The consequence of the aluminium material for the body is that less of the soundwave’s energy is absorbed into the whistle body, giving a brighter slightly louder tone.
Tony Dixon Tuneable High D alloy whistle.
Tony Dixon Tuneable Tuneable Soprano D Whistle with Brass Slide DX005D
Tony Dixon Tuneable Polymer Low D Whistle TB012D
Tony Dixon Tuneable Alto Aluminium Bb Whistle DX107Bb
Tony Dixon - TUNEABLE TENOR D FLUTE/WHISTLE DUO ALUMINIUM BODY - DX103D
Tony Dixon DX006C Alloy High C Whistle