trust me I've been doing some reading of old threads and such but I haven't found an answer to this particular question: I have a Hartke LH series amp...and I love it. Any complaints I have are minimal considering the $408 out the door for 1000 watts of good amp. Complaints: Little bit of noise (could be my house wiring) Could use a more drammatic EQ, its a stackable EQ apparently, and its a learning experience that I may cheat on and just get a graphic eq from source audio, ashdown, boss etc... (my actual question here) Preamp has a "sound" built in to it which is very pleasurable, kinda swr like, a scoop to it. Very warm, crisp highs, smooth low, punchy etc. HOWEVER the mid is really really tame. The "Mids" knob is not broken, but there just isn't that availability of mids that I', used to. Don't get me wrong, I love the sound. All my basses sound great through it, the preamp and power stage has an excellent vintage vibe mixed with hartke punch. What I'm wondering is if I replace the stock tube with something else, will a different tube possibly have a more dramatic mid response. The other amp i have is a Warwick quadVI. Its got more knobs, more buttons, more tubes, and probably dif. tubes and well, its a warwick product so its got mids and more built in control to achieve them.. The mids on that thing will punch you in the stomach from the next room. I'm not looking to recreate that, I like the difference between the two amps, its just that I want a little more of an option for the mids. To anyone who happened upon this thread looking for Hartke LH info, I feel the need to reiterate that this problem is barely a problem for me. these amps don't pretend to have a million knobs. They do great vintage tone with the capability to be more aggressive and just sound awesome. and when you add in that they are cheap...well I bought this because it was cheap and I wanted something simple and that I didn't care so much about if it got spilled on or dropped. I now care about it as much as I do my wick amp. To clarify what I'm hoping for in responses is recommendations on tubes and or equalizer pedals (maybe racks) that are some of your favorites and if you are feeling nice, say why.