From the hi fi+ review of the Spirit:
"Output is healthy and loading is fine at the popular 100ohm value. Tracking should be set at 2g, but you'll need to set the bias by ear, as even slight adjustments around the 2g mark made obvious differences to the focus and transparency of the sound. Finally the Spirit is the most VTA sensitive cartridge I have come across. Seemingly insignificant changes in arm height can have a huge impact on the sound quality and especially the sense of life. Precise VTA adjustment is a must, and you should take that into account when considering arm matching."
Although adjusting the spring tension on your Gyro for proper "bounce" should not change the relation of the arm/cartridge to the playing surface, I would look at the VTA first, and other alignment issues next. High gain on the Jarrah and your loading should be fine for the Spirit.
"Output is healthy and loading is fine at the popular 100ohm value. Tracking should be set at 2g, but you'll need to set the bias by ear, as even slight adjustments around the 2g mark made obvious differences to the focus and transparency of the sound. Finally the Spirit is the most VTA sensitive cartridge I have come across. Seemingly insignificant changes in arm height can have a huge impact on the sound quality and especially the sense of life. Precise VTA adjustment is a must, and you should take that into account when considering arm matching."
Although adjusting the spring tension on your Gyro for proper "bounce" should not change the relation of the arm/cartridge to the playing surface, I would look at the VTA first, and other alignment issues next. High gain on the Jarrah and your loading should be fine for the Spirit.
