I am planing on purchasing a set (4) of Usher drivers 8948A from PE and am wondering about the importance of driver matching. every driver has a sticker on the magnet showing a scale of numbers between 0.6 to -0.6. One of the numbers is checked on the scale of each driver. I am wondering what it signifies and if each driver should have an exact or similar match. See photo.
Thanks and happy holidays.
Thanks and happy holidays.
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Putting my Sherlock hat on I am going to guess the 88 is the nominal sensitivity rating of 88dB and the -0.2 that is marked there is the measured. So that driver is 87.8. If so I don't think you will notice that small of a difference. I would guess that if the driver falls outside of that scale, it is not sold to the public. All assumptions of course.
That would be my guess also. It could also be a delta from some standard freq. response they may do at the factory at the end of the manufacturing line.
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