The S series (S stands for for "small bore") is louder and fuller than the V series ("very small bore"). Available in high E-flat down to B. (The B-flat is no longer available in the S-series, only in the M-series.)
Here you may listen to Grey Larsen play a tune on a D whistles of the S-series and the V-series, in order to compare their sounds. Just click on the "Listen" buttons on the lower part of the page.
When ordering a set of one headjoint with multiple whistle bodies, or an extra whistle body, please specify the pitch(es) desired when you are asked to "Add Comments About Your Order".