"Q" is the property of an equalizer that determines the range of frequencies affected on either side of the center frequency. "Q" is equal to the center frequency divided by the bandwidth. As "Q" goes up, bandwith decreases. A high "Q" indicates a very narrow band of adjustment, meaning very little to the left and right of the center will be affected. A low Q indicates the adjustment will be very broad and affect several frequencies to either side of the center frequency.
And why do you want a "V-shape"? Do you "know" that sounds good or are you just guessing?
And when you say "V-Shape" do you want the visual of the graphic equalizer smiley face, or do you want the frequency response (as viewed on an RTA) to be a "V-Shape", which could have equalizer settings far from a "V-shape" depending on your equipment choices and their installation.
You asked a simple question that really isn't so simple. It is very complex and best handled with tuning over time by either yourself or someone with a good ear for tuning if you are not comfortable doing it yourself.
