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Scientific Anglers Amplitude Smooth Trout Fly Line


One of our favourite presentation lines. Super slick, accurate and a must try line.


The Amplitude Smooth series of lines are, simply put, the highest-performance smooth fly lines in the world. With up to five times less drag and eight times the durability of traditional lines, this will change the way you look at fly line performance. There’s a sipper 40 feet away and he looks like he’s eating tricos. The natural rhythms of the rise and the river begin to make sense, so you ready yourself to cast. In that moment, you shouldn’t be thinking about your fly line, because you should trust it implicitly. In that moment, you need the Amplitude Smooth Trout taper. Featuring our unparalleled AST Plus slickness additive, the Amplitude Smooth Trout is designed specifically for precise presentations and those who love dry flies.


  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Extremely versatile general-purpose taper designed for most freshwater species; an excellent fly line for trout, grayling, panfish, bass, carp, steelhead, salmon, and pike
  • 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
  • Available in two color schemes: standard and camo; the camo scheme features a mottled front taper for increased stealth
  • For use in moderate and cold climates
  • Braided multifilament core

Customer Reviews

Based on 2 reviews
slick, smooth and quick.

I selected the amplitude for my stillwater set up because sometimes those extra metres matter. It's only been a couple of outings but it does pick up off the water with ease and shoots like a dream. The ability to lift up, one back cast and shoot is perfect for getting the fly out in front of the fish, whether its mooching browns or sprinting rainbows. Where speed and distance matter well worth the coin.

Philip FFNE
S.A Amplitude Smooth Trout Fly Line

As anticipated, this is a quality line and delivers at the level you would expect. Have never had issues with longevity of SA lines and don't expect I will with this purchase either.