Head Sonic Pro
Unique co-polymer polyester with soft molecular construction
Junior Player Guide
For ParentsRecommended Level
Tension for Juniors
50-54 lbs for juniors. Best in mid-50s.
Gauge Recommendation
17 (1.25mm) for feel.
Overview
Head Sonic Pro combines unique co-polymer polyester with a soft molecular construction for good touch and comfortable feel. "A great all-round string that delivers on its promise of control and comfort." Received remarkably low stiffness scores compared to most polys tested. Power level slightly higher than average for a co-poly. After an hour of hitting it softens up and feels livelier. Best in the mid-50s tension range - at higher tensions it plays too dead, lower tensions lose control. Budget-friendly at $8-12 per set.
Best For
- ✓ Budget-conscious players wanting poly
- ✓ Club players in regular competition
- ✓ Those wanting all-round playability
- ✓ Juniors trying polyester for first time
Not Ideal For
- ✗ Maximum spin seekers (try Sonic Pro Edge)
- ✗ String breakers
- ✗ Those needing long tension maintenance
Pros
- + Great value - budget-friendly
- + Good all-round playability
- + Comfortable for a poly
- + Crisp feel after break-in
- + Good control
- + Accessible to average players
Cons
- − Tension loss after 5-7 hours
- − Limited spin (round profile)
- − Not for string breakers
- − Can feel dead at high tensions
Specifications
Used By
Hybrid Setup Ideas
- Works as full bed
- Multifilament crosses for more power
Stringer Notes
Budget poly option. Softens after 1 hour of play. Best at 50-54 lbs. Good for juniors trying poly.
Break-in Period
1 hour. Softens and livens up after initial hitting.
When to Replace
Every 7-10 hours due to tension loss.
Similar Strings
Sources
Data verified January 2025
- Specs: Tennis Warehouse
- Pricing: Tennis Warehouse
- Review: Tennis Warehouse Review
- Review: The Tennis Bros Review
- Review: Tennis Creative Review
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