First, you must finger the Altissimo E (I'm assuming you know how to play this note, since you are asking for an A) then, you need to do whats called an "overtone," which is when you move the air much quicker, and tighten your embouchure. Also, you should consider stronger reeds. At least for myself, through the use of overtones and stronger reeds (I use size 3 silver box vandorean) I've managed to reach up to a D four octaves higher then middle C.
Basically stated, the normal range is about 3½ octaves. There are many types of Clarinets, the largest 'family' of woodwind instruments. From the Soprano down to the ContraBass there are more than 2 dozen types. Then the difference between them being an E-flat, B-Flat, or A instrument. Total range is hard to pin down as many professional performers can exceed the written range that appears in most textbooks.
I don't understand exactly which F you mean - but from one F to the next it is one octave.
A clarinet made by the Leblanc company. Did you mean something other than that?
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11 octaves on a keyboard
It goes right through the middle of Africa, if that's what you mean.
A stalker.
83651 is the Serial # and 66 means that your clarinet barrel is 66mm long.
Yes, unless it's a student size bassoon compaired with a bass-oboe
It depends which Ab you mean, the Ab note above middle C is approximately 415 Hertz.
You may mean Andy Firth
Somewhat. The Bass Clarinet sounds an octave lower than the Bb Clarinet. It is also much bigger and requires much more air, as well as a looser embrochure. There are also a couple extra keys (depending on your model) that allow you to play even lower than low E.