Ahh I used to have the old big box 24v Qtron! I loved the sound,but it was too big and bringing an extra plug was a pain (it did seem to suck tone bypassed too) I've since used EBS,Digitech,Boss, EHX Bassballs and Tonefactor filters and never got that sound. I've a 3 leaf Wonderlove coming any day and I'm hoping it'll knock the Qtron+ off my top spot π