You need to define "low quality".

I assume you are talking about aliasing.
Initially dynamic text will use the font installed on the
system and display it like a font in the browser.
(unfortunatly it won't render with ClearType, if you use
that TFT Subpixel font-rendering).

Is it this crisp display, tha you call "low quality"?

Or do you wan't your font anti-aliased, like static text?
Then you would need to embed the font, and you have
full control over the anti-aliasing.
Try those Anti-Aliasing settings in the TextFields properties..