We have removed some sets from the Altiverb IR library (mainly user submitted IR sets) that do not meet up to our current standards. The Speakers and Phones set is one of these. You can copy the original set from your Altiverb 6 Impulse Responses folder (if you still have this) to the Third Party IRs folder in the Altiverb 7 Impulse Responses folder.
Then you can then load these IRs again in Altiverb 7.
You can also download the original set from: