Last year my Ramirez guitar originally came with medium tension strings at my request. The Ramirez website recommended high tension strings so I ordered some sets for my Estudio-3. They produced a much better tone and volume.
The exquisite sound quality of the Ramirez high tension strings provided with my recent acquisition of the Jose Ramirez Studio 3 classical guitar, prompted me to purchase additional sets. Thank you Geoff and XGuitars