hello i have purchased a discountined item from radio shack it is item 21-1834. clip on speaker/microphone. it has 2 jacks, i only need to use the one, i found an old 3.5 plug to extend it out so the plug will fit,however the sound is extremly low barley can hear it. im using this on the gre-500, does anyone know how i can fix this so i can hear from the speaker alot better.i took a chance with this it says its for 2 way radios , but thinking there mite be a way to remedy this, any onw with any help on this is appreciated, thanks