Re: ɒ, the counterpart to ɔ in AmE?
No. The problem is that your first sentence, "I think /ɒ/ as in not, hot, cot in BrE is the counterpart to /ɔ/ as in call, ball, hall in AmE." is not clear. For nearly all speakers of BrE and some speakers of AmE , the vowels in 'cot' and 'caught' are different phonemes. For other speakers of AmE, these two words are pronounced identically; there is only one vowel phoneme. There is also the problem that American and British writers sometimes use different symbols when they transcribe phonologically. .
Originally Posted by keannu
So, if you are asking a question about this vowel/these vowels, you will either have to use IPA phonetic (not phonemic) symbols, or provide links to sites where we can hear the sound(s) you are talking about.
Please do not edit your question after it has received a response. Such editing can make the response hard for others to understand.