nope.
Is this the Bose system?
If so, there is little or nothing you can do, short of replacing it.
The Bose systems (we call them Blose over at
www.corvetteforum.com), are a real pain.
Internally, they use a wack 1 ohm stable amp, as such, you can't even upgrade the crappy drivers Bose uses... ick.
And the Honda factory drivers are junk, too.
Don't use adaptors, the line level converters are pigs. They do nothing but create noise.
Take care.