Detail 01
Strength 4
Hard. Takes real air and embouchure control, and returns a focused, resistant response with a stable high register.

Independent shopping perspective
A box of five bass clarinet reeds in strength 4, cut on Vandoren's thicker V12 profile. For established players who want high resistance.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
Hard. Takes real air and embouchure control, and returns a focused, resistant response with a stable high register.
Detail 02
Thicker blank and longer vamp than the traditional cut. More cane vibrating gives a rounder, denser tone.
Detail 03
V12 reeds tend to feel stiffer than the same number in the traditional cut. A 4 here is genuinely hard.
Detail 04
Rotating between all five rather than playing one to death extends the useful life of each reed.
Detail 05
Cut and sized for bass clarinet mouthpieces. Will not fit a soprano Bb clarinet.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
If you are not already comfortable on a 3.5, likely yes. A 4 demands sustained air support and a developed embouchure to speak cleanly.
No. The V12 blank is thicker, so the same number feels stiffer. Many players drop half a strength when switching to V12.
No. Bass clarinet reeds are larger and cut for bass clarinet mouthpieces. A standard Bb clarinet needs soprano reeds.
Cane varies. Five gives you a rotation, and rotating reeds between sessions lets each dry fully and last longer.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.