---
product_id: 627554578
title: "3.5mm Aux + RCA L/R Audio Splitter 1 in 4 Out Stereo Analog Audio Distributor Box"
brand: "flyroadup"
price: "¥7586"
currency: JPY
in_stock: true
reviews_count: 13
category: "Flyroad Up"
url: https://www.desertcart.jp/products/627554578-3-5mm-aux-rca-l-r-audio-splitter-1-in
store_origin: JP
region: Japan
---

# 1 in 4 stereo output 3.5mm + RCA combo ports durable metal enclosure 3.5mm Aux + RCA L/R Audio Splitter 1 in 4 Out Stereo Analog Audio Distributor Box

**Brand:** flyroadup
**Price:** ¥7586
**Availability:** ✅ In Stock

## Summary

> 🎧 Amplify your audio connections, not your clutter!

## Quick Answers

- **What is this?** 3.5mm Aux + RCA L/R Audio Splitter 1 in 4 Out Stereo Analog Audio Distributor Box by flyroadup
- **How much does it cost?** ¥7586 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/627554578-3-5mm-aux-rca-l-r-audio-splitter-1-in)

## Best For

- flyroadup enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Rugged metal casing designed for long-term, reliable use in any setup
- • **Plug & Play Simplicity:** No complicated setup—just connect and elevate your audio experience instantly
- • **Quad-Output Powerhouse:** Simultaneously connect 4 devices with zero sound quality loss
- • **Universal Compatibility:** Seamlessly supports 3.5mm aux and RCA L/R inputs & outputs for ultimate flexibility
- • **Expand Your Audio Universe:** Perfect for home theaters, studios, parties, and multi-device listening sessions

## Overview

The FlyroadUp 3.5mm Aux + RCA L/R Audio Splitter is a compact, metal-encased analog audio distributor that splits one stereo input into four outputs without degrading sound quality. Supporting both 3.5mm and RCA connections, it’s ideal for expanding your audio setup across headphones, speakers, and amplifiers. Designed for easy plug-and-play use, it ensures crisp, clear stereo sound for professional and home environments alike.

## Description

Buy FlyroadUp 3.5mm Aux + RCA L/R Audio Splitter 1 in 4 Out Stereo Analog Audio Distributor Box: Selector Switch Boxes - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good splitter - Very good splitter. Works fine.
Review: Very good Frequency Response (4 Port Audio Splitter AUX-104) - Calling this an audio splitter only partly describes what this is. It is really a distribution amplifier with independent amplifiers for each port. The gain is 1 which is intended (what you put in is what you get out). It does not have any volume or tone controls which is actually good for the intended use. If you simply put "Y" cable splitters in an audio output to supply signals to two or more devices, your signal level drops for each extra load you add. This buffer/distribution amplifier solves that problem. I measured the frequency response for each of the four amplifiers. They are virtually identical. The -3dB points are about 15Hz to something greater than 26kHz. The -1dB points are about 30Hz to something greater than 26kHz. At the high end some of the 0.5dB drop-off shown in the plot was due to my test setup. So, it is actually better than shown. There was about a 0.5dB insertion loss which is no problem. Very minor issues are that the front panel red LED is overly bright, and I wish the manufacture used the same slightly larger case as they used on their 8 Port to 1 audio switch. That would have allowed stacking more attractive. Perhaps some mounting brackets (and threaded holes on the sides) to allow stacking would be nice. I have three of the 8 to 1 port switches plus this Audio Switch box stacked. A simple power ON/OFF switch would have been nice.

## Features

- 【1 in 4 out Splitter】FlyroadUp 4-way audio splitter allows you to connect one stereo audio source, output to four devices simultaneously without loss in sound quality *Please note: it cannot work as amplifier; connect all devices while they are powered off and power them on only after secure connections are established can effectively avoid noise issue
- 【Versatility and Flexibility】With combination of 3.5mm auxiliary and RCA L/R, it supports 3.5mm aux input, 3.5mm & RCA L/R output; or RCA L/R input, 3.5mm & RCA L/R output
- 【Expand Audio Setup】This audio splitter allows you to connect multiple devices such as headphones, speakers, subwoofers, amplifiers... to a single audio source
- 【Premium Quality】Sturdy metal enclosure ensures long-lasting performance, compact design makes it ideal for home entertainment systems, music studios, parties, and more
- 【Easy to Use】Just plug and play, you can elevate your audio experience, enjoy crisp clear stereo sound and immerse yourself in a world of audio fidelity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CYH8DHMJ |
| Best Sellers Rank | #118 in Audio & Video Selector Boxes |
| Customer Reviews | 3.8 3.8 out of 5 stars (113) |
| Date First Available | March 19, 2024 |
| Item Weight | 11.2 ounces |
| Item model number | A-104 |
| Manufacturer | FlyroadUp |
| Product Dimensions | 5.8 x 2.8 x 1.5 inches |

## Product Details

- **Brand:** FlyroadUp
- **Cable Type:** RCA L/R, 3.5mm AUX
- **Color:** Black
- **Compatible Devices:** Active Speaker, Amplifier, Headphone, Subwoofer
- **Connector Type:** 3.5mm Jack, RCA

## Images

![3.5mm Aux + RCA L/R Audio Splitter 1 in 4 Out Stereo Analog Audio Distributor Box - Image 1](https://m.media-amazon.com/images/I/61OOrW6GUoL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good splitter
*by P***2 on November 14, 2025*

Very good splitter. Works fine.

### ⭐⭐⭐⭐⭐ Very good Frequency Response (4 Port Audio Splitter AUX-104)
*by A***R on May 30, 2025*

Calling this an audio splitter only partly describes what this is. It is really a distribution amplifier with independent amplifiers for each port. The gain is 1 which is intended (what you put in is what you get out). It does not have any volume or tone controls which is actually good for the intended use. If you simply put "Y" cable splitters in an audio output to supply signals to two or more devices, your signal level drops for each extra load you add. This buffer/distribution amplifier solves that problem. I measured the frequency response for each of the four amplifiers. They are virtually identical. The -3dB points are about 15Hz to something greater than 26kHz. The -1dB points are about 30Hz to something greater than 26kHz. At the high end some of the 0.5dB drop-off shown in the plot was due to my test setup. So, it is actually better than shown. There was about a 0.5dB insertion loss which is no problem. Very minor issues are that the front panel red LED is overly bright, and I wish the manufacture used the same slightly larger case as they used on their 8 Port to 1 audio switch. That would have allowed stacking more attractive. Perhaps some mounting brackets (and threaded holes on the sides) to allow stacking would be nice. I have three of the 8 to 1 port switches plus this Audio Switch box stacked. A simple power ON/OFF switch would have been nice.

### ⭐ defective or junk!
*by S***N on August 23, 2025*

Causes a loud "popping" noise in speakers when power is turned off or on via amp or unit its'self. Also causes a low level hum around 30hz to be present in the subwoofer. A real sound killer. I'm going to return the unit, and just stick with the cheap but proven and tried old school rca splitter.

## Frequently Bought Together

- FlyroadUp 3.5mm Aux + RCA L/R Audio Splitter 1 in 4 Out Stereo Analog Audio Distributor Box
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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-15*