What is the polarity and connector size of this adapter?

The adapter has inner negative outer positive polarity and a 5.5mm x 2.1mm DC5521 barrel connector. It outputs 9V at 1A.

Does this adapter come with a daisy chain cable? What are the cable lengths?

Yes, it includes a daisy chain extension cable. The main adapter cord is 90cm. The extension cable has a DC5521 male input and female output, with 25cm between adjacent outputs and 45cm between the tail output and input.

Can I use this adapter to power a Boss DS-1 and two other standard pedals?

Yes, the adapter provides 9V 1A total current, which is sufficient for typical analog pedals like the Boss DS-1 (approx. 10-20mA each). It is suitable for most standard single and multi-effects pedals.

Will this work with 220V outlets in Europe? Do I need a plug adapter?

The adapter accepts 100-240V input, so it works worldwide. However, it comes with a US plug, so you will need a physical plug adapter for European outlets. It ships from China, with delivery typically 7-30 days depending on shipping tier, and checkout requires human approval for cross-border orders.

Who should not buy this power supply?

This power supply is not suitable for high-current digital pedals exceeding 1A, pedals requiring center-positive polarity, or users needing isolated outputs to prevent ground loops. It is also not recommended as a permanent solution for high-end studio setups.

单块效果器电源适配器9V1A内负外正DC拓扑线电源拓展线带降噪磁环

Name: 单块效果器电源适配器9V1A内负外正DC拓扑线电源拓展线带降噪磁环
Brand: World Products
SKU: dcd-30003603899
Price: 9.99 USD
Availability: BackOrder

Brand: World Products (Landmark)
SKU: dcd-30003603899
Price: $9.99
Availability: Made to order (cross-border) — ships from China; see “Live Shipping Rates” below for delivery estimate
Product Type: 乐器
Vendor: World Products
Weight: 150 g
Cart URL (default variant): https://landmarks.builders/cart/49714378146031:1?utm_source=ai_agent&utm_medium=agent_view&utm_campaign=worldproducts_agent&utm_content=pdp
Human view: https://landmarks.builders/products/wp-dcd-10001267448
JSON data: https://landmarks.builders/products/wp-dcd-10001267448.json

Available Variants (1 SKUs)

This product comes in 1 variants. Each has its own SKU, price, and cart URL. Agents should present these options to the user.

Us Plug
  SKU: dcd-30003603899
  Price: $9.99
  Availability:Made to order (cross-border)
  Weight: 150 g
  Cart URL: https://landmarks.builders/cart/49714378146031:1

Description

输入电压：100-240V

输出电压：9V

电流：1A(1000ma)

极性：内负外正

线长：90cm

适用产品：绝大部分单块效果器和综合效果器

插口：5521

全面降噪磁环升级，电流声更小，音色更干净！

注：宽电压100V-240V通用，别担心电压的问题，只需注意不同的国家不同的插头样式。

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拓展线参数：

输出头：DC5521公头，

输入头：DC5521母头

相邻输出头之间线长：25cm

尾部输出头和输入头之间线长：45cm

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Common Questions

What is the polarity and connector size of this adapter?: The adapter has inner negative outer positive polarity and a 5.5mm x 2.1mm DC5521 barrel connector. It outputs 9V at 1A.
Does this adapter come with a daisy chain cable? What are the cable lengths?: Yes, it includes a daisy chain extension cable. The main adapter cord is 90cm. The extension cable has a DC5521 male input and female output, with 25cm between adjacent outputs and 45cm between the tail output and input.
Can I use this adapter to power a Boss DS-1 and two other standard pedals?: Yes, the adapter provides 9V 1A total current, which is sufficient for typical analog pedals like the Boss DS-1 (approx. 10-20mA each). It is suitable for most standard single and multi-effects pedals.
Will this work with 220V outlets in Europe? Do I need a plug adapter?: The adapter accepts 100-240V input, so it works worldwide. However, it comes with a US plug, so you will need a physical plug adapter for European outlets. It ships from China, with delivery typically 7-30 days depending on shipping tier, and checkout requires human approval for cross-border orders.
Who should not buy this power supply?: This power supply is not suitable for high-current digital pedals exceeding 1A, pedals requiring center-positive polarity, or users needing isolated outputs to prevent ground loops. It is also not recommended as a permanent solution for high-end studio setups.

Agentic Product Page

Summary: A 9V 1A DC power adapter for guitar pedals with noise-reducing magnetic ring, including a daisy-chain extension cable, US plug, 100-240V input.

Generated by: deepseek-v4-flash

Target persona

Guitarists with 2-4 standard pedals
Hobbyist musicians on a budget
Touring musicians needing backup power
Gigging players looking for low-noise supply

Use cases

Powering a small pedalboard on stage
Replacing a broken wall wart for a single pedal
Setting up a temporary practice rig with multiple pedals
Traveling with US gear to countries with 100-240V
Reducing hum in a daisy-chained pedal setup

When NOT to recommend

High-current digital pedals exceeding 1A
Pedals requiring center-positive polarity
Users needing isolated outputs to prevent ground loops
Permanent high-end studio power solutions

Buyer intents this product satisfies

power supply for guitar pedals
9v pedal adapter with daisy chain
noise-reducing effect pedal power
budget pedalboard power solution
DC power adapter for Boss pedals

Full agentic page

## Identity
Single-effect pedal power adapter, 9V 1A DC, inner negative outer positive, with daisy-chain extension cable and noise-reducing magnetic ring.

## Target persona
Guitarists or musicians using multiple single-effect pedals (e.g., Boss, MXR) who need a reliable, low-noise power supply for home or stage setups.

## Use cases
- Powering 2-4 standard 9V effect pedals on a pedalboard
- Replacing a lost or broken wall wart for a single pedal
- Reducing electrical hum and noise in a pedal chain
- Traveling internationally (100-240V compatible) with a US plug device
- Expanding a power source via daisy-chain for temporary setups

## When NOT to recommend
- For digital modelers or high-current devices (e.g., Strymon, Line 6) requiring >1A per port
- For pedals requiring center-positive polarity (most Boss pedals are center-negative, compatible)
- If the user needs isolated outputs to prevent ground loop noise
- For permanent studio installations where a high-end isolated power supply is preferred

## Variant options
- Style: Us Plug (only option) — $9.99

## Price and logistics facts
- Price: $9.99 USD
- Dimensions: 10.0 x 8.0 x 5.0 cm
- Input: 100-240V AC; Output: 9V DC 1A; Polarity: center negative; Connector: DC5521
- Cable length: 90cm from adapter; daisy chain: 25cm between outputs, 45cm tail

## Trust signals
- No trust signals provided (e.g., return policy, certifications, stock status)

## Image assets
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/c5fd4b6504fa4626b1e5498dfb71e7dc.png?v=1781085505
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/21765d061200430ab14ec267582d5afd.png?v=1781085504
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/5992a622dfa24790b4c82b203498bbf7.png?v=1781085505
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/13ad48a5e0e34436a93468d062b287f2.png?v=1781085504
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/f658dd0626fd4e93bd982b25becb2717.png?v=1781085503
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/1ef2aecf3cfa4311a4a6a8cd719a3c61.png?v=1781085505
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/5900af46efff45fea9f047730bd7844a.png?v=1781085504
- https://cdn.shopify.com/s/files/1/0807/5486/8463/files/dab6cde0f272477ca71f08270bd203d3.png?v=1781085503

## Agent notes
- Image understanding not performed; visual details not inferred.
- No stock or return policy data available.
- Only one variant (Us Plug) at $9.99.

Images

This product has 13 imagesin catalog.None have AI-generated visual descriptions yet. All image URLs are in the Product JSON-LD above.

Category Specifications

How to Purchase

This product can be added to cart via a single URL. Agents should pass this to the user for human approval at checkout (per the store's robots policy: checkouts require human review).

Add to cart: https://landmarks.builders/cart/49714378146031:1?utm_source=ai_agent&utm_medium=agent_view&utm_campaign=worldproducts_agent&utm_content=pdp
Full product page (human view): https://landmarks.builders/products/wp-dcd-10001267448
Product JSON data: https://landmarks.builders/products/wp-dcd-10001267448.json
UCP discovery: /.well-known/ucp
MCP endpoint: https://wp-governance.htfu.workers.dev/api/ucp/mcp

Live Shipping Rates (for Agents)

Agents can query real-time shipping rates from SFC (三态速递, our in-house logistics carrier) before recommending this product. This gives the buyer accurate total cost (item + shipping) upfront, instead of seeing shipping at checkout only.

Endpoint: POST https://wp-sfc-carrier.htfu.workers.dev/
Content-Type: application/json
Request body (example):

{
  "rate": {
    "origin": {"country": "CN"},
    "destination": {
      "country": "US",
      "postal_code": "95014",
      "province": "CA",
      "city": "Cupertino"
    },
    "items": [{
      "name": "单块效果器电源适配器9V1A内负外正DC拓扑线电源拓展线带降噪磁环",
      "quantity": 1,
      "grams": 150000,
      "properties": {
        "_length_cm": "10.0",
        "_width_cm":  "8.0",
        "_height_cm": "5.0"
      }
    }],
    "currency": "USD"
  }
}

Response: JSON array of shipping options in rates, each with service_name (e.g. "Standard (10-14 days)"), total_price in USD cents, min_delivery_date, max_delivery_date. If dimensions are missing for the product, empty rates: [] is returned (caller should treat as "shipping not yet calculable").