Really? About Tubescreamer I've heard great things but I'm not sure it is what I want, but about SD-1 I haven't heard that great things.
I'll try and explain what I want as accurate as possible: I want something that increases the volume of the signal X dB but modifying it (gain/mids/etc) the minimum possible). Just something that works as similar to turning the volume knob on the amp up as possible, because at live gigs you can't go running at the amp and increase the volume randomly for the solos and then get it back to normal while playing,
Well from what your saying, Im getting that you want a pedal that will boost the volume of your amp for solos, but you don't want it to affect the tone of your amp, just the volume level.
O/D pedals will definitely color or change your tone, making it more grainy or with a spiked EQ, So you probably don't want that.
I would reccomend an EQ pedal, it can have two functions, it can just plain Clean boost your overall tone, but say you wanted to change your lead tone a bit you can shape your lead tone without adding distortion or radically changing the timbre of your amp.
A plain old Clean Boost pedal would work two, but without the tone shaping capibilities.
Also! This type of boosting would be most effective in the FX-loop of your amp (if it has one). The FX-Loop is after the Pre-amp of the amp (gain/EQ knobs/ect) so you would be just boosting the input of the poweramp section of the amp, giving you a pure volume boost.
If you put a clean boost in front of the amp instead, It wont really change the volume of your amp radically, just distort the pre-amp and Might not sound as natural.
O/D pedals are put in front of the amp to change the tone of the amp, not the volume
I'm definitely getting a Rocktron HUSH next. When I played with my friends band the other week, it was my Jackson RR into the ADA MP-1 and the soundguys were like "hmm okay, who's the guitarist with the hissing sound???!!"
WHOOPS!
That was with the gainboost OFF, gain low, presence low etc. If I'm going to be using a boost with the GP-1000, then a noise gate is EXTREMELY important because it will actually sound TERRIBLE without it.
I don't even know how to use the buggers.
Noisegates are pretty easy, a threshold knob that controlls the sensitivity of the gate (it cuts off the signal after it senses the signal noise is X amount quiet), and another knob thats a decay knob that determines how long it takes to gate on and off