1. Introduction
The Soundstream VM-20B is a Single DIN mechless multimedia car stereo designed to provide efficient, hands-free access to media and communication tools in your vehicle. This unit replaces traditional CD slots with modern digital media options, offering a compact form factor for easy dashboard integration.
Key features include Bluetooth streaming, USB/Micro-SD playback, fast-charging support, and a built-in AM/FM tuner.
Figure 1: Front panel of the Soundstream VM-20B car stereo, showing the volume knob, display, USB ports, and control buttons.
2. Setup and Installation
The VM-20B is engineered to fit most vehicles with its ISO 1-DIN chassis. A mounting sleeve is included to ensure a snug and secure installation. Its mechless design enhances reliability by eliminating moving parts, making it suitable for various driving conditions.
2.1. Installation Process
- Preparation: Ensure the vehicle's battery is disconnected before beginning installation.
- Remove Existing Unit: Carefully remove the existing car stereo unit from the dashboard. Refer to your vehicle's service manual for specific instructions on panel removal.
- Mounting Sleeve: Insert the provided mounting sleeve into the vehicle's dashboard opening. Bend the multiple mounting tabs around the sleeve to secure it firmly.
- Wiring Connections: Connect the wiring harness from the VM-20B to your vehicle's wiring. Ensure all connections are secure and correctly matched (e.g., power, ground, speaker wires).
- Antenna Connection: Connect the vehicle's antenna cable to the ANT input on the rear of the VM-20B.
- Slide Unit into Sleeve: Carefully slide the VM-20B head unit into the mounting sleeve until it clicks securely into place.
- Test Functionality: Reconnect the vehicle battery and test all functions of the stereo (power, audio, radio, Bluetooth, USB, AUX).
- Reassemble: Reinstall any removed dashboard panels or trim pieces.
3. Operating Instructions
3.1. Power On/Off
Press the Power/Mode button to turn the unit on or off. A short press typically cycles through input modes.
3.2. Volume Control
Rotate the large central knob to adjust the volume level. Pressing the knob may mute/unmute the audio.
3.3. Mode Selection
Press the Mode button to cycle through available audio sources: FM/AM Radio, Bluetooth Audio, USB, SD Card, and AUX Input.
3.4. Media Playback Options
- USB Playback: Insert a USB flash drive into the dedicated USB port. The unit supports MP3 and WMA file formats.
- Micro-SD Card: Insert a Micro-SD card (up to 64 GB) into the designated slot for media playback.
- AUX Input: Connect external audio devices via the front-facing 3.5 mm AUX input.
3.5. Bluetooth & Wireless Audio Capabilities
The VM-20B features Bluetooth v4.0 for hands-free calling and high-quality audio streaming (A2DP). It also supports AVRCP for media playback control from your phone.
- Pairing: Enable Bluetooth on your mobile device and search for the VM-20B. Select the unit from the list and confirm pairing.
- Hands-Free Calling: Once paired, you can make and receive calls directly through the car stereo.
- Audio Streaming: Stream music wirelessly from your paired device.
3.6. AM/FM Radio Tuner
The built-in AM/FM tuner allows you to catch your favorite stations with ease. It stores 18 FM and 12 AM preset stations for quick access.
- Tuning: Use the Seek buttons to automatically find stations or manually tune.
- Presets: Press and hold a numbered button (1-6) to save the current station as a preset. Short press to recall a saved station.
3.7. Audio Performance and Output
The VM-20B integrates a 4-channel Class A/B amplifier with up to 300 watts max power. It includes a built-in 3-band equalizer with preset tone curves for sound customization.
- RCA Preamp Outputs: Four RCA preamp outputs (Front L/R + Rear L/R) are available for system expansion, such as connecting external amplifiers or subwoofers.
- Fast Charging: One of the dual USB ports provides 2.1A fast charging for smartphones and other devices.
4. Maintenance
To ensure optimal performance and longevity of your Soundstream VM-20B car stereo, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the front panel and display. Avoid abrasive cleaners or solvents.
- Connections: Periodically check all wiring connections for tightness and corrosion. Ensure the mounting sleeve remains secure.
- Software Updates: Check the Soundstream official website for any available firmware updates to ensure the best performance and compatibility.
- Fuse Replacement: If the unit loses power, check the fuse located on the rear of the unit. Replace it with a fuse of the correct type and amperage as specified in the manual.
5. Troubleshooting
If you encounter issues with your Soundstream VM-20B, refer to the following common questions and solutions:
- Q: What devices are supported by the VM-20B?
A: The unit supports USB flash drives, Micro-SD cards, smartphones (via Bluetooth or AUX), and other audio devices. - Q: Can I connect an amplifier or subwoofer?
A: Yes, the 4ch RCA preamp outputs allow for integration with external amplifiers or subwoofers. - Q: Is it compatible with both Android and iOS devices?
A: Yes, Bluetooth and AUX functions work with all major mobile platforms. - Q: The unit has no power.
A: Check the vehicle's fuse box and the fuse on the back of the stereo. Ensure all power connections are secure. - Q: No sound from speakers.
A: Verify speaker wiring connections. Check the volume level and ensure the unit is not muted. Confirm the correct audio source is selected. - Q: Bluetooth pairing fails.
A: Ensure Bluetooth is enabled on your mobile device and the VM-20B is in pairing mode. Try restarting both devices.
6. Specifications
- Item Weight: 1.09 pounds
- Product Dimensions: 7.48 x 5.51 x 2.36 inches
- Item Model Number: VM-20B
- Manufacturer: Epsilon (Soundstream)
- Connectivity: Bluetooth v4.0, Dual USB (1 for media, 1 for 2.1A charging), Micro-SD, 3.5mm AUX Input
- Audio Output: 4-channel Class A/B amplifier, 300 watts max power, 4ch RCA preamp outputs (Front L/R + Rear L/R), 3-band equalizer
- Tuner: AM/FM with 18 FM and 12 AM preset stations
- Media Formats: MP3, WMA
7. Warranty and Support
The Soundstream VM-20B comes with a 1 Year Manufacturer Warranty. For warranty claims, technical support, or further assistance, please contact Soundstream customer service or refer to the official Soundstream website for detailed support information.
