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Your cart is empty.The Amplitude Smooth series of lines are 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. This is the “do it all” freshwater line. 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. The reason it's called the Infinity: there is no end to what you’ll be able to do with it!
Steve Spencer
2025-09-03 19:20:37
The welded look broke. Broke on the first day using it which cost me maybe a 16†brown trout. Will be contacting the manufacturer and distributor KingfisherContacted Sci Anglers and they shipped one out to me right away. No cost for the replacement and no frustrating policy like sending the old one back. Line has been great since Replacement. Landing many wild browns with this replacement line.
WillyT
2025-09-01 11:08:27
Awesome line. Far exceeded my expectations! Casts great and just enough flex in the line to keep fish pinned, even with light leaders.
Mike Hart
2025-07-25 12:59:19
Casts well. Pleasure to use
Customer
2025-07-21 10:52:04
Best fly line I’ve ever used. Save the $30 and get the “smooth†instead of the more expensive “texturedâ€. They claim the textured floats better for dry flys. However, I’ve never noticed a difference and the textured feels funny sliding through the eyes of the rod.
james_2scomplement
2025-07-07 20:32:12
This line is truly slick, and requires less overhang when casting for the same distance, therefore fewer false casts.
Charles A.
2025-05-26 20:23:35
Cast's like a dream on my Hardy Zephyrus 4 wt. rod. Very thin line that cuts through the wind easily. Also flows through the guides without any noise. Very excited to have this for the next couple of years.
Jerry Clement
2025-05-09 18:04:02
Line flow through the eyes was super smootb
Calvin Taylor
2025-03-13 13:33:26
I just purchased a spool of amplitude smooth infinity so far it is complete crap. The line came on a carboard spool was murder to get on my fly reel and feels like a limp noodle. I honestly believe if walmart had a house brand fly line it would be better than this junk. I had the sciencetific anglers frequency fly line on my8wt and it was much better than this junk. Do yourself a favor and stay away from this junk the only thing that would be worse than amplitude smooth infinity would be twain rope.
michael m.
2025-01-15 18:29:30
Great line have it on my #6 casts great mends great floats great shoots great use it for hopper dropper rigs and indicator rigs. Bought the #5 for my other rod for dry flies. Just can't say enough about this line highly recommend it and it was a good price.
Gary Hay
2025-01-11 21:06:19
Good quality slick fly line casts very well
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