It was authorized into the orchestra during the 18th cent. , and Mozart used it substantially. Major improvements of the key system during the 19th cent. employed the principles of Theobald Boehm. The clarinets in B flat and A are the typical orchestral gadgets. The higher, shriller E flat clarinet is also a band device and is used every so often in the orchestra. Of the bigger clarinets, the B flat bass clarinet is probably the most important. The E flat alto and the E flat contrabass clarinets are mainly band instruments. Clarinets were once made in other keys, but all of those gadgets are now out of date. The basset horn, a form of alto clarinet, was much used by Mozart and was revived by Richard Strauss. The clarinet is a transposing instrument.

C.G.Conn 16B 1950 Manufacturing Used Goods Wind Machida CLARINET CONN 16 w/Mouthpiece and Original Case Vintage Conn Model 16 Clarinet W/ MCM Carrying Case Luggage, Mouthpiece + EUC Conn 16 Bb Clarinet 1966 Conn Bb Clarinet Model 16 Complete with Case & Precision Mouthpiece Vintage Conn Model 16 Clarinet With Case CLARINET STUDENT INSTRUMENT CONN Precision # 16 Conn Model 16 Bb Clarinet Instrument Parts, Mouthpiece, Cap, and Ligature Conn 16 Clarinet CONN 16 " VINTAGE CLARINET Untested Condition Clarinet with Hard Case Conn 16 Vintage CONN16 Clarinet w/Precision Mouthpiece (MUS014) Conn 16 Clarinet Clarinet24 Vintage Conn Model 16 Clarinet W/ Case, 2 Mouthpieces, Music Books, More - EUC Conn Model 16 Student Bb Clarinet with case sn #c98801mouth piece x3 Conn 16 Clarinet w/ Case, good condition Conn 16 Clarinet w/Hard Case and King B Mouthpiece Clarinet VINTAGE CONN 16 in original case - rare find - used CONN 16BP CLARINET Vintage Conn 16 Clarinet with Hard Case & EZ Tone Mouthpiece CLARINET---CONN 16 B-FLAT---WITH CASE-----USED---[40-50 YEARS OLD!] CONN 16 CLARINET WITH HARDSHELL CASE CONN 16 clarinet Bell - plastic (stock#81021) VINTAGE CONN 16 BLACK CLARINET bell only Vintage Conn 16 Reso open hole clarinet w/ case Conn Clarinet 16 Bell (stock#81025) Conn 16 Clarinet Upper Joint (stock#811057) Refurbished Conn Model 16 Student Bb Clarinet CONN 16 Clarinet Upper section (stock#811056) VINTAGE CONN CLARINET #16 AND CONN EZ TONE MOUTHPIECE c 1965