The Boss GE-7 Graphic Equalizer effects pedal is essential when you want full control of your sound. For sale online at Guitar.co.uk and in our Glasgow shop. Fast UK delivery service. The Boss Pedals GE7 Graphic Equalizer can be used in many different ways. You can use the EQ pedal as a boost for solos or for eliminating unwanted feedback. The GE-7 EQ pedal is a great way to sculpt your guitar sound. It is not just for guitar though. It will work well with many other instruments too.