The Albers projection (-JB) is an equal-area conical projection;
its conformal cousin is the Lambert conic projection (-JL).
Their usages are almost identical so we will only use the Albers here.
The general syntax is
-JB
where (
) is the map (projection) center and 
are the two standard parallels where the cone intersects the Earth's surface.
We try the following command:
pscoast -R-130/-70/24/52 -JB-100/35/33/45/6i -B10g5:."Conic Projection": \ -N1/2p -N2/0.25p -A500 -G200 -W0.25p -P >! map.ps