The same kbps as a potato
Every single time I have tried DAB it has ended up sounding no better than a potato. Underwater.
The only time I ever listen to radio is TMS on LW, or 5 live MW in the car, which are both equally as capable of sounding like a potato underwater at times. But I accept potato sound quality because it's old tech that's universal, and my portable radio easily fits in a pocket and can do an entire winter test match series on a single pair of AAAs.
I expect much much better from DAB radios that are typically larger, heavier, more expensive and either require mains power or a daily feed of batteries/charging.
Happy to be proven wrong though if anyone can find me a DAB radio that has a mass equal to or less than 150g, dimensions equal to or less than 7cm x 10cm x 3cm, and can run for a week non-stop on a pair of AAAs. Or that works when not driving in perfect concentric circles around the nearest transmitter.
Digital TV works because its consumption happens through a stationary receiver/aerial. Radio on the other hand, less so, alot less.