|Horn courtesy Howard Wise.|
The B-6 was larger than the similar-looking A-6 and had a somewhat more refined appearance, with recessed nuts on the front of the power chamber and a slightly different arrangement of the reinforcing ribs on the bell.
The B-6 was replaced in the catalog by the much different-looking B-7. The photo at left shows a B-6 on the left back-to-back with a B-7 on the right, illustrating some of the differences.
B-6 sound samples:Horn courtesy Howard Wise: