Scientific Anglers
Scientific Anglers Amplitude Infinity Fly Line
Scientific Anglers Amplitude Infinity Fly Line
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DESCRIPTION & FEATURES
DESCRIPTION & FEATURES
THE GO-TO LINE FOR ALL FRESHWATER SPECIES
The first series of lines to feature the revolutionary AST PLUS slickness additive, the Amplitude series will shoot farther and last longer than any other line on the market. It’s slickness down to a science.
The conventional wisdom in fly fishing is that there’s no such thing as a “do it all” freshwater line. We have something to say about that. The Amplitude Infinity has the power to bomb out streamers, yet retains delicacy for dry flies. It mends like an absolute dream, and delivers flies at all distances. Built a half-size heavy, with a long head and substantial front taper, it’s perfect for everything from trout and panfish to pike and steelhead. There’s a reason we call it the Infinity: there is no end to what you’ll be able to do with it.
- Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
- Floating Texture on the tip section for the ultimate in flotation; it simply keeps dry flies floating longer
- Shooting Texture running line delivers longer casts, thanks to a reduction in friction
- Extremely versatile general-purpose taper designed for most freshwater species; an excellent 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
- SA AMP INFINITY WF X F (X = line weight)
TAPER DIAGRAM
APPLICATIONS
SPECIFICATIONS
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* Grain weight for the first 30′




At Spawn Fly Fish, we’re proud to carry a handpicked selection of products for anglers of all levels. Explore top brands like Sage, Redington, Douglas LRS, Ross Reels, and more. Whether you’re tying with Shrimp Eyes, crafting with Unreal Dubbing, or looking for Loctite Super Glue Extra Time Control to secure your creations, you’ll find everything you need here.We also stock a wide range of fly tying materials, fly rods, and fly reels—including favorites like Tibor Fly Reels, Lamson Fly Reels, and Redington Fly Reels. For complete guides on where and how to use your new gear, check out our Fly Fishing Guide to Washington or browse our blog or YouTube channel for in-depth product tips and tutorials
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FREE SHIPPING
Free shipping on orders over $49 to the contiguous US
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FREE RETURNS
We stand behind our products. Return shipping is free on all returns shipped from within the United States
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2% PLEDGE
2% of all Spawn profits are donated to conservation groups. This has been true since our 1st day of business