Detail 01
Extra hard tension
More resistance under the fingers, louder attack, less buzz on hard strokes. Also more pull on the neck and top.
Product detailSKU #1274034478252
D'AddarioEJ44 Pro-Arte SP Extra Hard Classical Guitar Strings Set
1/5
Independent shopping perspective
The Korena take
Extra hard tension nylon strings for classical guitar. For players who dig in hard or want more resistance under the right hand.
Strong match
Who this is for
- Players whose normal-tension strings buzz under a heavy right hand
- Classical or flamenco players wanting firmer attack and projection
- Anyone chasing more volume without changing guitars
Consider the trade-offs
When to look elsewhere
- Steel-string acoustic or electric guitars — nylon only
- Beginners building finger strength; lighter tension is easier to fret
- Older or lightly built classicals not rated for high tension
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Pro-Arte nylon trebles
Warmer, rounder top end than steel. Slower response, but easier on bare fingertips.
Detail 03
Classical set
Tie-block ends, no ball ends. Requires a classical bridge and slotted nylon-string nut.
Detail 04
SP (silver-plated) basses
Wound bass strings with a silver-plated wrap over nylon filament core, for a fuller low end.
Final check
Know before you order
- 01Nylon needs several days of stretching before it holds pitch
- 02Confirm your guitar is built for nylon — steel-string bridges will not tie off
- 03One set, six strings. No tools or winder included
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Can I put these on my acoustic guitar?
Only if it is a nylon-string classical. Steel-string acoustics have a pin bridge and a narrower nut slot; nylon will not tie off or seat correctly.
02What is the difference between hard and extra hard tension?
Extra hard sits a step above hard: stiffer feel, more volume and attack, less buzzing when you play hard. It is also more work to press down.
03How long do they take to settle in?
Nylon stretches a lot. Expect to retune repeatedly over the first few days before the pitch holds.
04Will extra hard tension damage my guitar?
It puts more pull on the top and neck than normal tension. On an older or lightly built classical, check with a tech first.
