Proto-Dahu-Kemba is reconstructed as having 21 phonemes. It was characterised by its few points of vowel articulation, a lack of voicing contrast amongst consonants and the prominence of velar, uvular and pharyngeal sounds. Syllables were simple or moderately complex.
The standard model of PDK has stood the test of time, but some uncertainties remain. These are indicated below. The language was unwritten. We must assume that it had dialects, but nothing is known about them.