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"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
BTW im talking about loud live band playing ....
With an MV amp, the MV determines the MAXIMUM output level (again assuming the amp is operating within its clean headroom). The volume will however be dependent on the gain/drive control's setting. Set low, the amp will become quieter, set high, it will be louder....
The aim is to balance the two controls in such a way that they give you the gain characteristics that work best with your playing dynamics, at the right level to fit in with a band's mix.
Many players perceive very high levels of gain fail to 'cut through' at higher stage levels - presumably because the dynamics of their playing are heavily compressed under hi gain - therefore 'digging' doesn't get you 'heard' more.
As I said, the trick is balance. You might find less gain and more MV works best for you in a live situation.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
The only "fair" and consistent test of a guitar amplifier IMO is with all controls at max and injecting a specified input voltage (which will be VERY wee in many cases and getting clean, i.e. noise free results needs care.
Of course, slamming everything to max will probably cause some amps to go instable, but I only dealt with them as didn't!
I shall not go any deeper into the test procedures I used, not mine to tell but if other amp makers would like to weigh in?
On the subject of pre versus power amp gain. Remember, not all OP valves have the same sensitivity, by a long way! A pair of 6V6s will demand a much greater drive from the PI than EL84s for instance. Then, the application (or not) of negative feedback will muddy the waters!
Dave.
This: http://www.google.co.uk/imgres?imgurl=http://www.audioholics.com/audio-amplifier/product-managing-receiver-platforms-power-ratings/distortion.jpg/image_preview&imgrefurl=http://www.audioholics.com/audio-amplifier/product-managing-receiver-platforms-power-ratings/product-managing-receiver-platforms-power-ratings-page-2&h=245&w=400&sz=16&tbnid=jxN7nbno4RWtcM:&tbnh=90&tbnw=147&zoom=1&usg=__2Ospe6bOmEPsBuRHzbrVXXqcykI%3D&docid=zyGm_FcRwrf9eM&sa=X&ei=im_8UvaYEY6QhQfimYG4Dw&ved=0CDEQ9QEwAg
is hopelessly out of scale (HTF do we post attachments?!!) but it shows the principle.
Once you reach the power amp's limit you do not increase output, merely produce more distortions. Then, "gain" controls on guitar amps almost never are, they are simply interstage volume controls.
The above curve also shows why simple "solo boosts" hardly ever work, once you have got close to the power limit you have had it all!
Dave.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein