I’m looking for a monospace font which has a lot of the unicode glyphs. In particular I’m interested in the speaker symbols, code points 1F507 to 1F50A.
I’m not sure if the speaker would be included, but have you tried GNU Unifont? It is monospaced, it comes in
TTF and it covers glyphs for every printable code point in the Unicode 6.3 Basic Multilingual Plane (BMP). I do think, however, that it’s a bitmap font.
You can see the insanely huge list of covered glyphs here.
Monospace, on the other hand, is based on Georgia and covers 2,862 glyphs. Apart from the languages, it includes:
General Punctuation, Superscripts and Subscripts, Currency Symbols,
Combining Diacritical Marks for Symbols, Letterlike Symbols, Number
Forms, Arrows, Mathematical Operators, Miscellaneous Technical,
Control Pictures, Enclosed Alphanumerics, Box Drawing, Block Elements,
Geometric Shapes, Miscellaneous Symbols, Alphabetic Presentation
Forms, Halfwidth and Fullwidth Forms.