Love this amp. I played it with the EQ flat and flat with just the deep switch engaged. I used a Lakland Skyline Jazz (good but my Sad's should be a ton better) through the Aggie 4-12 cab. Sounded great. Then tried it through an Epi 2-12. Not great until I boosted the mids on the DB750. I thought the Aggie 4-12 cab sounded really nice. But, I am going to be trying an El Whappo early next month. As much as I like the DB750 I may just go with the DB659 or DB680 pre. I need to be able to run direct out of the unit while NOT having a cabinet connected about half the time (direct/in-ears). From my understanding you HAVE TO have a load on the DB750. Is this incorrect and can I get some more feedbacl on the DB659 vs. the DB680? I loved how tubey yet tight the DB750 was. Yikes I love this sound!