Among brewers the general consensus is that a double IPA is an IPA with amplified aromas, flavours, and alcohol. The hops are more aggressive both in aroma and flavour, and the alcohol is typically above 7 percent, though this is not a formal rule, since the BA says it can go as low as 6%. So calling an IPA an imperial or a double is really up to the discretion of the brewer.
Malt: American Ale Malt, Munich, Light Crystal, Dextrin Malt
Hops: Centennial, Cascade, Amarillo, Chinook, Eclipse, Kohatu, Simcoe, Citra
Aroma: Citrus and Pine
Flavour: Intense flavours of Grapefruit, tangerine and Pine with hints of tropical Mango all balanced with just enough malt sweetness. A big Hoppy DIPA with a Medium dry finish that is well balanced.
Malt: American Ale Malt, Munich, Light Crystal, Dextrin Malt
Hops: Centennial, Cascade, Amarillo, Chinook, Eclipse, Kohatu, Simcoe, Citra
Aroma: Citrus and Pine
Flavour: Intense flavours of Grapefruit, tangerine and Pine with hints of tropical Mango all balanced with just enough malt sweetness. A big Hoppy DIPA with a Medium dry finish that is well balanced.