1. Product Overview
The SOLUPEAK S3 is a compact, passive 3-way RCA audio switch box designed to simplify the management of multiple stereo audio sources. It allows you to connect up to three stereo audio input devices (such as CD players, DVD players, TVs, or PCs) and select one output device using a rotary knob. Being a passive device, it requires no external power supply.

This device is ideal for users who need to switch between different audio sources without constantly plugging and unplugging cables, ensuring no signal loss due to its specialized audio rotary switch and quality golden-plated RCA terminals.
2. Setup Instructions
Follow these steps to connect your SOLUPEAK S3 audio switch box:
- Identify Inputs and Outputs: On the rear panel of the SOLUPEAK S3, locate the "IN" RCA jacks (labeled 1, 2, 3) and the "OUT" RCA jacks.
- Connect Audio Sources: Connect the output cables from your audio source devices (e.g., CD player, TV, PC) to the "IN" RCA jacks (1, 2, or 3) on the back of the SOLUPEAK S3. Ensure left and right channels are matched (typically red for right, white/black for left).
- Connect Audio Output: Connect the "OUT" RCA jacks of the SOLUPEAK S3 to the input of your audio receiver, amplifier, or speakers.


The SOLUPEAK S3 is a passive device and does not require an external power supply. It is plug-and-play.
3. Operating Instructions
Once your audio sources and output device are connected to the SOLUPEAK S3, operating the switch box is straightforward:
- Select Audio Source: Use the large rotary knob on the front panel of the SOLUPEAK S3 to select your desired audio input source. The knob has positions labeled 'OFF', '1', '2', and '3'.
- Switching Inputs: Turn the knob to position '1' to listen to the device connected to Input 1, '2' for Input 2, and '3' for Input 3.
- Power Off: Turn the knob to the 'OFF' position to disconnect all audio inputs from the output.
Important Note:
The SOLUPEAK S3 is designed for "3 IN 1 OUT" operation, meaning it allows you to select one audio output from three stereo sources. It does NOT output all three audio sources simultaneously. If you connect one source to 'OUT' and three devices to 'IN', only one 'IN' device can be selected at a time. Similarly, if you were to use it in a "1 IN 3 OUT" configuration (connecting one source to an 'IN' port and three output devices to the 'OUT' port), the three outputs would not be simultaneous.
4. Specifications
| Feature | Detail |
|---|---|
| Brand Name | SOLUPEAK |
| Model | S3 |
| Channels | 2 (2.0 Stereo) |
| Maximum Power Per Channel | NO POWER (Passive Device) |
| Input/Output Configuration | 3 Stereo RCA Inputs, 1 Stereo RCA Output |
| Switch Type | Specialized Audio Rotary Switch |
| Connectors | Golden Plated RCA Terminals |
| Chassis Material | Solid Aluminum Case (Front: 6mm, Other plates: 3mm) |
| Knob Material | CNC Solid Aluminum |
| Power Requirement | None (Passive) |
| Dimensions (Approx.) | Length: 21 cm, Width: 15 cm, Height: 7 cm |
| Weight (Approx.) | 0.68 kg |
| Origin | Mainland China |
| Hign-concerned Chemical | None |

5. Maintenance
The SOLUPEAK S3 is designed for durability and requires minimal maintenance. To ensure optimal performance and longevity:
- Cleaning: Wipe the aluminum chassis with a soft, dry cloth to remove dust. Avoid using harsh chemicals or abrasive cleaners.
- Connection Care: The golden-plated RCA terminals are designed to resist oxidation and rust. However, periodically check connections to ensure they are secure and free from dust or debris.
- Storage: When not in use for extended periods, store the unit in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
If you encounter any issues with your SOLUPEAK S3, refer to the following common troubleshooting tips:
- No Audio Output:
- Ensure all RCA cables are securely connected to both the SOLUPEAK S3 and your audio devices.
- Verify that the rotary knob on the front panel is set to the correct input number (1, 2, or 3) corresponding to the active audio source.
- Check that your audio source device is powered on and playing audio.
- Confirm that your output device (amplifier/speakers) is powered on, set to the correct input, and its volume is adjusted appropriately.
- Distorted or Low-Quality Audio:
- Inspect RCA cables for damage or loose connections. Try swapping cables if possible.
- Ensure the golden-plated RCA terminals are clean and free from dust or corrosion.
- Test with a different audio source or output device to isolate the problem.
- Only One Channel (Left or Right) is Working:
- Check the individual RCA connections for the affected channel (red for right, white/black for left) on both the input and output sides of the SOLUPEAK S3.
- Ensure the RCA cables themselves are not faulty.
- Expecting Multiple Outputs Simultaneously:
- The SOLUPEAK S3 is a "3 IN 1 OUT" selector. It is designed to select only one audio source at a time for output. It does not support simultaneous output of multiple sources.
As a passive device, the SOLUPEAK S3 does not require power, so power-related issues are not applicable to this unit.
7. Warranty and Support
Your SOLUPEAK S3 RCA Switch Box is backed by the following service commitments:
- Free Returns: Enjoy free returns within 90 days of purchase.
- Fast Delivery Guarantee:
- Receive a $1.00 coupon code if delivery is delayed.
- Full refund if the package is lost.
- Full refund if items are damaged upon arrival.
- Full refund if no delivery is made within 30 days.
- Security & Privacy: Your personal details are protected and not shared with third parties without your consent. Payments are secure.
For further assistance, technical support, or warranty claims, please contact the seller, Mshow Store, directly through the platform where the purchase was made.