Exotic quantum-spin states and quantum phase transitions can be induced by applying magnetic fields. Sr3Cr2O8 has strong antiferromagnetic interactions which couple the spins into dimers. The magnetic interdimer interaction can form magnetic quasiparticles (triplons) in the network of dimers. An external field can condensate this magnons in the ground state. Our temperature-dependent measurements of magnetisation and ultrasound velocity in high magnetic fields revealed not only a Bose-Einstein condensation at 32T, but also a novel phase above BEC: a coherent magnonic liquid phase. We have succeed investigating the magnetic peak in the BEC state at 2 K in our previous proposal. Now, we propose to perform similar measurements at higher temperatures and investigate the magnonic liquid phase.