I bought the DI version recently and really enjoy it for playing through cans. I generally use my LA-1A for a clean, tube sounding DI but I feel like the DI attenuates the highs a bit, and there's always compression. The Small Trees DI is smaller and maintains all the highs as well as warming up the sound to "fill the gaps" that solid state just doesn't do typically. It's not an absolute tradeoff for the LA-1A since both have their advantages. But in a nutshell, TST warms things up nicely. I had previously contacted Steve at AK and believe the version for sale here should be upgradeable to the DI version (same enclosure) and you may even be able to do it yourself with the parts sent to you.