The electromechanical properties of [110]-oriented 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) crystals have been investigated under uniaxial stress (sigma). [110]-oriented crystals have a longitudinal electromechanical coupling coefficient (k(33)) of similar to0.9 and an acoustic power density of 12 dB which decreases to 8 dB with increasing sigma between 0 and 4x10(7) N/m(2). The results demonstrate that the advantages in terms of power density and coupling coefficient of oriented piezocrystals are not constrained to the [001]-orientation, but rather can also be obtained along the [110]. (C) 2003 American Institute of Physics.