---
product_id: 72096674
title: "SP400 SquarePlug. World's smallest Angled 1/4\" Mono Jack Pancake Plug Connector"
brand: "kmmk"
price: "FREE"
currency: GBP
in_stock: false
reviews_count: 2
url: https://www.desertcart.co.uk/products/72096674-sp400-squareplug-worlds-smallest-angled-1-4-mono-jack-pancake
store_origin: GB
region: United Kingdom
---

# 20% smaller than Switchcraft 228 Ultra low profile: 8.3mm projection 2 solder tabs for quick soldering SP400 SquarePlug. World's smallest Angled 1/4" Mono Jack Pancake Plug Connector

**Brand:** kmmk
**Price:** FREE
**Availability:** ❌ Out of Stock

## Summary

> 🎸 Maximize your pedalboard space with the tiniest titan of connectors!

## Quick Answers

- **What is this?** SP400 SquarePlug. World's smallest Angled 1/4" Mono Jack Pancake Plug Connector by kmmk
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/72096674-sp400-squareplug-worlds-smallest-angled-1-4-mono-jack-pancake)

## Best For

- kmmk enthusiasts

## Why This Product

- Trusted kmmk brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Fit:** Engineered for cables 4-4.5mm diameter, ensuring snug, secure connections
- • **Durable Elegance:** All-metal matte nickel finish combines ruggedness with sleek professional style
- • **Compact Powerhouse:** World’s smallest 1/4" angled mono jack, saving precious pedalboard real estate
- • **Effortless Installation:** Dual solder tabs enable fast, reliable soldering and desoldering
- • **Ultra Low Profile Design:** Projects only 8.3mm for seamless fit in crowded setups

## Overview

The SP400 SquarePlug is the world’s smallest angled 1/4" mono jack soldered connector, boasting a 20% smaller footprint than the Switchcraft 228 and an ultra-low 8.3mm projection. Designed for tight, adjacent socket configurations, it features dual solder tabs for quick installation and a durable all-metal matte nickel finish, making it the ultimate space-saving solution for professional musicians and audio engineers.

## Description

SquarePlug SP400/500, designed and manufactured by kmmk solutions, is the smallest 1/4" soldered connector on the market. It is 20% smaller than the Switchcraft 228 and projects by only 8.3mm which is much less than any currently available soldered and solder-less connectors. What makes SP400 stands out though, is its ability [thanks to a super compact design] to be patched into adjacent and closely spaced socket configurations [like the ones found on floor and rack based switching systems] where no other right angled soldered plug can. With SquarePlug you get the performance and reliability of a soldered connector with virtually the same footprint of a solderless one!

Review: These neat thin profile plugs save so much valuable space on a pedalboard! - Effects pedals with side jacks can be placed so much closer to one another using these plugs which is really handy when trying to cram as many pedals onto your pedal-board as you can. I just wish I had come across the sooner! They also look quite cool too.
Review: Super slim for busy pedal boards - Easy to solder - super flat / slim construction so you can cram more stomps on your board - top stuff gonna buy me some more :)

## Features

- This is the smallest 1/4" soldered connector on the market. It is 20% smaller than the Switchcraft 228 and projects by only 8.3mm
- Ultra low profile connector [measures only 8.3mm / 0.326" x 17mm / 0.67" x 28mm / 1.10"] for highest packing density
- 2 solder tabs for quick and easy soldering/desoldering
- Designed to snug fit cables between 4 and 4.5mm in dia. (SP400)
- All metal construction (matte nickel plating finish)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0798PLK5W |
| Best Sellers Rank | 52,652 in Musical Instruments & DJ ( See Top 100 in Musical Instruments & DJ ) 974 in Instrument Cables |
| Brand | KMMK |
| Cable Type | AUX |
| Colour | Nickel |
| Compatible Devices | Headphone, Music Player, Smartphone, Speaker, Tablet, computers |
| Compatible Phone Models | Compatible with smartphones, specific models not listed |
| Connector Gender | Male-to-Female |
| Connector Type | solder |
| Customer Package Type | sealed anti-static bag |
| Customer Reviews | 4.2 4.2 out of 5 stars (5) |
| Indoor Outdoor Usage | Indoor |
| Item Length | 28 Millimetres |
| Item Shape | Round |
| Item Weight | 30 Grams |
| Manufacturer | KMMK |
| Maximum Voltage | 5 Volts |
| Model Name | SP400 |
| Model Number | SP400 |
| Number of Items | 1 |
| Number of Pins | 3 |
| Other Special Features of the Product | Super Compact Design, Patented Connector |
| Outer Material | Metal |
| Recommended Uses For Product | The SquarePlug SP400 is recommended for use in high-density setups, such as floor and rack-based switching systems, where space is limited. It is designed to connect cables between 4 and 4.5mm in diameter securely and reliably. |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** KMMK
- **Cable type:** AUX
- **Compatible devices:** Headphone, Music Player, Smartphone, Speaker, Tablet, computers
- **Connector type:** solder
- **Special feature:** Super Compact Design, Patented Connector

## Images

![SP400 SquarePlug. World's smallest Angled 1/4" Mono Jack Pancake Plug Connector - Image 1](https://m.media-amazon.com/images/I/719G6IFQ0IL.jpg)
![SP400 SquarePlug. World's smallest Angled 1/4" Mono Jack Pancake Plug Connector - Image 2](https://m.media-amazon.com/images/I/610E4paQuSL.jpg)

## Questions & Answers

**Q: Is this the price for one, a pair, or a pack?**
A: It is the price for one connector

## Customer Reviews

### ⭐⭐⭐⭐⭐ These neat thin profile plugs save so much valuable space on a pedalboard!
*by I***. on 18 February 2020*

Effects pedals with side jacks can be placed so much closer to one another using these plugs which is really handy when trying to cram as many pedals onto your pedal-board as you can. I just wish I had come across the sooner! They also look quite cool too.

### ⭐⭐⭐⭐⭐ Super slim for busy pedal boards
*by 0***2 on 12 November 2018*

Easy to solder - super flat / slim construction so you can cram more stomps on your board - top stuff gonna buy me some more :)

## Frequently Bought Together

- SP400 SquarePlug. World's smallest Angled 1/4" Mono Jack Pancake Plug Connector
- Ernie Ball Not Even Slinky Nickel Wound Electric Guitar Strings - 12-56 Gauge
- D'Addario Guitar Strings - XL Nickel Electric Guitar Strings - EXL120-7 - Perfect Intonation, Consistent Feel, Reliable Durability - For 7 String Guitars - 09-54 Super Light 7-String

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**Shop now:** [https://www.desertcart.co.uk/products/72096674-sp400-squareplug-worlds-smallest-angled-1-4-mono-jack-pancake](https://www.desertcart.co.uk/products/72096674-sp400-squareplug-worlds-smallest-angled-1-4-mono-jack-pancake)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-19*