Scientific Anglers Amplitude Smooth Infinity Fly Line

Overview

Built as a general purpose freshwater taper, the SA Amplitude Smooth Infinity carries an AST Plus slickness coating and a half-size heavy, extended-head design meant to load fast-action rods.

Scientific Anglers markets this as a do-everything freshwater taper rather than a specialist line, suited to species from trout and panfish up to steelhead and salmon. The half-size heavy build is meant to load fast-action rods more readily than a standard-weight line would.

• AST Plus coating for reduced guide friction
• General purpose taper for trout, bass, panfish, salmon, and more
• Half-size heavy build for fast-action rods
• Extended head length for distance and mending

Who it's for

Fits freshwater fly anglers who want one line to cover trout, bass, panfish, and larger species like steelhead or salmon on a fast-action rod. Anglers who fish saltwater primarily or need a line matched exactly to standard weight ratings may want a different taper.

Pros and cons

Performance notes

The AST Plus additive is a slickness treatment applied to the line's coating, intended to cut friction through the rod guides for smoother shooting on longer casts. Because the line is built a half-size heavy, it loads fast-action rods faster than a line matched to standard weight, a tradeoff on a slower or medium-action rod. The extended head length is meant to aid mending once line is out on the water.

Specifications

Closest rivals on specs

CORTLAND 444 Fly Line 90 FT

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RIO Premier Gold Fly Line

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