Vizio SB3651-E6 Sound Bar: Comprehensive Guide
This guide offers detailed instructions, troubleshooting, and feature explanations for the Vizio SB3651-E6 sound bar,
including access to the free PDF manual and support resources.
The Vizio SB3651-E6 is a 36-inch 5.1 channel sound bar system designed to significantly enhance your home theater audio experience. This system, popular for its value and performance, often requires referencing the user manual for optimal setup and functionality.
Finding the correct manual is crucial, as various versions exist. Free PDF downloads of the Quick Start Manual (49 pages) are readily available online; These resources detail initial setup, component identification, and basic operational instructions. Common issues, like unresponsive remotes, are often addressed with simple troubleshooting steps – such as power cycling the sound bar – detailed within the documentation.
Understanding the FCC ID (XN6-SB3651E6) can also be helpful when searching for specific support information. This guide will navigate you through utilizing the manual and Vizio’s support resources effectively.
Key Features and Specifications
The Vizio SB3651-E6 boasts a 36-inch sound bar and a separate subwoofer, delivering immersive 5.1 surround sound. Key features, detailed in the user manual, include Dolby Digital decoding and DTS support for enhanced audio quality. Connectivity options encompass HDMI ARC/eARC, optical audio input, and Bluetooth for wireless streaming.
Specifications, as outlined in the FCC documentation for XN6-SB3651E6, include support for various audio formats. The manual clarifies power requirements and provides dimensional details (length, height, and depth) alongside the system’s weight. Understanding these specifications is vital for proper placement and integration with your existing home theater setup.
The manual also highlights compatibility with Vizio’s SmartCast Mobile App for convenient control and customization.

Setting Up Your Vizio SB3651-E6
Follow the quick start manual for easy setup: unpack components, connect via HDMI ARC/eARC or optical, and pair the subwoofer for optimal sound.
Unboxing and Component Check
Carefully unpack your Vizio SB3651-E6 sound bar system. Ensure all components are present before proceeding. You should find the sound bar itself, a wireless subwoofer, a remote control, power cables for both the sound bar and subwoofer, an HDMI cable, and the quick start guide/manual.
Inspect each item for any physical damage incurred during shipping. If anything appears damaged, immediately contact Vizio support or the retailer where you purchased the system. Retain all packaging materials for potential returns or warranty claims. Verify the model and serial numbers on the devices match those listed on the packaging and in the included documentation. A complete component check ensures a smooth setup process.
Connecting to Your Vizio TV (eARC/ARC)
For optimal audio quality, connect your Vizio SB3651-E6 to your Vizio TV using the eARC (enhanced Audio Return Channel) or ARC (Audio Return Channel) HDMI port. Locate the labeled HDMI port on both your TV and the sound bar.
Connect one end of the provided HDMI cable to the eARC/ARC HDMI port on your TV and the other end to the ARC HDMI IN port on the sound bar. Ensure the HDMI-CEC (Consumer Electronics Control) setting is enabled in your TV’s settings menu; this allows the TV remote to control the sound bar’s volume. Select “HDMI ARC” as the audio output on your Vizio TV. This setup delivers high-quality audio, including Dolby Atmos if supported.
Connecting Other Devices via HDMI
The Vizio SB3651-E6 features additional HDMI inputs for connecting devices like Blu-ray players, gaming consoles, or streaming devices. Connect the HDMI output of your device to one of the available HDMI IN ports on the sound bar.
After connecting, use the sound bar’s remote to select the corresponding HDMI input source. Ensure your device’s audio output is set to “Bitstream” or “Dolby Digital” for optimal compatibility. The sound bar will then process the audio signal. Note that passing through video signals may depend on the connected device’s capabilities and HDMI version support. This allows for a streamlined audio and video experience.
Optical Audio Connection Guide
The Vizio SB3651-E6 utilizes an optical audio input for connecting to devices lacking HDMI ARC/eARC capabilities. Connect an optical cable from the “Optical Out” port on your TV or device to the “Optical In” port on the sound bar.
On your TV or device, navigate to the audio settings and select “Optical” or “PCM” as the audio output format. Then, use the sound bar’s remote to select the “Optical” input source. Optical connections transmit digital audio signals, providing clear sound quality. Note that optical connections do not support Dolby Atmos; they are limited to Dolby Digital or PCM stereo. Ensure a secure connection for optimal performance.
Subwoofer Pairing Instructions
The Vizio SB3651-E6 subwoofer typically pairs automatically upon powering on both the sound bar and subwoofer. If pairing fails, initiate manual pairing by pressing and holding the “Subwoofer Pairing” button on the back of the subwoofer for approximately three seconds.
Simultaneously, power cycle the sound bar – unplug it, wait ten seconds, and plug it back in. The LED indicator on the subwoofer will flash, indicating pairing mode. Once paired, the flashing will stop. Ensure the subwoofer is within 30 feet of the sound bar, free from obstructions. If issues persist, try resetting both devices and repeating the pairing process. Refer to the user manual for detailed diagrams.

Understanding the Remote Control
The Vizio SB3651-E6 remote controls volume, input, sound modes, and settings. Unresponsive remotes may require battery replacement or a power cycle of the soundbar.
Remote Control Button Functions
The Vizio SB3651-E6 remote features several key buttons for operation. The Power button turns the sound bar on and off. Volume Up/Down controls the audio level. Input selection allows switching between connected devices like HDMI, Optical, or Bluetooth.
The Mode button cycles through preset sound modes – Music, Movie, Direct, and Standard – optimizing audio for different content. The Menu/Nav buttons access on-screen settings for customization. The Select button confirms choices within the menu.
Additionally, there are dedicated buttons for Bass Boost and DTS Virtual:X (if supported). Some remotes utilize IR technology, requiring line-of-sight to the soundbar. Refer to the user manual for a detailed diagram and explanation of each button’s function.
Troubleshooting Remote Control Issues
If your Vizio SB3651-E6 remote isn’t working, start with basic checks. Ensure fresh batteries are installed correctly. Confirm there’s a clear line of sight between the remote and the sound bar’s IR sensor – obstructions can interfere. Try unplugging the sound bar for ten seconds, then plugging it back in; this often resolves communication glitches.
If issues persist, check for interference from other devices emitting IR signals. Some Vizio TVs use IR remotes, potentially causing conflicts. Avoid direct sunlight on the sound bar. If the remote is still unresponsive, consult the user manual for pairing instructions (if applicable) or contact Vizio support for assistance.

Sound Settings and Customization
Explore the SB3651-E6’s audio options: adjust bass/treble, utilize equalizer presets, select surround sound modes, and configure Dolby Atmos for optimal listening.

Adjusting Bass and Treble
Fine-tune your audio experience with the Vizio SB3651-E6’s bass and treble controls. Access these settings through the sound bar’s on-screen display (OSD) using your remote. Navigate to the ‘Audio’ menu, and you’ll find separate sliders for both bass and treble adjustment.
Increasing the bass enhances low-frequency sounds, like explosions in movies or the thump of music. Conversely, boosting the treble emphasizes higher frequencies, improving clarity for dialogue or crisp instrumentals. Experiment with these settings to find the perfect balance for your content and room acoustics.
Start with small adjustments – a little goes a long way. Overly boosting either frequency can distort the sound. Remember to consider the source material; some content may already have emphasized bass or treble.
Equalizer Settings Explained
The Vizio SB3651-E6 offers customizable equalizer (EQ) settings to precisely shape your audio. Access the EQ through the sound bar’s on-screen display (OSD) via the ‘Audio’ menu. Typically, you’ll find preset EQ modes like ‘Movie,’ ‘Music,’ ‘Game,’ and ‘Direct.’
‘Movie’ enhances dialogue and dynamic range, while ‘Music’ prioritizes clarity and balance for musical enjoyment. ‘Game’ optimizes sound for immersive gaming experiences, and ‘Direct’ provides a flat response for purists.
For advanced users, a manual EQ mode allows granular control over specific frequency bands. Adjusting these bands lets you boost or cut frequencies to tailor the sound to your preferences and room characteristics. Experiment to find the optimal sound signature!
Surround Sound Mode Options
The Vizio SB3651-E6 provides several surround sound modes to enhance your listening experience. These modes simulate a wider soundstage, creating a more immersive audio environment. Available options typically include ‘Standard,’ ‘Dolby Surround,’ and ‘DTS Virtual:X.’
‘Standard’ utilizes Vizio’s processing to create a virtual surround effect. ‘Dolby Surround’ upmixes stereo content to simulate a 5.1 surround sound experience, offering greater depth and spaciousness. ‘DTS Virtual:X’ delivers a heightened sense of immersion, simulating overhead sound without requiring dedicated height speakers.
Experiment with each mode to determine which best suits your content and room setup. The optimal choice depends on the source material and your personal preference for soundstage width and clarity.
Dolby Atmos Compatibility and Setup
While the Vizio SB3651-E6 supports Dolby Atmos pass-through, it doesn’t natively decode Dolby Atmos. This means the soundbar will transmit an Atmos signal to a compatible receiver or TV that can decode it. Ensure your source device (like a Blu-ray player or streaming device) is set to output Dolby Atmos.
For optimal Atmos performance, connect the soundbar to your Atmos-enabled TV or receiver via HDMI eARC. eARC (enhanced Audio Return Channel) provides higher bandwidth for lossless Atmos transmission. Verify your TV’s audio settings are configured to output Dolby Atmos over eARC.
If using ARC, Atmos may be limited to compressed formats. Proper setup and compatible devices are crucial for experiencing the full benefits of Dolby Atmos.

Troubleshooting Common Issues
This section details solutions for frequent problems, including unresponsive soundbars, lack of audio, subwoofer sync issues, and HDMI ARC/eARC connectivity challenges.
Sound Bar Not Responding
If your Vizio SB3651-E6 sound bar isn’t responding, begin with a simple power cycle. Unplug the sound bar from the electrical outlet, wait approximately ten seconds, and then plug it back in. This often resolves temporary glitches preventing operation.
Verify the power cord is securely connected to both the sound bar and the wall outlet. Also, ensure the outlet itself is functioning correctly by testing it with another device. If the issue persists, check the remote control’s batteries and ensure they are fresh.
A factory reset can sometimes resolve deeper issues, but note this will erase custom settings. Consult the user manual (available for free PDF download online) for instructions on performing a factory reset on your specific model.
No Sound Output
If you experience no sound from your Vizio SB3651-E6, first confirm the volume is not muted on both the sound bar and your connected TV or device. Double-check all cable connections – HDMI, optical, or ARC – ensuring they are firmly seated. Try a different input source on the sound bar to rule out a problem with the original source.
Verify the sound bar is set to the correct input corresponding to the connected device. If using ARC, ensure ARC is enabled in both your TV’s and sound bar’s settings. Consult the downloadable user manual for specific instructions on accessing these settings.
Test with a different audio cable to eliminate a faulty cable as the cause. Finally, a power cycle of both the sound bar and the TV can often resolve synchronization issues.
Subwoofer Synchronization Problems
If your Vizio SB3651-E6 subwoofer isn’t pairing or frequently disconnects, initiate the pairing process again. Locate the pairing button on the rear of the subwoofer and hold it until the LED indicator flashes. The sound bar should automatically detect and connect to the subwoofer.
Ensure there are no obstructions or excessive distance between the sound bar and subwoofer, as this can interfere with the wireless signal. Resetting both the sound bar and subwoofer can often resolve connectivity issues; unplug both for 60 seconds, then plug the sound bar in first, followed by the subwoofer.
Refer to the user manual for detailed pairing instructions and troubleshooting steps specific to your model.
HDMI ARC/eARC Issues
Experiencing problems with HDMI ARC/eARC? First, verify you’re using a high-speed HDMI cable and it’s securely connected to both the TV’s ARC/eARC port and the sound bar’s HDMI ARC input. Ensure ARC/eARC is enabled in your TV’s audio settings; the setting name varies by manufacturer.
If no sound is output, try different HDMI ports on your TV. Some TVs require specific ports for ARC functionality. A power cycle of both the TV and sound bar can often resolve communication glitches. Check the Vizio user manual for specific ARC/eARC setup instructions for your TV model.
Confirm compatibility – not all TVs fully support ARC/eARC.

Advanced Features & Functionality
Explore Bluetooth pairing, firmware updates via the Vizio SmartCast app, and enhanced control options detailed in the user manual for optimal performance.
Bluetooth Connectivity Guide
Pairing your devices via Bluetooth unlocks wireless audio streaming capabilities with the Vizio SB3651-E6. To initiate pairing, ensure the sound bar is in Bluetooth mode – typically activated through the remote control.
Then, on your smartphone, tablet, or laptop, enable Bluetooth and search for available devices. The SB3651-E6 should appear in the list. Select it to begin the pairing process. You may be prompted for a PIN; if so, enter “0000”.
Once connected, you can enjoy music and audio from your paired device. The user manual details troubleshooting steps for connection issues, like forgetting the device or interference. Remember to keep the devices within a reasonable range for a stable connection.
Firmware Updates and How to Apply Them
Keeping your Vizio SB3651-E6’s firmware updated is crucial for optimal performance and access to new features. Vizio periodically releases firmware updates to improve sound quality, fix bugs, and enhance compatibility.
To check for updates, navigate to the sound bar’s settings menu using the remote. Look for a “System” or “Software Update” option. If an update is available, follow the on-screen prompts to download and install it. Important: Do not interrupt the update process, as this could damage the sound bar.

The user manual provides detailed instructions and cautions regarding firmware updates. Regularly checking for updates ensures your SB3651-E6 operates at its best.
Using the Vizio SmartCast Mobile App
The Vizio SmartCast mobile app enhances your SB3651-E6 experience, offering convenient control and expanded functionality. Download the app from your device’s app store (iOS or Android) and follow the on-screen instructions to connect it to your sound bar.
Once connected, you can control volume, adjust sound settings, switch input sources, and even stream music directly to the sound bar. The app also provides access to various streaming services, creating a centralized entertainment hub.
Refer to the user manual for detailed app navigation and troubleshooting tips. The SmartCast app simplifies sound bar management and unlocks its full potential.

Technical Specifications
Detailed specifications for the Vizio SB3651-E6 include power requirements, dimensions, weight, and supported audio formats, as outlined in the manual.
Power Requirements
The Vizio SB3651-E6 sound bar operates on standard AC power. Specifically, it requires 100-240V at 50/60Hz. The sound bar’s power consumption varies depending on usage, but typically falls within a range of 60W to 80W during normal operation. The subwoofer also requires AC power, operating at the same voltage range and frequency.
It’s crucial to use the provided power cords and ensure they are securely connected to both the sound bar and subwoofer, as well as a grounded electrical outlet. The manual emphasizes avoiding the use of extension cords or power strips, as they may interfere with optimal performance. Always verify the voltage compatibility before connecting to a power source.
Dimensions and Weight
The Vizio SB3651-E6 sound bar measures approximately 36 inches (91.4 cm) in width, 3.3 inches (8.4 cm) in height, and 4.5 inches (11.4 cm) in depth. This compact size allows for versatile placement within your entertainment setup. The accompanying wireless subwoofer has dimensions of roughly 8.3 inches (21.1 cm) in width, 13.4 inches (34 cm) in height, and 10.2 inches (25.9 cm) in depth.
Regarding weight, the sound bar itself weighs around 6.4 pounds (2.9 kg); The subwoofer is considerably heavier, weighing approximately 14.3 pounds (6.5 kg). These weights are important to consider when planning installation and ensuring stable placement on your TV stand or mounting surface.
Supported Audio Formats
The Vizio SB3651-E6 sound bar is designed to decode a wide range of audio formats, enhancing your listening experience. It natively supports Dolby Digital, DTS Digital Surround, and PCM stereo; These formats are commonly found in movies, TV shows, and streaming services, ensuring broad compatibility with your content library.
Furthermore, the sound bar supports Dolby Atmos, though its implementation relies on the source material and connection type (eARC is recommended for optimal Atmos performance). It also handles DTS-HD Master Audio and DTS:X via bitstream passthrough, allowing compatible source devices to directly decode these formats. The SB3651-E6 provides a versatile audio solution for diverse entertainment needs.

Resources and Support
Access the official Vizio support website for manuals, FAQs, and contact information. Download the SB3651-E6 PDF manual and find the FCC ID: XN6-SB3651E6.
Downloading the User Manual (PDF)
Locating the official Vizio SB3651-E6 user manual in PDF format is straightforward. Vizio provides readily available digital copies on their support website. This comprehensive document, spanning 49 pages as per available resources, details everything from initial setup and component identification to advanced features and troubleshooting steps.
You can easily download this manual to your computer or mobile device for offline access. It’s an invaluable resource for understanding all aspects of your sound bar’s functionality. The PDF includes detailed diagrams, safety precautions, and specifications, ensuring you can maximize your audio experience. A direct link can typically be found through Vizio’s support pages dedicated to the SB3651-E6 model.
Vizio Support Website and Contact Information
For comprehensive assistance with your Vizio SB3651-E6 sound bar, the official Vizio Support website is your primary resource. It features trending support topics, helpful video tutorials, and a searchable knowledge base addressing common issues. You’ll find frequently asked questions, troubleshooting guides, and downloadable resources, including the user manual.
If you require direct assistance, Vizio offers several contact options. These typically include a live chat feature for immediate support, a dedicated phone line for speaking with a support representative, and an email contact form for submitting inquiries. The website provides up-to-date contact details and operating hours. Accessing support is crucial for resolving any issues and maximizing your sound bar experience.
FCC ID Information (XN6-SB3651E6)
The Vizio SB3651-E6 sound bar is subject to Federal Communications Commission (FCC) regulations, ensuring it meets standards for electromagnetic interference. Its unique FCC ID is XN6-SB3651E6, assigned to Zylux Acoustic Corporation, the manufacturer. This ID is crucial for regulatory compliance and identification purposes.
This identification number is found within the product documentation, including the user manual and on the device itself. It allows the FCC to track and regulate the device’s radio frequency emissions. Information regarding FCC compliance can be found on the FCC website using this ID. Understanding this information is important for consumers and regulatory bodies alike, confirming the product’s adherence to safety and operational standards.