I'm going to be getting a Tubescreamer soon to boost my 6505+ combo. I tried a regular TS-9 and was very impressed, but I'm wondering if the extra adjustment of the DX will be useful or a waste. I will only be using this as a boost to tighten up the sound, with the gain at zero and the level all the way up.
If you just want to tighten it up the TS-9 will do just fine imo. You wouldn't be using, or needing the extras
I have a DX, and if you're only using it as a boost, the extra mode would be a waste.
The only extra mode on the DX that really sounds different (to my ears at least) is the Turbo mode and it makes your amp loud as f**k and adds a ton of gain. If you're just using it to boost and tighten your amp's dirt channel, the TS9 (or even a TS7 if you can find one) would work perfectly.