[Harp-L] questions for a replacement of Blue Blaster mic

[christian meuris <blitzcr1s@xxxxxxxx>]

Hi list, 
A friend of mine asked me for a CM or CR I have 'cause is Blue Blaster is dead.
He use it only when he play the blues with a vintage little Fender amp but most of the time  through a P.A.
Question :  it'snt better to replace the element with a crystal or dynamic one ?
Thank, peace
Kris