Usually 3-5 Days. 45 Day Lowest Price - 100% Satisfaction Guarantee. The Carl Martin DeLayla XL is designed and developed with one goal in mind, To create a superior analog delay pedal, with the same sonic quality as the original DeLayla but with new extended features to get the truest reproduction of vintage tape delay units. To achieve this, it has a second delay head (slapback) (similar to using two heads simultaneously on a tape delay). The SLAPBACK footswitch is used to turn the second delay head on or off. The SLAPBACK knob controls the mix of main delay vs. second delay head.