Ernie Ball Earthwood P03448 Light Phosphor Bronze 3 Pack
- Light gauge, 11-52 (gauge entry reads custom light)
- Phosphor bronze wrap: 92% copper, 7.7% tin, 0.5% phosphorus
- Brass-plated hex steel core
- Warm, rich sound with clear trebles
- Individually wrapped sets
- No warranty, per the listing
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A multi-set pack of phosphor bronze acoustic strings with a warm, rich voice and clear trebles. The title says light but the gauge entry says custom light, so check the set.
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ASIN: B01K7J1ECGCategory: Acoustic Guitar Strings
Overview
Brass-plated hex-shaped steel cores carry phosphor bronze wrap wire in this Ernie Ball Earthwood pack. The wrap blends copper, tin and phosphorus, and each set is individually wrapped.
The description ties phosphor bronze to a rich tone with excellent clarity, and the spec line adds warmth with clear trebles. Separate wrapping helps when sets are stored apart. The listing offers a full gauge list but states no warranty, and the gauge name is entered two ways.
Who it's for
Guitarists who like a warm voice with clean trebles and restring often. Anyone who needs coated wire or warranty cover should look at a different set.
Pros and cons
- Phosphor bronze wrap alloy stated
- Brass-plated hex core
- Full gauge list given
- Sets wrapped individually
- No warranty offered
- Gauge named two ways
- Coating status not stated
Performance notes
The copper, tin and phosphorus wrap gives the rich tone the description names, while the hex core holds the winding in place. Gauge sets tension and finger effort across the six strings. Individual wrapping protects each set until opened.
Specifications
| Brand | Ernie Ball |
|---|---|
| Dimensions & fit | |
| Item weight | 1.6 ounces |
| Construction & materials | |
| String Material Type | Phosphor bronze: 92% copper, 7.7% tin, 0.5% phosphorus |
| Included components | |
| Number of Packs | 3, individually wrapped |
| Warranty & support | |
| Warranty Description | None |
| Other details | |
| String Gauge | Light, 11-52 (gauge entry reads custom light) |
| Gauges | .011, .015, .022 (wound), .030, .042, .052 |
| Sound Profile | Warm and rich with clear trebles |
| Core | Brass-plated hex-shaped steel |
Frequently asked questions
How many sets come in the Ernie Ball P03448 pack?
Three. The included components entry lists three individually wrapped sets of strings.
Is the P03448 light or custom light?
The title and model name say light, 11-52, while the gauge entry says custom light. The description lists gauges of .011 to .052.
Are these Earthwood phosphor bronze strings for electric guitar?
No. The listing names acoustic guitar as the instrument.