Scored without violins, this concerto uses violas and cellos to achieve a rich, warm, and dark sonority. Its contrapuntal beauty and textural intimacy make it a singular achievement in the set.
Focus on maintaining a rich, singing tone throughout the lower register lines.
Brandenburg Concerto No.6 (BWV 1051) is rated Henle level 6 of 9 — advanced repertoire, roughly ABRSM grades 7–8. In the RCM system it corresponds to about level 9.
You should be comfortable at Henle level 6 — meaning you can already play level 5–6 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Brandenburg Concerto No.6 (BWV 1051) lasts about 18 minutes.
Brandenburg Concerto No.6 (BWV 1051) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.