INVELOX is a wind delivery system suitable for wind power harnessing. One of its innovative features is its capability of incorporating multiple wind turbine generator systems in the Venturi section. INVELOX captures wind flow through an omnidirectional intake or multi-unidirectional intakes and thereby there is no need for a passive or active yaw control to orient the wind turbine. It accelerates the flow within the Venturi section which is subsequently expanded and released into the ambient environment through a diffuser. This allows for harnessing wind power at multi stages. When two or three turbines are in the Venturi section, the second and third turbine harness the wind power that otherwise cannot be harnessed by the first turbine due to its power conversion limitations. The objective of the present work is to report on measured performance of the system when single, double and triple turbines are placed in the Venturi section. The results show that it is possible to harness wind power using multi-stage turbine configurations and therefore increase the total harnessed power of the system.