What would be the downside of putting these strings on an old classical guitar I bought for $25. Would it cause the neck to bow?

Your guitar will be damaged on a classical with steel strings. Classical guitars necks are not built for steel they are built for nylon strings. Your neck will bow and warp

Are the first 3 strings nylon?

No, they are plain steel as in other acoustic sets. Nylon would only be found on classical sets.

What would be the best string size to use on a used acoustic guitar to be played by a 9 year old boy?

The lighter the guage...the easier to bend. The easier to bend...the harder to control. Since its an acoustic guitar, i would start with 10's ...try .10 to .46. Thats a pretty standard guage. He should be able to tell if he would like a smaller guage in which case go to 9's. Better yet....take him to a guitar shop and let him try some different guage strings. If hes just strumming, he may like the 10's. When hes ready for more sophisticated play, and until his hands get larger and stronger, he may need the 9's. Happy playing!

Can I put nylon strings on a guitar that use to have metal?

You can. You will need to do a neck adjustment to makeup for the lower tension. These strings are metal that the question was asked under.

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Earthwood Phosphor Bronzeシリーズ

Product ID: 741477913

Details

ストリング材質タイプ
リン青銅
ブランド
Ernie Ball
弦のゲージ
カスタム
楽器
アコースティックギター
色

🎸Medium Light Gauge .012-.054

🔊Warm, rich & transparent tone

🇺🇸Made in USA premium quality

Earthwood Phosphor Bronzeシリーズ

Product ID: 741477913

Details

ストリング材質タイプ
リン青銅
ブランド
Ernie Ball
弦のゲージ
カスタム
楽器
アコースティックギター
色

🎸Medium Light Gauge .012-.054

🔊Warm, rich & transparent tone

🇺🇸Made in USA premium quality

Bs.283

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Bolivia.

Secure transaction

Description

🎶 Elevate your acoustic vibe with strings that speak your style.

UNMATCHED TONAL CLARITY WARMTH - Phosphor bronze winding ensures a bright, clear sound with rich warmth that stands out in any acoustic setting.
CRAFTED WITH PREMIUM US MATERIALS - Manufactured in the USA using high-carbon steel cores wrapped in phosphor bronze for durability and consistent performance.
TOP RATED CHOICE AMONG ACOUSTIC PROS - Ranked #36 in guitar strings on Amazon with 4.6 stars from over 13,000 reviews—join the community of discerning players.
PERFECT BALANCE OF PLAYABILITY TONE - Medium Light gauge strings (.012-.054) deliver the ideal blend of ease and vibrant sound for every gig and jam session.
FRESHNESS GUARANTEED WITH SEALED PACKAGING - Each set is sealed to lock in freshness, so your strings sound brand new from day one—no compromises.

Ernie Ball Earthwood Phosphor Bronze Medium Light acoustic guitar strings (.012-.054) feature hexagonal high-carbon steel cores wrapped in a phosphor bronze alloy (92% copper, 7.7% tin, 0.5% phosphorus). Made in the USA and sealed for freshness, these strings deliver warm, rich, and transparent tones favored by professionals and enthusiasts alike. With a 4.6-star rating from over 13,000 reviews, they offer exceptional value and performance for acoustic guitarists seeking reliable, vibrant sound.

Specifications

ASIN	B0002DUQ04
Amazon 売れ筋ランキング	楽器・音響機器 - 928位 ( 楽器・音響機器の売れ筋ランキングを見る ) ギター弦 - 47位
GTIN (Global Trade Identification Number)	00749699121466
UPC	749699121466
おすすめ度	4.6 5つ星のうち4.6 (13,531) var
カラー	ミディアム・ライト(12-54)
ゲージ	カスタム
ブランド名	Ernie Ball
メーカー名	ERNIE BALL
メーカー型番	P02146
仕上げタイプ	コーティングなし
保証内容	メーカーの保証規定に準ずる
原産国	アメリカ合衆国
商品の重量	0.01 ポンド
商品種別	アコースティックギター弦
型番	P02146
弦の材質	リン青銅
楽器	アコースティックギター
表面処理	コーティングなし

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Bs.283

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Bolivia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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