make a sub
subs don't interfere with the volume outputs and they're as simple to make as a bread sandwich.
just take a good shape (i recommend saw&sine or detuned saw) and EQ it to only fit in the incredibly low freq. range.
it really fills up the song's range and just makes it sound better.
not that it's not good already, which it is,
i liked the airiness of it.
Please contact me if you would like to use this in a project. We can discuss the details.