Scientific Anglers Amplitude Textured MPX
In Stock • Bozeman, MT
- Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
- Floating Texture on the tip section for the ultimate in flotation
- Improved version of our GPX taper
- Made a half-size heavy to load fast-action rods
- Best for large dry flies, nymphs, and streamers
- For use in moderate and cold climates
Description
Built half a size heavy, the Amplitude Textured MPX taper starts where SA's earlier GPX left off, redesigned with more mass toward the front of the head to add a bit of finesse to the same proven power.
That forward-loaded head delivers strong turnover for nymphs, indicator rigs, and streamers while still handling large dry flies with a lighter touch than a straight power taper. Floating Texture on the tip section boosts flotation, Shooting Texture on the running line delivers measurably longer casts, and a Tactical Reference Point sighter helps track how much line is out. SA's AST Plus additive, built into the coating itself, cuts friction for up to 40% less drag and 60%+ longer-lasting performance across a hard season.
Features
• Half-Size Heavy, Front-Loaded Head — Concentrates mass in the first 20' for strong turnover with nymphs and streamers.
• Shooting Texture — Textured running line delivers measurably longer casts.
• Tactical Reference Point — Visual sighter marking where the head meets the running line.
• AST Plus Slickness Additive — Up to 40% slicker and 60%+ longer-lasting than lines with no additive.
• SA Line ID — Printed weight and taper marking directly on the line.
• Braided Multifilament Core — Supple handling with reduced coiling memory.
• Welded Loops, Front and Rear — Fast, secure connections to backing and leader.
Rod Pairing
| Rod Action | Pairing | Notes |
|---|---|---|
| Fast Action | Ideal | The half-size-heavy, front-loaded head is built to load fast blanks with ease. |
| Medium-Fast Action | Works Well | Handles the taper fine. |
| Medium / Slow Action | Not Recommended | The forward-weighted head overloads a soft blank fast, especially up close. |
Size Guide
| Line Weight | Head Length | Head Weight | Grain Wt (30') | Species / Technique |
|---|---|---|---|---|
| WF3 | 32.0' / 9.6M | 120gr / 7.8g | 110gr / 7.1g | Small stream trout, light nymphs and dries, panfish |
| WF4 | 34.0' / 10.2M | 140gr / 9.1g | 130gr / 8.5g | Trout, panfish, grayling, general dries and nymphs |
| WF5 | 36.0' / 10.8M | 175gr / 11.3g | 150gr / 9.7g | All-around trout, indicator nymphing, dry-dropper |
| WF6 | 38.0' / 11.4M | 210gr / 13.6g | 175gr / 11.3g | All-around trout on bigger water, indicator rigs, dry-dropper, streamers |
| WF7 | 40.0' / 12.0M | 260gr / 16.8g | 200gr / 13.0g | Bass, carp, big streamers, light steelhead and salmon |
| WF8 | 42.0' / 12.6M | 305gr / 19.8g | 225gr / 14.6g | Bass, pike, carp, big streamers, light steelhead and salmon |
FAQ
What are the parts of a fly line and what does each section do?
A weight-forward fly line has five sections: Running Line: The thin, level back section that shoots through guides. Shooting Texture on this section reduces surface contact with the guides for longer casts. Rear Taper: The transition from running line to belly. Belly (Head): The thickest section, growing from 32 feet on the WF3 to 42 feet on the WF8, with most of its mass concentrated in the front 20 feet -- a design that starts where SA's earlier GPX taper left off, redesigned with more mass forward for an added emphasis on presentation. Front Taper: The transition from belly to tip, delivering the power that turns over nymphs, streamers, and larger dry flies. Tip: The final section, finished with Floating Texture for extra flotation and a welded loop for a fast, secure leader connection.
How does the Amplitude Textured MPX compare to the Amplitude Smooth MPX?
SA builds the MPX taper in two finishes on the identical head length, taper design, and grain weight at every size -- the difference is entirely in surface finish, technology, and price. Amplitude Textured MPX (reviewed here): Adds Floating Texture on the tip for extra flotation, Shooting Texture on the running line for longer casts, and a Tactical Reference Point sighter, plus extra grip when striking and playing fish. Amplitude Smooth MPX: The identical taper in SA's classic smooth, texture-free finish -- quieter through the guides and $30 less. Choose the Textured MPX reviewed here if the added flotation, shooting distance, and grip are worth the $30 premium. Choose the Smooth MPX for the same proven taper at a lower price and a more traditional feel.
What is AST Plus and how does it affect performance?
AST Plus is Scientific Anglers' upgraded slickness additive, built into the coating rather than applied to the surface. SA rates it up to 40% slicker and over 60% longer-lasting than a line with no additive, delivering up to five times less drag and eight times the durability of traditional lines. Because the compound can migrate within the coating, AST Plus works its way back to the surface as the line wears, so the reduced friction holds up over a full season rather than fading after the first few trips.
What are Floating Texture and Shooting Texture, and how do they improve casting?
Floating Texture is a raised surface pattern applied to the tip section, increasing surface area and buoyancy so the tip rides higher and stays afloat longer than a smooth finish -- useful on a taper that regularly throws weighted nymphs and indicator rigs that would otherwise drag the tip under. Shooting Texture, applied to the running line, reduces the line's contact area with the rod guides, cutting friction and letting the line carry more momentum through the cast -- reviewers of this exact taper report noticeably longer shots as a result.
What is the Tactical Reference Point and why does it help?
The Tactical Reference Point is a visual marking on the line that gives a quick, at-a-glance reference for where the head meets the running line. On a taper like this one, built for switching quickly between dry flies, nymph rigs, and streamers, that reference point helps gauge how much line is out and where the taper's power is concentrated -- useful for judging cast length and knowing when the line is loaded correctly for the rig currently in play.
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