Examples from the Web for euphonium
Perhaps the most remarkable place in which a burglar carried his tools was a euphonium!
The bombardon in B flat or C, an octave lower than the euphonium, corresponds to the contrabass tuba in the orchestra.
The euphonium speaks readily in the lower register, but slowly, of course, owing to the long dip of the pistons.
The euphonium gives out the fundamental, or first note of the harmonic series, readily, but no harmonic above the eighth.
The pitch of the helicon is an octave below that of the euphonium.