Scientific Anglers Amplitude Smooth Stillwater Indicator
The Amplitude Smooth series delivers the highest-performance smooth fly lines available, offering up to five times less drag and eight times the durability of traditional fly lines.
- Features AST Plus slickness additive for superior shooting ability and increased durability
- Alternating high visibility 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
- Designed for moderate to cold climate use
- Braided multifilament core construction
| Specification | Detail |
|---|---|
| Line Weight | SA AMP SMTH STLLWTR WF X F (X = line weight) |
| Drag Reduction | Up to five times less drag |
| Durability | Eight times more durable than traditional lines |
| Core Type | Braided multifilament |
| Climate Suitability | Moderate to cold climates |
FAQ
What makes the Amplitude Smooth line different from traditional fly lines?
The Amplitude Smooth line uses a revolutionary AST Plus slickness additive, providing superior shooting performance and increased durability. It also features up to five times less drag and eight times greater durability than traditional lines.
Is this line suitable for stillwater fishing?
Yes, this is specifically designed as a stillwater indicator line with alternating high visibility color bands for easy strike detection.
Does the line come with a specific weight designation?
Yes, the line weight is indicated by ‘X’ in the model name (SA AMP SMTH STLLWTR WF X F), where X represents the line weight. The exact weight should be specified by the user based on their fishing setup.


Richard Paterson –
This line performs exceptionally well in cold water conditions. The high visibility bands make it easy to detect strikes, and the smoothness reduces drag significantly. I’ve used it with a 1.5-size overweight leader and it handles long leaders without issues.
Charles Paterson –
The drag reduction is noticeable during casting. The color bands are clear and stand out even in low light. I appreciate the durability—after several seasons of use, it still performs as expected.
Brandon Ellison –
Great for stillwater fishing. The shooting performance is smooth and the indicator tip is easy to track. A bit more expensive than standard lines, but the performance justifies the cost.
Victoria Knox –
I switched from a traditional line to this model and noticed a significant improvement in casting distance and control. The durability has held up well in cold weather conditions.