1. Introduction
The Yunseity Passive Volume Controller is designed for high-fidelity audio applications, providing precise volume control without requiring external power. It features professional 70mm faders and XLR interfaces for reliable input and output. This device ensures pure, distortion-free sound quality, making it suitable for various audio setups.
2. Safety Information
- Do not expose the device to water or excessive moisture.
- Avoid placing the device near heat sources or in direct sunlight.
- Do not attempt to open or modify the device. Refer all servicing to qualified personnel.
- Use only compatible audio cables and connectors.
3. Package Contents
Please check that all items are present:
- 1 x Yunseity Passive Volume Controller
- 1 x Instruction Manual
4. Product Overview
The Yunseity Passive Volume Controller features a robust metal housing and professional-grade components. It includes XLR/phone type plug input interfaces and XLR output interfaces. Two 70mm faders provide independent volume control for two output channels.

Front view of the Yunseity Passive Volume Controller, showing input/output XLR ports and dual 70mm faders.

Detailed view of the Yunseity Passive Volume Controller's interface, labeling the [MIC/LINE] XLR type balanced inputs, [MIC] XLR balanced outputs, and Channel 1 and Channel 2 output volume controls.
5. Setup
The Yunseity Passive Volume Controller is a plug-and-play device that does not require external power. Follow these steps for setup:
- Connect your audio source (e.g., mixer, audio interface, laptop, smartphone) to the [MIC/LINE] XLR type balanced input ports on the controller. These ports support both XLR and 1/4-inch phone type plugs.
- Connect your audio output devices (e.g., active speakers, amplifier) to the [MIC] XLR balanced output ports (Output 1 and Output 2) on the controller.
- Ensure all connections are secure. The device operates without external power.

Diagram illustrating input connections to the Yunseity Passive Volume Controller, showing various sources like a media player, laptop, and smartphone connecting via XLR/LINE inputs.

Diagram illustrating output connections from the Yunseity Passive Volume Controller to audio devices like speakers and an amplifier via XLR balanced output ports.

Yunseity Passive Volume Controller connected to a laptop and other audio equipment, demonstrating its plug-and-play functionality.
6. Operation
The Yunseity Passive Volume Controller features two independent 70mm faders for precise control over Output 1 and Output 2 volume levels. Move the faders up to increase volume and down to decrease volume. The faders provide a smooth and accurate adjustment range for a customized listening experience.

Close-up of the 70mm extended stroke faders on the Yunseity Passive Volume Controller, emphasizing their role in accurate tuning and volume control.
7. Maintenance
To ensure the longevity and optimal performance of your Yunseity Passive Volume Controller:
- Clean the device with a soft, dry cloth. Avoid using liquid cleaners or solvents.
- Keep the device away from moisture, dust, and extreme temperatures.
- Periodically check cable connections for secure fit.
8. Troubleshooting
- No Sound: Check all cable connections between your audio source, the controller, and your output devices. Ensure input sources are active and output devices are powered on and set to an appropriate volume. Verify that the faders on the controller are not at their minimum position.
- Distorted Sound: Ensure that the input levels from your audio source are not too high, which could cause clipping. Check the integrity of all audio cables for damage.
- Intermittent Sound: Inspect all cable connections for looseness. Try using different cables to rule out faulty wiring.
9. Specifications
| Feature | Specification |
|---|---|
| Item Type | Passive Volumes Controller |
| Material | Iron shell |
| Input Interface | XLR/phone type plug |
| Output Interface | XLR |
| Input Channel | Supports one pair of stereo inputs |
| Output Channel | Supports 2 pairs of stereo outputs |
| Volume Control | Professional 70mm faders |
| Power Supply | No external power required |
| Item Weight | 1.25 pounds |
| Package Dimensions | 9.84 x 5.12 x 2.36 inches |
| Model Number | Yunseitygmz54p21sd |

Angled view of the Yunseity Passive Volume Controller, showcasing its full metal housing and gold-plated anti-interference interfaces.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact Yunseity customer service through the retailer where the product was purchased.