
Some P.Audio (and some not)
Fostex 105WK (kinda)
Not:
Vifa (now made in China)
SB
P.Audio
From this, and what I read, it seems like only the better Euro and US brands actually make stuff that routinely meets spec. Unfortunately, shipping then to Australia + customs blows the already high prices out for me (e.g. I bought a $500 pair of Focal mids years ago which cost $300 more to get to my door).
Are there any exceptions? It seems like for any Asian built woofer, you need to multiply the advertised Qts by about 1.3
On a related note, I just tested a HT sub. The raw driver has a Fs of 48Hz and Qts of 1.1, so in the ported box the response has a "M" shape under 80Hz.

Edits: 03/09/15

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Topic - Qts too high - hollowboy 00:16:52 03/09/15 (5)

RE: Qts too high - deathtube 667 03:21:45 03/10/15 (0)

RE: Qts too high - hahax@verizon.net 20:40:19 03/09/15 (0)

Look at the fs/QT ratio - Paul Joppa 12:18:45 03/09/15 (1)

RE: Look at the fs/QT ratio - hollowboy 15:40:00 03/10/15 (0)

... or, when given lemons, make lemonade - mhardy6647 04:00:41 03/09/15 (0)

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