The DaPonte String Quartet will launch its 25th summer season with Series I: Clarinet Envy, a pair of classic clarinet quintets featuring guest artist Mark Dover, Wednesday, July 6, at 7:30 p.m. at the Ocean View Grange, 435 Port Clyde Road/Route 131.

The Series I program offers Mozart’s Quintet in A Major and Brahms’s Quintet in B Minor Op. 115. Dover, a member of Grammy-nominated Imani Winds, calls these quintets “two of the greatest chamber works ever composed." Both pieces were written at the peak of the composer’s power, and Dover says clarinetists are “deeply thankful to have these two masterpieces in our repertoire.”

The DaPonte String Quartet is entering its 25th year. Founded in 1991 in Philadelphia, it moved to Maine more than 20 years ago and now performs more than 60 concerts a year, year round, from Presque Isle to Ogunquit.

After the opening concert, the series will continue Thursday, July 7, at 7:30 p.m. at the Union Church, Middle Road in South Bristol; Tuesday, July 12, at Centennial Hall, 936 Harpswell Neck Road, Harpswell; and Wednesday, July 13, at the Visitor Center of Coastal Maine Botanical Gardens in Boothbay.

Tickets are $25, free for those younger than 21. For tickets and more information, call 529-4555 or visit daponte.org.

This summer’s Series II: Then and Now features the world premiere of Dutch-born composer Rocco Havelaar’s Quartet No. 3, as well as J.S. Bach’s Three Contrapuncti from “The Art of Fugue” and Mendelssohn’s Quartet in F Minor Op. 80. Written toward the end of his life, “The Art of Fugue” is the culmination of Bach's experimentation with monothematic instrumental works. Mendelssohn’s quartet was an homage to his sister Fanny, a gifted composer in her own right. Havelaar said his work is inspired by Brahms and late Beethoven.

The Then and Now concerts are as follows: July 23 (minus the Havelaar), 2 p.m. at the Dresden-Richmond United Methodist Church; July 26, 7 p.m. at the Burnt Cove Church Community Center in Stonington; Aug. 2, 7:30 p.m. at Ocean View Grange in Martinsville; Aug. 4, 7:30 p.m. at the Union Church, South Bristol; Aug. 9, 7:30 at Centennial Hall, Harpswell; Aug. 10, 7:30 p.m. at Coastal Maine Botanical Gardens, Boothbay; and Aug. 13, 7 p.m. at the Chebeague Island Methodist Church.

Courier Publications’ A&E Editor Dagney C. Ernest can be reached at (207) 594-4401, ext. 115; or dernest@courierpublicationsllc.com.