Scientific Anglers Amplitude Smooth Infinity Warm line is a versatile line that can handle both streamers and dry flies with ease. It features a unique Amplitude smooth finish that allows it to shoot farther, last longer, and provide a better casting experience than any other line on the market. The line is built a half-size heavy, with a long head and substantial front taper, making it suitable for a wide range of fish species such as trout, yellowfish, bass, barbel and carp. The name Infinity reflects its versatility, you’ll be able to do it all with this line. With its ability to mends like a dream and delivers flies at all distances, it is the perfect line for all your freshwater fishing needs.

The Scientific Anglers Amplitude Smooth Infinity Warm features an innovative dual technology, combining a cold water core with a warm water coating. This translates into a line that will maintain its integrity in environments where the water temperature remains cool, but the air and deck temperatures are high.

The Amplitude Smooth series of fly lines by Scientific Anglers are the ultimate high-performance smooth lines, they offer up to five times less drag and eight times the durability of traditional fly lines. These lines will completely change your perspective on fly line performance and elevate your fishing experience to the next level. Upgrade to the world’s highest-performance smooth fly lines with the Amplitude Smooth series.


  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Made a half-size heavy to load fast-action rods, but works well with a variety of rod actions
  • Extended head length for long-distance casts and superior mending ability
  • Excellent for dry flies, nymphs, and streamers
  • For use in moderate and warm climates
  • Braided multifilament core
  • SA AMP S INFNTY WARM WF X F (X = line weight)


WF-5-F 48.0’/14,6m 90.0’/27,4m 225gr/14,6g 150gr / 9,8g
WF-6-F 49.0’/14,9m 90.0’/27,4m 265gr/17,2g 175gr / 11,2g
WF-7-F 50.0’/15,2m 90.0’/27,4m 305gr/19,8g 200gr / 12,8g
WF-8-F 51.0’/15,5m 90.0’/27,4m 350gr/22,7g 225gr / 14,5g
WF-9-F 52.0’/15,8m 90.0’/27,4m 395gr/25,6g 260gr / 16,8g



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