Scientific Anglers Amplitude Textured Infinity

The One Line to Rule Them All—With Bite.

The SA Amplitude Textured Infinity is the ultimate do-everything trout line for anglers who demand power, finesse, and unmatched durability. With a half-size heavy taper and extended rear section, it loads modern rods quickly while still offering superior loop control, roll casting ability, and delicate presentations.

What makes this version shine is the textured AST Plus coating—it’s slicker than any smooth line on the market and lasts significantly longer. The micro-texture reduces friction for longer casts, improves floatation, and sheds water for cleaner pickups—all while making a signature “zip” sound you’ll either love or fear.

🎯 Why We Like It

• Half-size heavy taper = versatile power for nymphs, dries, and streamers

• Extended rear taper for mending and control at distance

• AST Plus textured coating = max durability and effortless shooting

• Best all-around line for anglers who fish a little bit of everything

• Welded loops front and rear for quick leader swaps

🛠️ Tech Specs

• Taper: Weight Forward, half-size heavy

• Core: Braided multifilament

• Coating: AST Plus (textured)

• Application: Versatile trout and general freshwater use

• Ideal Rod Match: Fast to moderate-fast action rods

• Loops: Welded front and rear

🧠 Pro Tip:

If you want one line to cover dry flies, indicator rigs, and light streamers—this is it. Match it to a 5wt or 6wt fast rod, and you’ll be ready for just about anything short of saltwater.

• Cold to Medium temperature
• Dries, Nymphs, Streamers, Poppers/Big Dries, Indicator