I bought a used Landmark 600. I can't say enough about it. It is completely incredible. I was a die hard B-15/SVT guy. I broke my back and got real tied of the repair costs. While the 600 is roughly 40lbs. , it still is a lot lighter then a the classic, all tube SVT. Thing is, the 600 is totally quiet and is built like a tank. I opened it up with a tech and we were floored with the impeccable construction. I don't feel compromised. I feel someone built what is needed... a reliable, bone crushing amp that you can count on to deliver some vintage hump. Oh... it has channel switching too. The input is also 1 Meg ohm. This is a big part of tube amps that is over looked.
My BDDI is ten years old, is chipped up, and has been around the world. Never hums, the pots are still clean, and it runs on phantom power. Not to mention, it's a great sounding passive D.I. with out turning the effect on. I've got the new two channel on order so my Radial Tonebone is history!
I feel I could throw my BDDI as hard against the wall as possible and it would keep on ticking!!
If I had one complaint it would be that Tech 21 tries to market to metal players. Metal is great, but this gear is fabulous for all styles clean or dirty. Heck, Les Paul has been using one for years and that says a lot.
Sound men really dig this stuff. It's always positive. I even had a few confused as to why more players don't go that way.
Thank you Tech 21!!