Great fly line
"Floats well, good sensitivity and holds up well to use. I have been using this same line for a few years and it’s still holding well. You get what you pay for USA made high quality fly line."
Description
It's hard to make a freshwater fly line that does everything well. SA designed the Amplitude Smooth Infinity line for anglers who value versatility and performance. This line is built for nymphs, streamers, dry flies, and really any typical freshwater angling scenario. With a versatile taper and built a half-size heavy, this is truly a line that works on most rods and in most angling applications. SA loaded this line with features including a camo tip that encourages stealthy presentations, and it's easy to see why this line has received so many awards since its release. Freshwater anglers who are looking for a line that provides ultimate versatility and incredible performance, this is the line for you.
Features
AST Plus Slickness - SA has built a number of important features into this line. AST Plus Slickness allows anglers to quickly shoot line with friction-minimizing performance. Welded loops on both ends allow easy leader/backing attachment. A braided multifilament core is strong and supple for versatility and durability. While the Amplitude Smooth doesn't have the textured shooting and running line that the Amplitude version has, it does have the same camo tip that allows delicate and stealthy presentations to spooky fish.
Uses
Versatile Freshwater - The Amplitude Smooth Infinity is SA's 'do-it-all freshwater fly line offering'. This line is built for a variety of freshwater angling scenarios and works well when partnered with nymphs, streamers, dry flies, and more. It strikes a nice balance between delicacy at longer distances and a taper that can load fast-action rods at short range. While it doesn't do one thing particularly well, it's built to do everything so you never have to worry about having multiple lines on the river. This is a great line for beginners and experts alike who want a freshwater fly line that will allow them to use a multitude of techniques on the water.
Temp
Cold/Moderate - This line is made to be used in cold and moderate climates including freshwater streams and rivers, lakes almost any climate. That being said, this line will turn limp in tropical climates and isn't meant to be used in high heat.
Taper/Weight
Half Size Heavy, Versatile Taper - The Amplitude Smooth Infinity fly line is built a half-size heavy which means the WF5F version of the line has a grain weight of 150gr in the first 30' of the line with an overall 30' weight of 9.8 grams. The head length on the 5wt version of the line is 49' which means that this line can load fast-action rods at short range but also has the versatility to carry line in the air and present smaller flies at longer distances. SA built this line to have a versatile all-around taper and the measurements confirm that effort.
More Info
Best for: Freshwater 
Loops: Front Loop (Leader to Fly Line Connection) and Back Loop (Backing to Fly Line Connection)
Sinking/Floating: Floating
Other Resources
2020 Tropical Saltwater Fly Line Shootout & Buyer's Guide
Fly Line Temps: Tropical Vs. Coldwater
Freshwater Fly Line Shootout & Buyer's Guide
Line Specs
| Line Code | Color | Total Length | Head Weight | Sink Rate | Buy |
|---|---|---|---|---|---|
| WF3F | Optic Green/Mist Green/Buckskin | 90ft | 110gr | Floating | |
| WF3F | Camo - Bamboo/Buckskin/DK Willow | 90ft | 110gr | Floating | |
| WF4F | Optic Green/Satin Orange/Creamsicle | 90ft | 190gr | Floating | |
| WF4F | Optic Green/Mist Green/Buckskin | 90ft | 130gr | Floating | |
| WF4F | Camo - Bamboo/Buckskin/DK Willow | 90ft | 130gr | Floating | |
| WF5F | Optic Green/Satin Orange/Creamsicle | 90ft | 225gr | Floating | |
| WF5F | Optic Green/Mist Green/Buckskin | 90ft | 150gr | Floating | |
| WF5F | Camo - Bamboo/Buckskin/DK Willow | 90ft | 150gr | Floating | |
| WF6F | Optic Green/Satin Orange/Creamsicle | 90ft | 265gr | Floating | |
| WF6F | Optic Green/Mist Green/Buckskin | 90ft | 175gr | Floating | |
| WF6F | Camo - Bamboo/Buckskin/DK Willow | 90ft | 175gr | Floating | |
| WF7F | Optic Green/Mist Green/Buckskin | 90ft | 200gr | Floating | |
| WF7F | Camo - Bamboo/Buckskin/DK Willow | 90ft | 200gr | Floating | |
| WF8F | Optic Green/Mist Green/Buckskin | 90ft | 225gr | Floating | |
| WF8F | Camo - Bamboo/Buckskin/DK Willow | 90ft | 225gr | Floating |
Line Code:
WF3F
Color:
Optic Green/Mist Green/Buckskin
Total Length:
90ft
Head Weight:
110gr
Sink Rate:
Floating
Line Code:
WF3F
Color:
Camo - Bamboo/Buckskin/DK Willow
Total Length:
90ft
Head Weight:
110gr
Sink Rate:
Floating
Line Code:
WF4F
Color:
Optic Green/Satin Orange/Creamsicle
Total Length:
90ft
Head Weight:
190gr
Sink Rate:
Floating
Line Code:
WF4F
Color:
Optic Green/Mist Green/Buckskin
Total Length:
90ft
Head Weight:
130gr
Sink Rate:
Floating
Line Code:
WF4F
Color:
Camo - Bamboo/Buckskin/DK Willow
Total Length:
90ft
Head Weight:
130gr
Sink Rate:
Floating
Line Code:
WF5F
Color:
Optic Green/Satin Orange/Creamsicle
Total Length:
90ft
Head Weight:
225gr
Sink Rate:
Floating
Line Code:
WF5F
Color:
Optic Green/Mist Green/Buckskin
Total Length:
90ft
Head Weight:
150gr
Sink Rate:
Floating
Line Code:
WF5F
Color:
Camo - Bamboo/Buckskin/DK Willow
Total Length:
90ft
Head Weight:
150gr
Sink Rate:
Floating
Line Code:
WF6F
Color:
Optic Green/Satin Orange/Creamsicle
Total Length:
90ft
Head Weight:
265gr
Sink Rate:
Floating
Line Code:
WF6F
Color:
Optic Green/Mist Green/Buckskin
Total Length:
90ft
Head Weight:
175gr
Sink Rate:
Floating
Line Code:
WF6F
Color:
Camo - Bamboo/Buckskin/DK Willow
Total Length:
90ft
Head Weight:
175gr
Sink Rate:
Floating
Line Code:
WF7F
Color:
Optic Green/Mist Green/Buckskin
Total Length:
90ft
Head Weight:
200gr
Sink Rate:
Floating
Line Code:
WF7F
Color:
Camo - Bamboo/Buckskin/DK Willow
Total Length:
90ft
Head Weight:
200gr
Sink Rate:
Floating
Line Code:
WF8F
Color:
Optic Green/Mist Green/Buckskin
Total Length:
90ft
Head Weight:
225gr
Sink Rate:
Floating
Line Code:
WF8F
Color:
Camo - Bamboo/Buckskin/DK Willow
Total Length:
90ft
Head Weight:
225gr
Sink Rate:
Floating
Overall rating: 4.9333334 / 5 from 15 reviews.
AI Generated Review Summary
Summary topics
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Review highlights
Reviews
Great line
"Great line , great shop with quick service."
Great line for casting long
"Great line for casting long with fast action rods!!"
"Very nice"
Best line I’ve owned
"Great on my Recon"
Great line so far. I
"Great line so far. I got this last week as a new go-to line in my fairly minimalist 6 wt setup. I've casted nymphs/eggs for about 8 hours with it so far and caught a bunch of small trout on a med-size tailwater. It does well turning over a long two-nymph indicator rig for deeper runs. Casts well with water hauls and double-hauls. Picks up cleanly off the water. Roll casts OK but not really made for that. Judging by how it turns over the indicator taper, I can feel that it should be a nice line for shooting dries."
Very nice
"Had considered going to a slower rod because of trouble casting. Jared recommended trying the SA Amplitude Infinity Smooth first. My casting improved immediately. Still needs works but I’m getting there and this line has helped."
Fly line
"SA infinity smooth #7 floating. Excellent fly line."
Deborah K. Lewis Facilities Manager Work Dynamics
"A solid true-to-weight line. Love this on my Trout LL"
Great for bass and crappie on the Gulf Coast
"I purchased the SA Amplitude Smooth, freshwater floating line, Infinity Warm, 5 wt and have been casting on a Douglas DXF 9’ #5. I was looking for a warm freshwater floating water line that could turn over moderate deer hair bass bugs but also manage more subtle presentations for perch, crappie, and sand bass. Basically, I was looking for the SA warm freshwater equivalent to SA’s Grand Slam taper which I am fond of using for my #8 and #9. The line performs excellently, delivering tight loops, cutting wind, turning over moderately big flies, and delivering subtle presentation of small flies. I would highly recommend to anyone in search of a jack-of-all-trades line for bass and crappie on the Gulf Coast."