Scientific Anglers Amplitude Smooth Fly Lines

Here’s the straight talk: Amplitude Smooth lines with AST Plus are the highest-floating, longest-lasting, premium smooth fly lines on the market. They last twice as long as the closest competitor, and have up to five times less friction. These lines are, simply put, a nesting doll full of slickness that stay slick every time you open one of those scary little dolls right up. Amplitude Smooth lines feature welded loops on both ends for easy rigging and come in three colors, to identify the front taper and end of the head so you’ll know when to pick up your line and cast. Each line also features the SA•ID system that tells you exactly which line this is once it’s on your reel. You want the best smooth lines in the world? Well, I don’t know why you’d look anywhere else.

 

Amplitude Smooth Infinity

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 Smooth 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:

  • For use in cold to moderate climates
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Extremely versatile general-purpose taper designed for most freshwater species
  • 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
  • Braided multifilament core
  • SA ID - SA AMP SMTH INFINITY WF X F (X = line weight)

Line weight Head length Total length Grain weight
WF3F 47.0' 90.0' 110
WF4F 48.0' 90.0' 130
WF5F 49.0' 90.0' 150
WF6F 50.0' 90.0' 175
WF7F 51.0' 90.0' 200
WF8F 52.0' 90.0' 225

 

Product video:

 

Amplitude Smooth Infinity Glow

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 Smooth 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:

  • For use in cold to moderate climates
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Extremely versatile general-purpose taper designed for most freshwater species
  • 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
  • Nightime-glow tip section for visibility
  • Braided multifilament core
  • SA ID - SA AMP SMTH INFNTY WF X F (X = line weight)

Line weight Head length Total length Grain weight
WF3F 47.0' 90.0' 110
WF4F 48.0' 90.0' 130
WF5F 49.0' 90.0' 150
WF6F 50.0' 90.0' 175
WF7F 51.0' 90.0' 200
WF8F 52.0' 90.0' 225

 

Amplitude Smooth Trout

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:

  • For use in cold to moderate climates
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Excels in medium-to-long distances with dry flies and smaller nymphs; wonderful on glass and bamboo
  • The best smooth, true-to-grain-weight line for casting small dry flies to picky risers
  • Designed specifically for chasing trout; also useful for grayling and panfish
  • Elongated front taper is designed for delicate presentations
  • Braided multifilament core
  • SA ID - SA AMP SMTH TROUT WF X F (X = line weight)

Line weight Head length Total length Grain weight
WF2F 64.0' 90.0' 90
WF3F 64.0' 90.0' 100
WF4F 66.0' 90.0' 120
WF5F 68.0' 90.0' 140
WF6F 70.0' 90.0' 160
WF7F 72.0' 90.0' 185

 

Product video:

 

Amplitude Smooth Creek Trout

The Creek Trout Taper is designed for casting in small creeks where your average weight forward lines doesn’t make the cut. The rear loaded short-bellied fly line with an extended handling section. That means more mass is distributed to the front of the line, which assists in turning over weighted flies and performing roll casts.

Features:

  • For use in cold to moderate climates
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Short-head design with handling line delivers flies at short-to-medium range with extended line control
  • Built one full size heavy 
  • Turns over weighted nymphs and streamers, yet offers light presentations when used with long leaders
  • SA ID - SA AMP S CREEK TROUT WF X F  (X = line weight)

Line weight Head length Total length Grain weight
WF2F 64.0' 90.0' 90
WF3F 64.0' 90.0' 100
WF4F 66.0' 90.0' 120
WF5F 68.0' 90.0' 140
WF6F 70.0' 90.0' 160
WF7F 72.0' 90.0' 185

 

Amplitude Smooth Anadro/Nymph

If you’re anything like us, the allure of big fish and big rivers is intoxicating. That’s precisely why we created the Amplitude Smooth Anadro/Nymph. Designed with line control in mind, its extended rear taper allows you to cast a mile, mend with authority, and turn over nearly any rig imaginable—from dredging double nymphs to larger dry-dropper concoctions. Steelhead, salmon, and trout won’t know what hit them.

Features:

  • For use in cold to moderate climates
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Long rear taper for extended line control and long-distance casting; the best nymphing taper we offer
  • An unbelievable indicator line for double-nymph rigs or hopper-droppers
  • Overweighted by 1.5 sizes to assist in turning over heavy rigs; use designated line weight for your rod
  • Use one size heavy for switch rods
  • Braided multifilament core
  • SA ID - SA AMP SMTH ANADRO WF X F (X = line weight)

Line weight Head length Total length Grain weight
WF4F 60.0' 100.0' 150
WF5F 60.0' 100.0' 175
WF6F 60.0' 100.0' 200
WF7F 61.0' 100.0' 225
WF8F 62.0' 100.0' 260
WF9F 63.0' 100.0' 305

 

Product video:

 

Amplitude Smooth Anadro Stillwater Indicator

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.

Features:

  • For use in cold to moderate climates
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Features alternating high viz color bands at the tip, for easy tracking and strike detection
  • Overweighted by 1.5 sizes to assist in turning over long leaders with large indicators
  • Ideal for big river and stillwater indicator fishing
  • Braided multifilament core  
  • SA AMP SMTH STLLWTR WF X F (X = line weight)

Line weight Head length Total length Grain weight
WF5F 60.0' 100.0' 175
WF6F 60.0' 100.0' 200
WF7F 61.0' 100.0' 225
WF8F 62.0' 100.0' 260

 

Amplitude Smooth Titan Long

You’ve got articulated streamers hanging from the lampshade on your desk. You think in terms of black, white, or olive. The term conehead doesn’t refer to an old comedy sketch. We totally get it. And that’s why we designed the Amplitude Smooth Titan Long. Similar in design to our Titan taper, but with an extended rear taper for better mending ability and more line control, it’s quite possibly the best warmwater fly line ever constructed. If you have an all-encompassing need to throw big flies for big fish, then look no further. This fly line is made for you.

Features:

  • For use in cold to moderate climates
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Designed for throwing streamers at trout and other freshwater targets
  • Powerful head loads quickly and delivers large flies to distant targets
  • Built two sizes heavy for turning over big rigs; use designated line weight for your rod
  • Extended rear taper for line control and mending ability
  • Ideal line for boat or wade fishing
  • Braided multifilament core
  • SA ID - SA AMP SMTH TTN LNG WF X F (X = line weight)

Line weight Head length Total length Grain weight
WF5F 43.0' 90.0' 185
WF6F 43.0' 90.0' 210
WF7F 43.0' 90.0' 240
WF8F 43.0' 90.0' 280
WF9F 43.0' 90.0' 330
WF10F 43.0' 90.0' 380

 

Product video:

 

Amplitude Smooth Infinity Salt

The Infinity Salt is technical, versatile, accurate and simply the most advanced saltwater line available. Featuring the revolutionary AST Plus slickness additive for superior shooting ability and increased durability the Infinity Salt will handle the most rigorous of conditions year after year. The Infinity Salt is a half line weight heavy to turn over any fly on even the windiest of days. The extended head length makes it more accurate then short shooting heads so that you can land your fly to spooky fish in the most efficient manner.

Features:

  • Tropi-Core technology remains stiff and slick in tropical environments
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Made half size heavy turns over large flies on windy days
  • Extended head length for accuracy at distance
  • High-contrast sighter to identify the back of the line when fighting fish on long runs
  • SA ID - SA AMP S INFINITY SW WF XX F (X = line weight)

Line weight Head length Total length Grain weight
WF7F 48.0' 100.0' 200
WF8F 49.0' 100.0' 225
WF9F 50.0' 100.0' 260
WF10F 51.0' 100.0' 305
WF11F 52.0' 100.0' 355
WF12F 53.0' 100.0' 415

 

Amplitude Smooth Grand Slam

Tarpon. Bonefish. Permit. All in one day. All on one fly line. That’s the idea behind the Amplitude Smooth Grand Slam, a line designed specifically to help you achieve one of angling’s most elusive accomplishments. With a short, powerful head the Grand Slam cuts through wind and turns over crabs, shrimp, and tarpon toads with ease. We’ve got the line. You just need the fish.

Features:

  • Tropi-Core technology remains stiff and slick in tropical environments
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • The perfect line for bonefish, tarpon, and permit on the flats; also great for snook, redfish, and sea trout
  • Overweighted by .75 sizes to load rods quickly; use designated line weight for your rod
  • Short, powerful head turns over long leaders with heavy flies
  • Tropi-Core technology remains stiff and slick in tropical environments
  • SA ID - SA AMP SMTH GR SLAM WF X F (X = line weight)

Line weight Head length Total length Grain weight
WF6F 40.0' 100.0' 180
WF7F 40.0' 100.0' 205
WF8F 40.0' 100.0' 235
WF9F 40.0' 100.0' 270
WF10F 40.0' 100.0' 320
WF11F 40.0' 100.0' 370
WF12F 40.0' 100.0' 435

 

Product video:

 

Amplitude Smooth Bonefish

A day of bonefishing will either be the most fun you’ve had with a fly rod or the most frustrating day of your life. Take some of the chance out of the equation with the Amplitude Smooth Bonefish. Built on a stiff core for tropical conditions, and featuring our AST Plus slickness additive, the Bonefish taper is designed with a long, compound head for casting accuracy and delicate deliveries to fish that you’ll swear have a sixth sense.

Features:

  • Tropi-Core technology remains stiff and slick in tropical environments
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Revised taper for delicate deliveries to skittish fish in crystal-clear water
  • Loads fast and lands light for increased accuracy
  • Medium-length head for line control and optimal casting and fishing at 60-80 feet
  • SA ID - SA AMP SMTH BONEFISH WF X F (X = line weight)

Line weight Head length Total length Grain weight
WF5F 43.0' 90.0' 185
WF6F 43.0' 90.0' 210
WF7F 43.0' 90.0' 240
WF8F 43.0' 90.0' 280
WF9F 43.0' 90.0' 330

 

Product video:

 

Amplitude Smooth Tarpon

There is absolutely nothing in fly fishing quite like seeing a tarpon inhale your fly, leap toward the heavens, and race like a madman for the horizon. In order to make that happen, you’ll need help: the Amplitude Smooth Tarpon. Designed with a short head for quick shots, this is the perfect line for casting flies to tarpon of all shapes, sizes, and temperaments. Just remember to bow to the king when it jumps.

Features:

  • Tropi-Core technology remains stiff and slick in tropical environments
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • High contrast sighter to identify the back of the line when fighting fish on long runs
  • Loads fast, shoots quickly, lands softly for wary fish
  • Stealthy color scheme
  • Reinforced 45lb big-game core
  • SA ID - SA AMP SMTH TARPON WF XX F (X = line weight)

Line weight Head length Total length Grain weight
WF10F 36.0' 100.0' 285
WF11F 36.0' 100.0' 340
WF12F 36.0' 100.0' 395

 

Amplitude Smooth Redfish Cold

Let’s get this out of the way: catching a tailing redfish might be the greatest thing in the world. Just make sure you have the right line for the job. Our Amplitude Smooth Redfish Cold line is designed with a short head for quick shots, which is exactly what you’ll need when you’re poling through a marsh in 10 inches of water on a freakishly chilly fall evening.

Features:

  • For use in cold to moderate climates
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Short front taper and head for quick, powerful casts
  • Made a half-size heavy to deliver large flies in demanding situations
  • Warm and cold version available to cover both summer and winter 
  • SA ID - SA_AMP_S_REDFISH_COLD_WF_XX_F  (X = line weight)

Line weight Head length Total length Grain weight
WF8F 31.0' 100.0' 225
WF9F 31.0' 100.0' 260
WF10F 31.0' 100.0' 305

 

Amplitude Smooth Redfish Warm

Let’s get this out of the way: catching a tailing redfish might be the greatest thing in the world. Just make sure you have the right line for the job. Our Amplitude Smooth Redfish Warm fly line is designed with a short head for quick shots, which is exactly what you’ll need when you’re poling through a marsh in 10 inches of water on a brutally hot summer afternoon.

Features:

  • Tropi-Core technology remains stiff and slick in tropical environments
  • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
  • Short front taper and head for quick, powerful casts
  • Made a half-size heavy to deliver large flies in demanding situations
  • Warm and cold version available to cover both summer and winter 
  • SA ID - SA_AMP_S_REDFISH_WARM_WF_XX_F  (X = line weight)

Line weight Head length Total length Grain weight
WF6F 31.0' 100.0' 175
WF6F 31.0' 100.0' 200
WF8F 31.0' 100.0' 225
WF9F 31.0' 100' 260