Can't increase decibels (working on mute option) in Java

Question

I'm working on a mute button in my GUI and until now have not figured out a way that i can do this so i thought decreasing the decibels and increasing them back with each click. So when i click the mute button i have:

for (int i=1; i<clips.length; i++) {
                FloatControl gainControl =
                        (FloatControl) clips[i].getControl(FloatControl.Type.MASTER_GAIN);
                gainControl.setValue(-60.0f);
            }

and it works great. but when i do the opposite (meaning with +60.0f) i get IllegalArgumentException: Requested value 60.0 exceeds allowable maximum value 6.0206.

I load the clips like this:

AudioInputStream i1 = AudioSystem.getAudioInputStream(Game.class.getResource("clips/1.wav"));
    clips[1] = AudioSystem.getClip();
    clips[1].open(i1);

is there a way to bypass this with my method or does someone know a better way to do what i want? any help is greatly appreciated.