Tortuga Effects Single Malt Delay and Echo The Single Malt™ provides both quality and quantity in one beautiful package. With Dual, foot-switchable rate controls, the Single Malt™ can act like both a small room echo and a long solo delay at the push of a foot switch. It can also be run at 9v with the internal battery or external power supply for more of an analog warmth or up to 18v with external power for more headroom and clarity. Sometimes all you need is a great Single Malt™ to make you feel like a million bucks.