Which instrument has a range from Bb1 to Bb4?

The bass trombone is known for its wide range, particularly from Bb1 to Bb4. This instrument is characterized by its rich, low tones and the ability to play in various octaves, which makes it a versatile part of the brass section. Its construction allows it to access both low pedals and higher notes, bridging the gap between bass and tenor ranges effectively.

The other instruments listed have different ranges and characteristics. For instance, the tuba typically has a lower range but does not extend into the upper register as drastically as the bass trombone. The trumpet, while capable of reaching higher pitches, does not cover the lower range effectively. The French horn also has a range that includes higher notes but does not typically reach as low as the bass trombone. Understanding the specific range and capabilities of each instrument helps clarify why the bass trombone is the correct choice for this particular question.