Why B1 → B2 is uniquely hard
A1 and A2 are about acquisition; B2 is about durability. At B1 you understand the gist of conversation but lose 30-40% of detail; at B2 you catch 80%+ of detail. That last 40-50 percentage points of comprehension takes more input than the first 60 did. Most learners give up here.
Why listening is the bottleneck
Reading is self-paced; listening is real-time. The B1 reader can re-read a sentence; the B1 listener cannot. Native speech runs 200-280 words per minute with elisions, contractions, and dialect. Your brain has to process at native speed without pause. That's the gap that closes the B1 → B2 transition.
What over-investment looks like
Triple your listening hours for a quarter. Podcast on the commute. TV in the target language with target-language subtitles (NOT English subtitles — they kill the listening practice). News in the target language during breakfast. Aim for 45+ minutes of pure listening per day for 12 weeks.
Why reading-heavy approaches stall here
Reading-heavy learners get to B2 in reading and stay at B1 in listening — so their overall CEFR stays B1. The DELE/DELF/Goethe B2 exams test all four pillars; without listening at B2, you fail.
The 90-day audio diet
Pick one podcast (15-min daily), one TV show (45-min, 3×/wk), one news source (5-min daily). Stick to those three for 90 days. The familiarity compounds — by week 6 you'll catch nuance you'd have missed in week 1, even with the same speakers.