Scientific Anglers Amplitude Infinity Fly Line – Textured
The first series of lines to feature the revolutionary AST PLUS slickness additive, the Amplitude series will shoot farther and last longer than any other line on the market. It’s slickness down to a science.
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 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.
| Specifications |
|---|
| Line Type: Fly Line |
| Weight: Half-size heavy |
| Head Length: Long head |
| Front Taper: Substantial |
| Application: Trout, panfish, pike, steelhead |
| Key Feature: AST PLUS slickness additive |
FAQ
What makes the Amplitude Infinity different from other fly lines?
It features the AST PLUS slickness additive, which improves casting distance and durability. The long head and substantial front taper allow it to perform well with both streamers and dry flies.
Is the Amplitude Infinity suitable for both trout and larger game fish?
Yes, it is designed for use with trout, panfish, pike, and steelhead due to its balanced performance across different fishing scenarios.
How does the line perform in terms of mending?
The Amplitude Infinity mends like an absolute dream, providing smooth and reliable transitions when casting.



Colin Lyman –
I’ve tried several fly lines for my trout and panfish fishing, but the Amplitude Infinity stands out. It casts smoothly and handles both dry flies and streamers well. The mending is excellent, and I notice it lasts longer than previous lines I’ve used.
Caroline Churchill –
This line is a game-changer for my weekend fishing trips. The texture and slickness make it easy to cast long distances without losing accuracy. I use it for steelhead too, and it performs consistently.
Keith Skinner –
Great balance between power and sensitivity. I appreciate how it works well with both light and heavier flies. A bit heavier than expected, but that suits my fishing style.
Boris Knox –
The AST PLUS additive really makes a difference. I can cast farther and feel less drag when retrieving. It’s durable and performs well in windy conditions.
Dan Short –
I use this line for both morning and afternoon fishing. It handles dry flies with finesse and still delivers streamers effectively. The only minor issue is the initial break-in period, but it settles in quickly.