The Original Loud F1 (AJs Sour Diesel crossed with Spicy Jack was the happy accident that started Loud Seeds).
Loud is an interesting genetic cross in the sense that they isolated a phenotype that captures the best qualities of both strains. You get petrol, lemon, and Pez candy on the nose.
The plant doubles in size from the time it starts flowering and when grown outdoors from seed it is not uncommon to see 12 foot tall plants.
The Loud grows much denser than Sour Diesel from the Jack influence yet has the same initial characteristics and the same nutrient requirements as the Sour when grown properly. The crystal content is mind blowing even when using organics.
Ed Rosenthal himself smiled and said this herb is quite amazing after chewing on a node for a minute or two.