Solid Silver Headjoint

Many intermediate and professional line flutes often have a solid silver headjoint rather than a silver-plated nickel headjoint. The solid silver headjoint provides more clarity in the overall tone of the flute and often has better response throughout each register. 

In-line vs. Off-set G

Most student model flutes will have an Off-set G key for ease of play as a beginner. An Off-set G where the G key is out of alignment with the rest of the keys while an In-line G key refers to all keys being in alignment. Intermediate and professional line flutes are available with either an Off-set G or In-line G. There is not a significant difference in the tonality of the instrument and choosing between the two types is entirely based on the preferences of the individual and what is most comfortable. 

French-Model (Open-Hole)

This refers to the open tone holes on the flute keys. Having open-hole keys allow for a greater range of fingerings and playing techniques, as well as improved tone. However, they are slightly more challenging to play and require precise finger placement in order to completely cover the tone hole.  Most student model flutes are made with closed-hole keys (plateau) that are easier to start on for beginning players. 

B-Foot Joint

The B-Foot Joint refers to the extended foot-joint of the flute. Where most student model flutes cannot play lower than a C, the B-Foot extends the range of the flute by an extra note.

Gizmo Key

The Gizmo key is a small key found on most flute models with a B-foot joint that allows the player to close the low B key without closing the low C or C# key. The Gizmo key acts as a way to vent airflow to allow better tone production in the higher register on the flute. 

Split E Mechanism

Some intermediate and professional line flutes offer a Split E Mechanism that improves the response and tone production of the third register E, a note that is notoriously challenging to play with consistency. 

Gold Lip Plate

Having a Gold Lip Plate on a flute does not change the sound of the instrument and is typically meant for individuals with a sensitivity to silver or those who prefer it for cosmetic reasons.