full blast

(at) full blast (using full power; as loudly as possible) — на полную громкость, на полную мощь, в полную силу

Example 1: The neighbors had their televisions on (at) full blast. — У соседей телевизор был включен на полную мощь.(NTC's)

Example 2: The car radio was on (at) full blast. We couldn’t hear what the driver was saying. (NTC's)

Example 3: It was a scorching day outside, but the driver had the air conditioner going full blast.