---
product_id: 144750719
title: "Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker"
brand: "douk audio"
price: "R$38"
currency: BRL
in_stock: false
reviews_count: 13
url: https://www.desertcart.com.br/products/144750719-little-bear-mc104-pro-mini-audio-switcher-4-way-3
store_origin: BR
region: Brazil
---

# Passive, no power needed for pure audio Ultra-compact, travel-friendly design 4-in-1-out/1-in-4-out seamless switching Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker

**Brand:** douk audio
**Price:** R$38
**Availability:** ❌ Out of Stock

## Summary

> 🎧 Elevate your audio game—switch smarter, sound better.

## Quick Answers

- **What is this?** Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker by douk audio
- **How much does it cost?** R$38 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/144750719-little-bear-mc104-pro-mini-audio-switcher-4-way-3)

## Best For

- douk audio enthusiasts

## Why This Product

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

## Key Features

- • **Pocket-Sized Powerhouse:** Fits perfectly on any desk or in your travel bag for audio on the move.
- • **Pure Audio, Zero Interference:** Passive design means no power, no noise, just crystal-clear sound.
- • **Built to Perform, Built to Last:** Custom potentiometers and isolation modules minimize noise and maximize reliability.
- • **Effortless Multi-Source Switching:** Switch between gaming, calls, music, and more with zero hassle.
- • **Intuitive Control at Your Fingertips:** Four independent switches plus one-button mute for instant audio management.

## Overview

The Little Bear MC104 PRO is a compact, passive 4-in-1-out/1-in-4-out 3.5mm AUX audio switcher designed for professionals and audiophiles who demand seamless multi-source connectivity without compromising sound quality. Its ultra-portable design fits any setup or travel bag, while custom components ensure minimal noise and reliable performance—all without needing external power.

## Description

desertcart.com: Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker : Electronics

Review: Worth the money - I use this to switch sound between two computers to a set of desktop speakers. Works great and no sound lost or any kind of distortion. There are a total of four in ports so I could add more if I needed to. One cool design of this little control is you have all inputs in the back and one output in the back and one output in the front so all my wirers are out of the way falling behind the desk. It looks really nice sitting on the desktop secure with it's no slide rubber feet. Good product.
Review: Interesting design and works well. Beware one design feature! - The device has no case and is constructed as a stack of circuit boards separated by standoffs, spacers and screws. The components are exposed, which is part of the appeal of the unit for my use and taste. The button assembly allows only a single button to be depressed at one time, connecting the common jack to one of four output/input jacks. If you plug a device into the single front-facing jack, it becomes the common jack, bypassing whatever is connected to the common jack at the rear. This very convenient, as it allows hiding cords at the rear, while allowing a headset or other device to be plugged in without moving the unit. The red button disconnects both the front and rear common jacks from the selected output jack. It can act as a mute switch and is very handy. My application was to switch DC low voltage levels (a Morse code ham radio “paddle” using a 3.5mm stereo plug) through the box to one of four ham radio transceivers. I discovered a feature of the unit that caused the unselected radio to continuously transmit. The designer include two hidden 220 ohm surface mount resistors for each of the 5 input/outputs. The box connects the tip and ring connections of any unselected jack to ground through these resistors. This was probably done to place a load on any unselected audio device to avoid damaging it if unselected, a good precaution. For my application, the resistors were activating the unselected device by grounding the connections through them. My solution was to disassemble the unit and remove the hidden chip resistors with a small soldering iron. After doing so, the device functioned as I expected. Note, for normal audio applications, this probably does NOT need to be done. The unit was very easy to take apart and reassemble due to its design. I noticed a great deal of soldering flux residue on the board that had not been cleaned off. This was hidden from view and probably did not affect operation, but I cleaned it off the board with a cotton cloth and naphtha solvent, being careful not to get the dissolved flux into the switches or jacks. This should have been done during factory assembly, but likely omitted because of the danger of contaminating the switch assembly and jacks.

## Features

- Versatile Connectivity: Easily switch between four audio sources with our 4-in-1-out/1-in-4-out configuration, perfect for seamless transitions between gaming, calls, and music.
- Compact & Portable: MC104 PRO’s ultra-small design fits any desk setup or travel bag, making it the ideal audio solution for on-the-go professionals and audiophiles.
- No Power Needed: Enjoy a pure, unaltered audio experience with our passive selector that requires no external power, preserving sound quality without any interference.
- User-Friendly Controls: Manage your audio with ease using the 4 fully-independent switches and one-button mute function, all designed for quick adjustments.
- High-Quality Build: Constructed with customized potentiometers and isolation modules, MC104 PRO ensures minimal background noise and reliable performance for all your audio needs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Q1W4484 |
| Best Sellers Rank | #791 in Audio & Video Selector Boxes |
| Brand | Douk Audio |
| Cable Type | Auxiliary |
| Color | black |
| Compatible Devices | PC |
| Connector Type | 3.5mm Jack |
| Connector Type Used on Cable | 3.5mm Jack |
| Customer Reviews | 4.3 out of 5 stars 286 Reviews |
| Item Dimensions D x W x H | 2.17"D x 3.31"W x 0.98"H |
| Manufacturer | Nobsound |
| Mfr Part Number | MC104 Pro |
| Model Number | MC104 Pro |
| Number of Ports | 4 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Douk Audio
- **Cable Type:** Auxiliary
- **Color:** black
- **Compatible Devices:** PC
- **Connector Type:** 3.5mm Jack

## Images

![Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker - Image 1](https://m.media-amazon.com/images/I/71ONuGXAHNL.jpg)
![Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker - Image 2](https://m.media-amazon.com/images/I/61uzE3wGvkL.jpg)
![Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker - Image 3](https://m.media-amazon.com/images/I/61bERLB2+YL.jpg)
![Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker - Image 4](https://m.media-amazon.com/images/I/61cn1XHBNEL.jpg)
![Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker - Image 5](https://m.media-amazon.com/images/I/71mva8ht26L.jpg)

## Questions & Answers

**Q: Can I listen to two different audio sources at once? Say I wanted to listen to my monitor speakers and my headphones at the same time?**
A: I don't believe that's possible from this device. There are 2 in/out ports, but when I plug my headphones into one it cuts out the speaker so it appears that those ports can't be used at the same time. I think they have 2 in/out ports for the purpose of allowing you to have all plugs on one side of the device or your output on the opposite side from your inputs. The 4 ports that are activated by the buttons can only be selected one at a time.

**Q: If I use it as 4 in 1 out, can 2 inputs be active at the same time??? Thanks**
A: Hello. It can't. If you want simultaneous output, you can buy this one https://www.amazon.com/dp/B07R7NVN6L?ref=myi_title_dp

**Q: I need to be able to switch between 2 devices connected to my pc: my speakers and my headset with mic. will my headset microphone work if i use this?**
A: Yes . . . if you use a cable to connect the Nobsound front jack to your PC speaker output, then cable from your speakers into one of the Nobsound rear switched jacks then your headset mic goes directly into the PC and the headset speaker cable into one of other Nobsound switched channels. The switches are totally mechanical so there is 100% isolation between channels. It's a "selector", not a "splitter". It allows only a single-channel-out. Press one button, it stays down. Press another button, the first one pops up. It's not really 1-in-4-out, but "1-in-1-out at a time". The "Mute" is handy and does not cancel the selected channel.

**Q: I've had 2 and i love this. !s there a version that has volume control on the 2 output ports (leaving the priority feature intact) ?**
A: There is a new version with volume control. Best is to visit the their store here at Amazon to get accurate information.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth the money
*by M***E on July 31, 2020*

I use this to switch sound between two computers to a set of desktop speakers. Works great and no sound lost or any kind of distortion. There are a total of four in ports so I could add more if I needed to. One cool design of this little control is you have all inputs in the back and one output in the back and one output in the front so all my wirers are out of the way falling behind the desk. It looks really nice sitting on the desktop secure with it's no slide rubber feet. Good product.

### ⭐⭐⭐⭐ Interesting design and works well. Beware one design feature!
*by D***N on November 30, 2022*

The device has no case and is constructed as a stack of circuit boards separated by standoffs, spacers and screws. The components are exposed, which is part of the appeal of the unit for my use and taste. The button assembly allows only a single button to be depressed at one time, connecting the common jack to one of four output/input jacks. If you plug a device into the single front-facing jack, it becomes the common jack, bypassing whatever is connected to the common jack at the rear. This very convenient, as it allows hiding cords at the rear, while allowing a headset or other device to be plugged in without moving the unit. The red button disconnects both the front and rear common jacks from the selected output jack. It can act as a mute switch and is very handy. My application was to switch DC low voltage levels (a Morse code ham radio “paddle” using a 3.5mm stereo plug) through the box to one of four ham radio transceivers. I discovered a feature of the unit that caused the unselected radio to continuously transmit. The designer include two hidden 220 ohm surface mount resistors for each of the 5 input/outputs. The box connects the tip and ring connections of any unselected jack to ground through these resistors. This was probably done to place a load on any unselected audio device to avoid damaging it if unselected, a good precaution. For my application, the resistors were activating the unselected device by grounding the connections through them. My solution was to disassemble the unit and remove the hidden chip resistors with a small soldering iron. After doing so, the device functioned as I expected. Note, for normal audio applications, this probably does NOT need to be done. The unit was very easy to take apart and reassemble due to its design. I noticed a great deal of soldering flux residue on the board that had not been cleaned off. This was hidden from view and probably did not affect operation, but I cleaned it off the board with a cotton cloth and naphtha solvent, being careful not to get the dissolved flux into the switches or jacks. This should have been done during factory assembly, but likely omitted because of the danger of contaminating the switch assembly and jacks.

### ⭐⭐⭐⭐⭐ Does what I wanted.
*by M***R on January 22, 2023*

As other have said, this is made with a couple circuit boards separated by standoffs and no case. The only issue with not having a case, is that I think after a while it will get dusty and dirty inside. It is small, but that is what I wanted. I did not need something to take up much desktop space. My application is simply connecting the output from my PC to several different audio sources. I run various applications that benefit from different audio amplification systems from headphones to Tanoy speakers. This device makes it easier to switch between them. I only need it to go to one source at a time so not being able to select more than one for output is not an issue. For what it cost, it was probably cheaper than having to go out and get the parts and make one myself. While they seem to work fine, I am a little concerned about the quality of the switches. They seem to be sturdy enough, but I am not sure how well they will hold up from repeated use. Time will tell. Until then I rate it upon current functionality.

## Frequently Bought Together

- Little Bear MC104 Pro Mini Audio Switcher, 4-Way 3.5mm AUX Stereo Passive Selector, Switch Box Splitter for PC/Player/Headphone/Amplifier/Speaker
- Maker Hart LOOP MIXER - Portable Audio Mixer with 5 Channel stereo inputs, 3 Outputs via 3.5mm jack. Including a Mono to Stereo DM2S Adapter.
- 2 Pack AUX Cable, (6.6ft/2m, Hi-Fi Sound) 3.5mm TRS Auxiliary Audio Cable Nylon Braided Cord Compatible with Car,Home Stereos,Speaker,iPod iPad,Headphones,Sony,Echo Dot,Beats (Grey)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.br/products/144750719-little-bear-mc104-pro-mini-audio-switcher-4-way-3](https://www.desertcart.com.br/products/144750719-little-bear-mc104-pro-mini-audio-switcher-4-way-3)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-07-10*