Introduction
The Velex Marine Bluetooth Amplifier VX505 is a waterproof, 4-channel Class D amplifier designed for audio systems in marine, UTV, golf cart, and motorcycle environments. This amplifier provides robust sound output and features a wired remote controller for convenient operation, eliminating the need for a traditional head unit.
Image: The Velex VX505 amplifier unit shown with its wired remote control, highlighting its compact design and connectivity.
Key Features
- Waterproof Marine Bluetooth Amplifier (IPX5 rated)
- 4-Channel Class D Amplifier
- 3-meter Wired Remote with 3-color LED indicator (sources: USB/AUX/Bluetooth)
- Bluetooth Audio Streaming
- RMS Power: 60W x 4CH
- Durable construction with rust-proof aluminum heatsink and stainless steel mounting kits.
Setup & Installation
1. Component Overview
Familiarize yourself with the amplifier unit, wired remote, and various connections. The amplifier is designed for hidden installation, with the wired remote providing primary control.
Image: Detailed view of the VX505 amplifier, its wired remote, and the various input/output cables including RCA, USB, and power connections.
2. Wiring Connections
Ensure all connections are secure and properly insulated to prevent short circuits and ensure optimal performance. The wired remote uses an S-terminal connector; ensure this connection is always tight.
Power and Ground Wiring
- Red Wire (+12V Ignition On): Connect to a switched 12V power source.
- Yellow Wire (+12V Battery Constant): Connect directly to the positive terminal of the vehicle's 12V battery.
- Black Wire (-12V Negative / Ground): Connect to a solid chassis ground point or the negative terminal of the battery.
Image: Diagram illustrating the standard and second choice wiring methods for marine stereo power and ground, showing connections to the 12V battery and fuse holder.
Speaker Wiring
Connect your speakers to the appropriate channels. The amplifier supports various configurations, including bridging channels for higher power output to subwoofers.
Image: Comprehensive wiring diagram showing connections from a marine stereo head unit to the VX65B speakers and the main power source, including fuse box and switches.
3. Bluetooth Pairing
To stream audio wirelessly, enable Bluetooth on your device (e.g., smartphone, tablet) and search for "Velex" or "VX505" in the available devices list. Select it to pair. Once paired, you can control playback directly from your device or the wired remote.
Video: This video demonstrates the playback and wiring process for the Velex VX505 amplifier, including connecting power, speakers, and pairing a Bluetooth device for audio streaming.
Operating Instructions
1. Wired Remote Control
The wired remote provides essential controls for your audio system:
- Volume Up/Down: Adjusts the audio level.
- SRC (Source): Toggles between input sources (USB/AUX/Bluetooth).
- Play/Pause: Controls media playback.
- Next/Previous Track: Navigates through media tracks.
Image: Close-up of the wired remote control, detailing the functions of each button for volume, source selection, and track control.
2. Input Modes and Crossovers
The amplifier features adjustable input modes and crossover settings to optimize sound output for different speaker types.
- Input Mode (2CH/4CH): Select 2-channel mode if your head unit has only one set of RCA outputs, or 4-channel mode if it has two sets.
- HPF (High-Pass Filter): Allows higher frequencies to pass through, ideal for full-range speakers or tweeters.
- LPF (Low-Pass Filter): Allows lower frequencies to pass through, ideal for subwoofers.
- FULL: Bypasses the crossover, allowing speakers to play the full range of frequencies.
- Bass EQ: Provides an additional boost to low-end frequencies (0dB to 12dB).
Video: This video provides a full view of the Velex VX505 amplifier, demonstrating its various input/output options, control knobs, and settings for optimal audio configuration.
Speaker Configurations
The VX505 amplifier offers flexibility for various speaker setups. Here are some common configurations:
- 4 Full-Range Speakers: Connect one speaker per channel. Set crossovers to FULL.
- 2 Full-Range Speakers + 1 Subwoofer: Connect full-range speakers to Channels 1 & 2 (HPF or FULL). Bridge Channels 3 & 4 for the subwoofer (LPF).
- 4 Tweeters: Connect one tweeter per channel. Set crossovers to HPF.
- 2 Mid-Range Speakers + 2 Tweeters: Connect mid-range speakers to Channels 1 & 2 (FULL). Connect tweeters to Channels 3 & 4 (HPF).
Image: The Velex VX505 amplifier and remote shown in a golf cart setting, illustrating its application in recreational vehicles with Bluetooth streaming capabilities.
Maintenance
To ensure the longevity and optimal performance of your Velex Marine Bluetooth Amplifier VX505, follow these maintenance guidelines:
- Regular Cleaning: Periodically wipe the amplifier and remote with a soft, damp cloth to remove dust and grime. Avoid harsh chemicals or abrasive cleaners.
- Inspect Connections: Regularly check all wiring connections for tightness and signs of corrosion. Secure any loose connections immediately.
- Protect from Extreme Conditions: While waterproof, avoid prolonged exposure to direct sunlight or extreme temperatures when possible.
- Wired Remote Care: Ensure the S-terminal connector for the wired remote is always tight to maintain its waterproof seal and functionality.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power | Blown fuse, loose power/ground connection, incorrect wiring. | Check and replace fuses. Verify all power and ground connections are secure. Ensure correct wiring as per the setup section. |
| No Audio Output | Incorrect input source selected, loose speaker wires, Bluetooth not paired. | Select the correct input source using the wired remote. Check speaker wire connections. Re-pair Bluetooth device. |
| Distorted Sound | Gain/level set too high, incorrect crossover settings, speaker impedance mismatch. | Adjust gain/level settings. Verify crossover settings are appropriate for your speakers. Ensure speaker impedance is compatible (2-ohm stable per channel). |
| Bluetooth Disconnection | Device out of range, interference, low device battery. | Keep the Bluetooth device within range. Minimize interference from other electronic devices. Charge your Bluetooth device. |
Specifications
| Feature | Detail |
|---|---|
| Brand | Velex |
| Model Number | VX505 |
| Number of Channels | 4 |
| Output Power (RMS) | 240 Watts (60W x 4CH) |
| Maximum Wattage | 800 Watts |
| Voltage | 12 Volts |
| Minimum Supply Voltage | 10.8 Volts (DC) |
| Maximum Supply Voltage | 15.6 Volts (DC) |
| Waterproof Rating | IPX5 |
| Mounting Type | Surface Mount |
| Item Weight | 2.68 pounds |
| Package Dimensions | 12.32 x 8.43 x 3.07 inches |
Warranty & Support
For warranty information, product support, or technical assistance, please refer to the documentation included with your purchase or visit the official Velex website. Protection plans are also available for extended coverage.
- Protection Plans: 2-Year and 3-Year protection plans are available.
