This comprehensive review dives into the Scientific Anglers Amplitude fly line series, specifically examining the Infinity WF7 and Trout WF5 models. We'll unpack the lines, analyze their key features, and assess their performance in various fishing scenarios. From initial impressions of packaging and quality to detailed explorations of casting performance and durability, this review provides a thorough assessment for anglers considering an upgrade or addition to their fly fishing arsenal.Expect a detailed look at the innovative AST+ (Advanced Slickness Technology Plus) additive, its impact on line life and castability, and the practical benefits of the clearly marked line ID. We'll also explore the differences between the all-purpose Infinity WF7, ideal for a wide range of species and techniques, and the more delicate Trout WF5, designed for precision presentations in technical fishing situations. Ultimately, this review aims to help you determine which Amplitude line best suits your individual needs and fishing style.
Pros And Cons
- Slickness additive makes the line last longer.
- Allows for longer casts.
- Line ID printed on the line for easy identification of type and weight.
- Versatile for various species (carp, panfish, etc.).
- Braid multifilament core keeps line sturdy in cold water and prevents limpness.
- Color coding helps judge casting distance.
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Unboxing the Amplitude Lines
The video begins by unboxing two Scientific Anglers Amplitude fly lines: the Infinity WF7 and the Trout WF5. The packaging is simple yet informative, clearly displaying the line type and weight. The initial impression is one of high quality and attention to detail.

Both lines feature AST+ (Advanced Slickness Technology Plus), a slickness additive that promises extended line life and improved casting performance. This additive is crucial for maintaining smooth casting even after extended use in various water conditions.
A key feature highlighted is the easy-to-see line ID printed directly on the line itself, a practical addition for anglers with multiple reels and lines. This eliminates the guesswork and helps ensure you're using the correct line for the job.
Amplitude Infinity WF7: Versatility and Performance
The Infinity WF7 features a bright green running line for high visibility in various water conditions. Its all-purpose taper makes it suitable for a wide range of species and fishing techniques, from fast-moving carp to panfish.

The line's design allows for longer casts, essential for covering more water and reaching distant fish. This versatility is a major selling point, making it a valuable addition to any angler's arsenal.
The reviewers emphasize the line's durability and longevity, suggesting it can withstand significant use without compromising performance. The added slickness helps maintain casting distance and smooth action.
Amplitude Trout WF5: Delicate Presentation for Technical Fishing
The Amplitude Trout WF5 is designed for more delicate presentations, ideal for species like grayling and panfish. Its lighter weight and refined taper make it well-suited for technical fishing situations.
Featuring a multifilament braid core, it remains sturdy and prevents limpness even in cold water. This ensures consistent casting performance and maintains line control.
This line excels in medium to long-range casts, making it perfect for dry fly fishing and nymph rigs. Its design combines strength and sensitivity, a rare balance for fly lines.
Conclusion: Which Amplitude Line is Right for You?
Both the Scientific Anglers Amplitude Infinity and Trout lines offer excellent performance and durability. The choice between the two depends on your fishing style and target species. The Infinity WF7's versatility makes it suitable for a wider range of situations, while the Trout WF5's delicate presentation is ideal for technical fishing.

Key features like the AST+ slickness additive, clear line ID, and color-coded running lines improve usability and enhance the overall fishing experience. The price point of $99.95 seems justified given the quality and performance.
Whether you're a seasoned angler or just starting out, the Scientific Anglers Amplitude series provides high-quality lines that will improve your casting and overall fishing experience. Their durability and features make them a worthy investment for any fly fisher.