I have a Beocom 6000 with Earset 1 as well. Very much satisfied. No issues with low voice volume at all.
However, it is a pity that the telephone does not have a speakerphone.
BV7-40, BC6-26, DVD2, BCordV8000, BS4, BS2, BS Ouverture, BC9500, BM8000, BCord9000, BL8000, BL6000, BL2, BL3, BVox4500, BCom6000, Beomedia1, BCom5, Serenata