I bought this amp earlier this year for rehearsals and thought it a nice little amp which had a big sound. However, I was always troubled by the piezo tweeter which sounds 'spitty' and can't be adjusted. Well, yesterday I had enough of it and took off the front grill and removed the 12" speaker - I then plugged the amp speaker lead direct to the 12" speaker and plugged the lead from the crossover to speaker on the spare lugs of the crossover (i.e. where the lead to the amp used to connect) to k