For the most part, Malt Liquor beers are sold in the infamous 40 oz sized bottles. Straw to pale amber in color, most use excessive amounts of adjuncts, such as corn, rice, refined brewers sugar (dextrose) and as a result there are very few "all malt" brewed malt liquors. Hops are barely used, just enough is added to balance off any cloyingness. Higher alcohol versions tend to have a loads of fusel alcohol, which gives off solvent or fuel like aromas and flavors. They are attenuated very well, meaning a higher ratio of fermentable sugars are present over other beers, but without using as many ingredients and still ending up with a high alcohol content. Some breweries enable the use of special enzymes to further breakdown the malt and adjuncts so they will yield a larger percentage of alcohol. This makes for quite a dry beer, with only a small amount of unfermented sugars and a kick that will knock you on your ass.
Average alcohol by volume (abv) range: 6.0-9.0% --BeerAdvocate